LUMEL N32P-09 Digital Panel Meter User Manual

User Manual for LUMEL models including: N32P-09 Digital Panel Meter, N32P-09, Digital Panel Meter, Panel Meter, Meter

DIGITAL PANEL METER SERVICE MANUAL

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N32P service manual

N32P-09

User's manual

DIGITAL PANEL METER
N32P

SERVICE MANUAL

N32P-09

User's manual

Contents
1 Application.......................................................................................................................................3 2 Meter set...........................................................................................................................................5 3 Basic requirements, operational safety.............................................................................................5 4 Installation........................................................................................................................................6
4.1 Installation method...................................................................................................................6 4.2 External connection diagram....................................................................................................7 5 Service............................................................................................................................................10 5.1 Description of the frontal plate...............................................................................................10 5.2 Buttons' functions...................................................................................................................12 5.3 Programming meter parameters..............................................................................................13
5.3.1 How to change quantity of a selected parameter............................................................15 5.3.2 Programmable meter parameters, default parameters.....................................................16 5.4 Meter functions.......................................................................................................................22 5.4.1 Measurement...................................................................................................................22
5.4.1.1 Averaging the measuring quantities.........................................................................23 5.4.1.2 Minimum and maximum measuring values............................................................24 5.4.2 Analog output..................................................................................................................25 5.4.3 Alarm outputs..................................................................................................................26 5.4.4 Binary output...................................................................................................................27 5.5 RS-485 interface.....................................................................................................................28 5.5.1 Connection......................................................................................................................28 5.5.2 Description of the MODBUS protocol implementation.................................................29 5.5.3 Implemented functions of MODBUS protocol...............................................................29 5.5.4 Map of the registers.........................................................................................................30 5.5.4.1 Registers 3000 3127.............................................................................................30 5.5.4.2 Registers 4000 4054.............................................................................................31 5.5.4.3 Registers 4200 4261.............................................................................................36 5.5.4.4 Registers 7500 7559 and 7000 7119.................................................................38 5.5.4.5 Registers 7600 7677 and 7200 7355.................................................................40 6 Error codes......................................................................................................................................41 7 Technical data.................................................................................................................................42 8 Ordering code.................................................................................................................................45

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1 Application
The N32P meter is a digital panel meter adapted to be fixed to the panel. The N32P meters are designed to measure voltage, current, power and energy in AC circuits. Voltage and current measurement can be dome directly or using an external current and voltage transformers. The parameters of the transformers used can be configured in the N32P meter, so the indicated measuring values will correspond to the actual measuring values on the primary of the transformers. The N32P meters also enable to measure only a single parameter, e.g. only current, where the meter operation is synchronized with the current signal waveform.
Additionally, the meter supports the programmable alarms with the delay activation and deactivation function as well as a memory of the alarm event. The functionality of the meter is complemented by a programmable analog output - RS-485 interface.
The user interface consists four buttons and the high contrast LCD display with backlight. Thanks to the two-line display, it is possible to set the selected unit, display simultaneously the measuring value and the current time, as well as a clear and user friendly menu with simultaneously visible the parameter name and its value.
Features of the N32P meter:
· Wide range of measured voltages.
· Programmable current range of 1 A or 5 A.
· Possibility to synchronize the zero crossing detector with the current signal.
· High sampling frequency of the measuring signals.
· Wide measuring ranges including high peak of the current values and large values of exceeding the measuring range.
· Programmable parameters of external current and voltage transformers.
· Galvanic separation between the voltage measurement and the current measurement circuits.
· Measurement of voltage and current harmonics.
· High contrast LCD display with built-in backlight.
· Two-line display.
· Automatic selection of the unit of the measured (displayed) value.
· Measuring value preview mode.
· Possibility to simultaneously display two selected measuring quantities or a measuring quantity and e.g. a unit or time.

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· Programmable display precision with the function of automatic setting of the decimal point and the multiplier (kilo, mega) displayed with the unit.
· Possibility to program the measuring range (narrowing) for the selected displayed value.
· Additional measurement of minimum and maximum values during the moving window, with the possibility of programming one of these values to be displayed as the main one.
· Selection of the period and averaging method with the possibility of synchronizing the average value with the built-in real-time clock.
· Programmable alarms with the functions of programmable delays of alarm activation and deactivation, triggered by a specific controlling value. Up to 4 relays, including up to 3 relays with a switching contact. Possibility to configure each of the alarms to work in a selected mode and to react to any measuring quantity including the current time.
· Possibility to control the alarm outputs (relay) via the RS-485 interface.
· Programmable standard analog outputs enabling the retransmission of a selected measuring quantity or a selected parameter. Freely programmable output type and conversion range.
· Built-in by default RS-485 interface with MODBUS RTU protocol support.
· Built-in real-time clock with a built-in automatic change of DST and inversely. The clock can be a parameter which controls the alarms and the value of the analog output signal.
· Possibility to password protect the settings against unauthorized modification.
· Monitoring of set parameters.
· Programmed averaging time - averaging algorithm in a specified time using standard averaging (determining the number of measurements to be averaged) and averaging based on the moving window algorithm with a given averaging time.
· Signaling of alarm operation by highlighting the number of the active alarm.
· Registration of minimum and maximum measuring values.
· Galvanic separation of the connections: alarm, measurement, analog outputs, auxiliary supply outputs, RS-485 interface and supplying input.
· Protection degree from the front IP65.
· Meter overall dimensions 96 x 48 x 100 (with the terminals).

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· The casing is made of a self-extinguishing plastics. · Wide range of supply voltages.

The view of the N32P meter is shown in Fig. 1.

Fig. 1: View of the N32P meter.
2 Meter set
The meter set includes: · Meter N32P 1 pc · Clamps to fix in the panel 4 pcs · Seal 1 pc
3 Basic requirements, operational safety
In terms of a user safety, the N32P meter meets the requirements of the EN61010-1 standard for the devices intended for use in facilities compliant with the third category of installations.
Comments concerning safety
· Assembly and installation of the electrical connections should conducted only by a person authorised and certificated to perform assembly of electric devices.
· Always check the connections before turning the meter on. · The meter is designed to installation and usage in the industrial electromagnetic
environment. · A switch or a circuit-breaker should be installed in the building or facility. The switch

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User's manual

should be located near the device, easily accessible by the operator and suitably marked.
· Removal of the meter electronics during the warranty period voids the warranty.

4 Installation
4.1 Installation method
The N32P meters are designed to be mounted in a panel. Prior to installation a 92 +0.6 x 45+0.6 mm slot must be made in the panel. The maximum thickness of the panel material cannot exceed 6 mm. The meter should be mounted from the front of the panel with disconnected meter connection strips.
Before inserting the meter into the panel check the correct position of the meter seal and make sure that the edges of the panel are not sharp what could damage the seal. After inserting the meter into the slot, mount it with the mounting brackets provided in the meter set (Fig. 2).

Fig. 2: Meter fixing. Electrical connections of the meter should be made with the wires with the cross-section up to 2.5 mm2. Detachable sockets with the plugs of 5.08 mm pitch can be used for the connections.

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Fig. 3: Meter overall dimensions. The external dimensions of the meter are shown in Fig. 3.
4.2 External connection diagram
The N32P meter has three detachable terminal strips to connect the wires of a crosssection up to 2.5 mm2. The view of the meter from the connectors' side is shown in Fig. 5. The upper terminal strip is optional and depends on the accessories of the meter. The circuits of successive groups of the terminals are separated from each other, as shown in Fig. 4.
Fig. 4: Galvanic isolation of the N32P meter.
Note: Unused terminals of the terminal strips (NC) must not be connected to any signals.

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Fig. 5: Signals on the terminal strips. Detailed description of the signals is shown in the table below, and the connection of the measuring signals is shown in Fig. 6.

Terminal

Function

2, 4, 5, 6 Measuring inputs

9, 10, 11 12, 13 15, 16

RS-485 Alarm 1 Power supply

Description
The measuring inputs for connecting the measuring voltage and current or for connecting the external transformers. Examples of the connections are shown in Fig. 6.
RS-485 interface signals
Alarm output 1, which is NO relay contact.
Meter power supply connection. Range of supply voltages supported by the meter depends on the ordering code. It is required to check if the rated range of the meter corresponds to the installation to which the meter will be connected before installing the meter.

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20...28 30...33

Alarms 2, 3, 4 (optional)
Analog output

34, 35 Binary output
3, 7, 14, NC 29

User's manual

The alarm outputs 2, 3 and 4 use a relay with a switching contact.
Analog output. The output must be properly connected according to the type of output selected in the configuration (voltage or current): the terminals 30 and 31 for the current output or the terminals 32 and 33 for the voltage output. It is not possible to use the voltage and current outputs at the same time - the correct value in accordance with the configuration, will be available only for the selected output type.
Open collector binary output. Pulse output of the imported or exported energy counter.
Unused terminals. Should be left unconnected.

The connection of the basic measured signals is shown below. The N32P meter can also be used to measure only voltage or only current.

Fig. 6: Connection of the N32P meter,

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5 Service
The N32 meter user interface includes an LCD display and the buttons which enable to display the measuring value, a full configuration and setting of the meter or modification of the parameters.
After turning the meter on the display shows the name of the meter and the software version. If there is no error during meter initialization process, the meter will switch to displaying the measuring value. If during the initialization any irregularities or deviations are detected, than a message with information about a detected error will be displayed (see point 6 - Error codes).
5.1 Description of the frontal plate
View of the front panel of the meter is shown in Fig. 6. The LCD display with backlight and 4 buttons are on the front panel. The description of the display fields is shown below. The button functions are shown in the section 5.2.

Fig. 7: Front panel of the meter.

Designation

Description

The upper (main) line of the display has 6 characters used to display a

measuring value or a parameter value during the meter configuration.

The lower (auxiliary) line of the display has 5 characters used to display a

measuring value, not converted by the individual characteristic or,

according to configuration, a unit or current time.

The kilo symbol means that the displayed value is divided by a thousand,

e.g. when the setting is displayed, the illuminated symbol means that the

given value is a thousand times greater. For example, 1.2 kA means 1200

Measuring value averaging indicator. Illuminated averaging indicator

informs that the set measuring value averaging period has not elapsed yet.

The mega symbol means that the displayed value is divided by a million,

e.g. when the setting is displayed, the illuminated symbol means that the

given value is a million times greater. For example, 3.5 MW means

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ALI B1...B4

3,500,000 W.
Alarm status field. This field contains the indicator informing about the alarm status. Illuminated alarm indicator means that an alarm event is in progress and the relay corresponding to the alarm is activated. Flashing symbol means that the alarm state is saved (if the alarm memory is activated).
Meter operation buttons. The description of the button functions and their various combinations are shown in section 5.2.

The lower line of the display can be configured to display the unit, where the unit is automatically adapted to the displayed value of measured quantity and depends on set indication range. For example, if a transformer with a rated range greater than 1000 A is connected, the current will be displayed in kilo amperes (kA).
Additionally, the lower line can display a selected value of measured quantity (measured or calculated quantities) or the current time.

5.2 Buttons' functions
Cancel button:
· Exiting the menu and exit to the main screen. · Exiting a lower level of the menu and return to a higher level. · Canceling changing the set value (when editing the parameter value) · Entering the measuring value preview mode - hold down the button for
at least 3 seconds.
Digit change button:
· Navigating the menu - decreasing the items of the menu. · Decreasing the controlled quantity while editing a parameter and
setting selection from the list of settings, e.g. alarm type.
· Changing the controlled digit when setting numerical parameters. · Pressing the button during a normal operation displays a minimum
value for 2 seconds, then the display returns to displaying a measuring value.
Increase value button:
· Navigating the menu - increasing the items of the menu. · Increasing the value of the selected parameter or increasing the value
of a digit when changing the numerical value.
· Pressing the button during a normal operation displays a maximum value for 2 seconds, then the display returns to displaying a measuring value.

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Confirm button:

· Entering the programming mode (holding down the button for at least 3 seconds).
· Navigating the menu - entering the parameter value editing mode or entering the selected lower level of the menu.
· Accepting the changed parameter value.
· Viewing the measuring values in the preview mode.

Deleting minimum value. DELMIN message is displayed after deleting. To avoid accidentally exit the menu in the preview mode, it is recommended to press first

the button

, and then the button

DELMIN message is displayed.

and holding them until

Deleting maximum value. DELMAX message is displayed after deleting. To avoid accidentally exit the menu in the preview mode, it is recommended to

press first the button

, and then the button

until DELMIN message is displayed.

and holding them

Deleting alarm memory - hold down the buttons for 3 seconds. ClrAL message will be displayed after deleting alarm memory.

All the events of deleting of saved minimum, maximum values and alarm activation memory are indicated by the meter by displaying an appropriate message.

5.3 Programming meter parameters
Programming meter parameters is possible via the RS485 interface and by direct edition of the parameters using the buttons and the meter display.

Direct programming process is easy thanks to meter menu, which includes the settings

grouped into sections with all parameters related to a given functionality, e.g. all

parameters of the serial interface are grouped in the menu

Pressing and holding the confirm button for at least 3 seconds allows to switch from a

normal operation to meter menu

. If access to change the parameters is password

protected, the user will be requested to enter the access password before entering the

menu. Entering an incorrect password will allow to enter the menu but it will be not

possible to change the parameters - parameters monitoring mode. Entering a correct

password will allow to move to a programming matrix, the menu after entering the

programming mode is shown below.

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Fig. 8: View of meter menu. While navigating the meter main menu with the groups of the parameters, the upper line of the display shows the name of the group and the lower line continuously displays the word MENU. After entering the group of the parameters (after pressing the confirm button), the upper line displays the value of a given setting and the lower line shows the name of the parameter which value is displayed in the upper line. Sample view of the selection of the measured input signal type is shown in Fig. 9.
Current value of a setting

Parameter which can be configured

Fig. 9: View of menu when setting a parameter.

The buttons

allow to navigate the menu of the meter. After selecting the

group of the parameters which configuration is to be changed, press the confirm button to

move to the parameters of the group. The parameter which value is to be modified is

selected the same way as the selection of the group. To cancel the parameter change,

press the cancel button

to exit the parameter changing mode or the parameter

group. The meter will automatically exit the programming mode and return to displaying

the measuring value if no button is pressed for 30 seconds during programming. The

programming matrix is shown below.

Voltage measuring range selection.

Current

Selection of the

measurement range synchronization

selection

source

Rated voltage of the Rated voltage of the

voltage transformer voltage transformer

primary

secondary

Rated voltage of the current transformer primary

Rated voltage of the current transformer secondary

Single measurement time as a multiple of 100 milliseconds.

Selection of measuring quantities values averaging method (standard or moving window method).

Measuring quantities values averaging period in minutes.

Averaging synchronization with the time clock.

Value entered into Value entered into Pulse weight on a

the import energy the export energy binary output

counter when

resetting the counter. resetting the counter.

Selection of the counter controlling the binary output

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Reset (enter initial value) energy counter.

Selection of main displayed value.

Minimum value on the display. For values lower than this value, a lower overrun message is displayed.

Maximum value on the display. For values higher than this value, an upper overrun message is displayed.

Resolution - position of the decimal point.

Function of a lower line of the display selection of a quantity displayed in the lower line.

Selection of quantity Selection of alarm Alarm state change Alarm state change Alarm activation

controlling the alarm type.

lower threshold.

upper threshold.

delay.

state.

Alarm deactivation Active alarm

delay.

memory.

Meter network address.

Transmission frame Baud rate. type - data format.

Selection of the type Selection of value

of analog output

controlling the

used.

analog output.

Value of the

Value on the analog

controlling quantity controlling quantity output in case of

for which the output for which the output manual control or an

will have a minimum will have a rated

error on the

value, in accordance value, in accordance measuring input.

with the selected

output type.

Current time according to the internal clock.

Current date according to the internal clock.

Automatic change of Password to protect Restore default

DST and inversely against settings

settings

modification.

5.3.1

How to change quantity of a selected parameter

To increase the value of the selected parameter, press the button

. Pressing the

button will increases the currently set digit by 1 and after reaching the value 9, pressing

the button will set the value 0. After setting the required value of a digit, move to the next

digit by pressing the button

. After setting the required parameter value, press the

confirm button

to accept the entered value or the cancel button

to cancel

the parameter change and return to the previous value of the parameter. It is possible to

change a sign of the entered value during setting the last digit (most significant).

There are three steps to change the floating point values. The first step is to set the digits and a sign in accordance with the algorithm described above. The second step is set the position of the decimal point after pressing the confirm button. The buttons are used to set the position of the decimal point. After setting the decimal point position as required, press the confirm button to move to the third step - setting the multiplier of kilo, mega or no multiplier. Symbol of the multiplier value is shown on the left side of the

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display.

Entering an incorrect value of a given parameter causes that the new value is not accepted and the parameter will automatically have the previous value.

To change the parameters other than numerical select the appropriate setting from the

parameter list using the buttons

. After selecting the appropriate setting,

press the confirm button

to download the setting or the cancel button

return to the previous value and exit the parameter change mode.

5.3.2 Programmable meter parameters, default parameters
The N32U meters have a number of programmable parameters, which enable the meter to be adapted to the requirements of application. The parameters grouped according to the menu are shown in the tables below.
Table 1

Parameter symbol

Description

Range of changes

Voltage measurement range in voltage measurement loop

Default : 230V
100V rated measurement range 100 V 230V rated measurement range 230 V 400V rated measurement range 400 V

Current measurement range in current measurement loop

Default : 5A
1A rated current measurement range 1 A 5A rated current measurement range 5 A Default : SYN U

Selection of the measurement synchronization source - the quantity controlling the zero crossing detector

SYN U measurement synchronization with measuring voltage. SYN I measurement synchronization with measuring current.
Note: The measurement synchronization with measuring current is recommended only when the meter is used only for current measurement, because the current waveform has higher variability and the current waveform may be highly distorted.

Default : 100

0...200000

Rated primary voltage of the connected voltage transformer in volts

Note: UPRIM and USEC define the voltage ratio that directly affects the measuring values of the parameters measured by the meter. The parameters UPRIM and USEC should be set to the same value, if the voltage transformer is not used in the system.

Rated secondary voltage of the connected voltage transformer in volts

Default : 100 0...200000

Rated primary current of the connected current Default : 5 transformer in amperes
0...200000

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Note: IPRIM and ISEC define the current ratio that directly affects the measuring values of the parameters measured by the meter. The parameters IPRIM and ISEC should be set to the same value, if the current transformer is not used in the system.

Rated secondary current of the connected current transformer in amperes

Default : 5 0...200000

Time of a single measurement as a multiple of Default : 10

100 ms

1...600

Method of calculating the average value

Default : MOVING MOVING the average values of voltage, current and power are calculated based on a moving window method, where the average value is updated after each measurement. Note: The average value can be updated every few measurements in case of long averaging times or short measurement time, due to the length of the measurement table with maximum of 1800 elements. StAnd the average value is calculated after each lapse of set averaging time. The previous average value (for the previous period) is displayed until the averaging time is completed.

Averaging period of the measured voltage, current and power values in minutes.

Default : 15 1...60 Default : OFF

Synchronization of counting the average value with the internal time clock.

OFF Synchronization is disabled. ON Synchronization internal real time clock is enabled. This setting takes effect only if the set averaging period is 60 minutes divider, e.g. 10, 15, 20, etc.

Initial value of the import energy counter. The Default : 0

value is assigned to the energy counter during

a reset/setting the counter.

-99999E+6...999999E+6

Initial value of the export energy counter. The Default : 0

value is assigned to the energy counter during

a reset/setting the counter.

-99999E+6...999999E+6

Pulse weight in kWh, portion of an energy corresponding to one pulse on the binary output. The EP W value determines at what change of the energy counter one pulse will be assigned to the binary output.

Default : 1 0.001...999999 [kWh]

Default : EN_POS

Selection of the energy counter controlling the binary output.

EN POS pulse output represents counting energy by the import energy counter. EN POS pulse output represents counting energy by the export energy counter.
Default : OFF

Reset / set energy counter

OFF Do nothing ON Reset a counter. The parameter is automatically set to OFF after resetting the counter (setting the values from ERV P and ERV N parameters); during the reset, content of the active energy counters is set based on ERV P and ERV N parameters, and the reactive and apparent energy counters are reset.

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17 Table 2

Parameter symbol

Description

Range of changes

Default : U

Selection of the main value displayed on the top line of the display.

U currently measured voltage value. I currently measured current value. P currently measured active power value. Q currently measured reactive power value. S currently measured apparent power value. PF power factor as the P/S power ratio calculated based on the power triangle. tAN angle tangent as the Q/P power ratio calculated based on the power triangle. FREQ currently measured frequency. En P import energy counter. En N export energy counter. En QC import reactive energy counter which has flowed through the circuit - it is the absolute value (module) of reactive energy counter. En QC export reactive energy counter which has flowed through the circuit - it is the absolute value (module) of reactive energy counter. En S apparent energy counter which identifies the actual energy demand of the circuit. AVG U voltage mean value in a given averaging period. AVG I current mean value in a given averaging period. AVG P active power mean value in a given averaging period. AVG Q reactive power mean value in a given averaging period. AVG S apparent power mean value in a given averaging period. MIN U voltage minimum value in a given averaging period. MAX U voltage maximum value in a given averaging period. MIN I current minimum value in a given averaging period. MAX I current maximum value in a given averaging period. MIN P active power minimum value in a given averaging period. MAX P active power minimum value in a given averaging period. MIN Q reactive power minimum value in a given averaging period. MAX Q reactive power minimum value in a given averaging period. MIN S apparent power minimum value in a given averaging period. MAX S apparent power minimum value in a given averaging period.

Display narrowing lower threshold. If the value to be displayed is below the threshold, the lower limit symbol is displayed
.

Note: The averaging period is defined by AVGPE setting. Default : -99999 -99999M...999999M

Display narrowing upper threshold. If the value to be displayed is above the threshold, the upper limit symbol is displayed
.

Default : -99999 -99999M...999999M

Resolution, display format as the position of the decimal point.

Default : 0000.00
000000 00000.0 0000.00 000.000 00.0000

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Selection of the parameter displayed in the lower line of the display.

0.00000 AUTO automatic position of the decimal point for maximum possible resolution.
Default : UNIt
UNIt unit U currently measured voltage value. I currently measured current value. P currently measured active power value. Q currently measured reactive power value. S currently measured apparent power value. PF power factor as the P/S power ratio calculated based on the power triangle. tAN angle tangent as the Q/P power ratio calculated based on the power triangle. FREQ currently measured frequency. En P import energy counter. En N export energy counter. En QC import reactive energy counter which has flowed through the circuit - it is the absolute value (module) of reactive energy counter. En QC export reactive energy counter which has flowed through the circuit - it is the absolute value (module) of reactive energy counter. En S apparent energy counter which identifies the actual energy demand of the circuit. AVG U voltage mean value in a given averaging period. AVG I current mean value in a given averaging period. AVG P active power mean value in a given averaging period. AVG Q reactive power mean value in a given averaging period. AVG S apparent power mean value in a given averaging period. MIN U voltage minimum value in a given averaging period. MAX U voltage maximum value in a given averaging period. MIN I current minimum value in a given averaging period. MAX I current maximum value in a given averaging period. MIN P active power minimum value in a given averaging period. MAX P active power minimum value in a given averaging period. MIN Q reactive power minimum value in a given averaging period. MAX Q reactive power minimum value in a given averaging period. MIN S apparent power minimum value in a given averaging period. MAX S apparent power minimum value in a given averaging period. clock current time.
Note: The averaging period is defined by AVGPE setting.

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Parameter symbol

Table 3

Description

Range of changes

Default : U

Input value controlling the alarm.

Note: The averaging period is defined by AVGPE setting. Default : H-oFF

Alarm type (see section 5.4.3)
Alarm state change lower threshold.
Alarm state change upper threshold.
Alarm activation delay - the duration in seconds of the alarm state before activating the alarm relay. Alarm deactivation delay - the duration in seconds the state without the alarm before deactivating the alarm relay. Alarm signalization latch. When the function is enabled, after the alarm event ends, the display indicator informing about the alarm status will be flashing signaling the alarm until it is canceled by a combination of buttons
or via the RS-485 interface.

n-on normally enabled n-oFF normally disabled on enabled oFF disabled H-on permanently enabled (manually) H-oFF permanently disabled (manually) REG the state controlled by the MODBUS protocol register.
Default : 10 -99999...999999
Default : 20 -99999...999999
Default : 0 0...900
Default : 10 0...900
Default : OFF
ON alarm memory is activated. OFF alarm memory is deactivated.

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20 Table 4

Parameter symbol

Description
MODBUS network meter address

The transmission frame type of RS-485 interface. Setting the parity bits and the number of stop bits.

RS-485 interface baud rate.

Range of changes
Default : 1
1...247
Default : F8N1
F8N1 F8N2 F8O1 F8E1
Default : 9.6k
2.4k 2400 b/s 4.8k 4800 b/s 9.6k 9600 b/s 14.4k 14400 b/s 19.2k 19200 b/s 28.8k 28800 b/s 38.4k 38400 b/s 57.6k 57600 b/s 115.2k 115200 b/s

Table 5

Parameter symbol

Description

Range of changes

Default : OFF

Selection of the operating mode and the type of analog output used with the option of switching off the output and manual setting the output value.

OFF Output support is disabled. 4 20MA current output 4...20 mA. 0 20MA current output 0...20 mA. 0 10V voltage output 0...10 V. MAN I current output. The output value corresponds to the AnMAN setting. MAN U voltage output. The output value corresponds to the AnMAN setting.

Input quantity controlling the analog output

Default : U

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AVG Q reactive power mean value in a given averaging period. AVG S apparent power mean value in a given averaging period. tIME current time.

Note: The averaging period is defined by AVGPE setting.

Displayed (measured) value for which the

Default : 0

analog output will have a rated minimum value,

in accordance with the programmed output

-99999M...999999M

type.

Displayed (measured) value for which the analog output will have a rated maximum value, in accordance with the programmed output type.

Default : 100 -99999M...999999M

Value of the signal on the analog output for

Default : 0

output value manual control.

Note: The value is set on the analog output

0...22

after detecting an error on the measuring input.

The maximum possible signal will be

generated if the value exceeds the maximum

value for a given output type.

Table 6

Parameter symbol

Description

Range of changes

Setting the current time. Confirmation of the time resets the seconds counter.

Default : (not applicable) 00:2359

Setting the current date in YYYY.MM.DD format, where: YY year. MM month. DD day of the month.

Default : (not applicable) 00.01.01...99.12.31

Default : OFF

Automatic change of DST and inversely

OFF automatic time change disabled. ON automatic time change enabled.

Password to access the meter configuration. When the set value is different from zero, each attempt to enter the menu of the meter will require entering a password. In case of providing an incorrect password, it will be possible to enter the menu in the monitoring mode without a possibility of make any changes.

Default : 0 0...9999

Restore default settings. Selecting YES setting will restore all settings to the default settings and set FACt setting to NO.

Default : NO
NO do nothing. YES restore default settings (factory).

5.4 Meter functions

5.4.1

Measurement

The N32P meters continuously measure RMS voltage, current and power. They calculate energy, power factor and power tangent based on the measured values. Both, the power factor value and the power tangent are calculated based on the power triangle. Additionally, the voltage frequency is measured during the measurements which is determined by the zero crossing detector. The detector input can be connected to the input voltage or the current loop via SYNCH setting, and the measurements with a current

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synchronization should only be selected if the meter is used only for current measurement.

Sampling is 8,000 measurements per second. The measuring periods (input signal period) are synchronized with the signal from the internal zero crossing detector. A single measurement is made for the number of periods corresponding to a time of 100 ms. Realtime measurement may slightly differ from the assumed 100 ms due to the measuring signal frequency value. A single measurement time would correspond to 5 periods of the measuring signal at 50 Hz. The user can define the duration of the measurement time by providing the number of single measurements. By default, the measurement time is defined as 10 basic measurements, i.e. one second. When changing the measurement time, it needs to be considered that the shorter the measurement time, the greater the influence of noise on the measuring value, and therefore the lower the stability of indications.

The measuring values are continuously analyzed during averaging, and additionally, the minimum and maximum measuring values are determined during the averaging period, as well as the total minimum and maximum measuring values, which are saved in the nonvolatile memory of the meter.

All measuring parameters are available via the RS-485 interface, including the basic measuring values e.g. voltage on the shunt.

The main displayed value can be limited by the user by specifying the minimum and maximum displayed value. Exceeding set lower threshold of the measurement (the measuring value lower than the set limit value) causes to display information about exceeding the lower limit, and exceeding set upper threshold of the measuring range (measuring value greater than the set limit value) causes to display information about exceeding the upper limit.

All the values of measuring quantities are available through the RS-485 interface and at

the parameter preview level. Entry a measuring value preview mode can be done by

pressing for at least 3 seconds the cancel button

. The currently displayed value

can be changed by pressing the confirm button

. When previewing the measuring

values, its value is displayed in the upper line and the lower line alternately displays the

parameter name and its unit. Additionally, it is possible in the value preview mode to check

the minimum and maximum values of a given quantity, and to delete them (see section

5.4.1.2). The meter will return to the normal operation if no button is pressed for 30

seconds (the main displayed value defined in the configuration will be displayed).

5.4.1.1 Averaging the measuring quantities
The measuring values are averaged in two stage process. The first stage of averaging the arithmetic mean is calculated from the indicated number of measurements defined by SAVGt parameter. The parameter also determines the time of a single measurement - one measurement takes 100 ms of time, then for the SAVG parameter set to 10, the time of a single measurement will be one second. There is a single measurement that represents

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User's manual

the current measuring value after the first stage of averaging.

Additionally, the average value is calculated for each of the measuring parameters, and the averaging period is defined by the user by defining AVGPE parameter in minutes. The average value can additionally be synchronized with the internal time clock. The method of calculating the average value is defined by the user - AVGtY parameter, which can be selected from the standard averaging method, where the new average value is calculated after the averaging time has finished, or the moving window method, where the average value is calculated continuously from a selected period of time, e.g. for the setting of 15 minutes, the average value represents the average value over the last 15 minutes and is continuously updated. In the given example, if the synchronization is enabled, the average value is calculated from every quarter of an hour, i.e. the minutes of the clock 0, 15, 30, 45 indicate a new averaging period.

The buffers for average value calculation have a length of 600 single measurements, and each of the averaged values has a separate data buffer, therefore the average value calculated by the moving window method can be updated less frequently than it would result from the time of a single measurement. For example, for the averaging period of 60 minutes and a single measurement time of 1 second, the average value will be updated every 6 seconds because in this case the buffer length would have to be 3600 measurements. For the buffer with a length of 600 measurements, each element in this case contains a value of averaging six single measurements.

5.4.1.2 Minimum and maximum measuring values
The N32 meter continuously measures the signal on the measuring inputs and calculates the derived parameters, e.g. power factor. The measuring values are constantly monitored, if the measuring range is not exceeded during the measurement. If any of the values is smaller than the current minimal value of a given parameter, then the new minimal value is saved. When the measuring (displayed) value is higher than the current maximum value of a given parameter, then the new maximum value is saved. The minimum and maximum values are available via the interface and from the panel of the meter. Press the button
to display the minimum value of the main displayed value. Press the button to display the maximum value. Value minimum / maximum is displayed for 2 seconds, then the meter automatically returns to displaying the measuring value.

Reset of the minimum / maximum value can be done via the interface or directly using the

meter keypad. Press a combination of buttons

to reset the minimum value,

and press a combination of buttons

to reset the maximum value. Each reset

of the minimum or maximum value using the buttons is confirmed by a message - an

example the message is shown below.

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User's manual

Fig. 10: The message after resetting the maximum value.

To display the minimum and maximum value of the parameters which are not displayed

continuously on the display is possible from the measuring value preview menu - to access

the menu press and hold the cancel button

for at least 3 seconds. Changing the

currently indicated quantity after entering the preview menu can be done by pressing the

confirm button

. The minimum and maximum value for a given parameter can be

displayed or deleted in the same way as the main displayed value, but to avoid

accidentally exit the menu, it is recommended to press one of the buttons first

, and then the button

5.4.2 Analog output
The N32P meters can have one analog output (depends on the ordering code) connected to the meter terminals as a voltage output (0...10 V output) and as a current output (0...20 mA or 4...20 mA). The analog output is galvanically separated from the other meter circuits. Selection of the output type to be used can be done during the output configuration. It is not possible to use the voltage and current output at the same time because it is physically one output with two signals connected to the terminals. It is very important when using an output to choose the type of it that is actually being used. Otherwise, the output value will not match the expected output signal.

The following parameters should be defined during the output configuration:

type of output signal that will be used. Additionally, the manual

operation modes are available (separate for the voltage output and for the current output), where AnMAN setting defines the exact expected value on the analog output.

setting which defines the quantity that will control the analog output

signal.

lower value of the control signal in accordance with InPV parameter,

which the minimum signal value on the analog output corresponds to.

upper value of the control signal in accordance with InPV parameter,

which the maximum (rated) signal value on the analog output corresponds to.

the parameter has two applications. First, it is the value of the signal

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User's manual

(voltage or current) during a manual control of the output. Second, to use a set value when the signal controlling the output has an incorrect value, e.g. exceeded measuring range. In such case the signal on the output will be set according to this setting.

Thus, configuration of the output requires to specify five parameters. An example of an output configuration is shown below.

Let's assume that the input signal is power and the measuring range will be 500 W and for such range the output should change between 4 ... 20 mA. The settings for such case should be as follows:

· AtYPE = 4 20MA.

· InPV = P.

· AnLo = 0.

· AnHi = 500.

· AnMAN = 22. The value on the analog output will be 22 mA in case of a measurement error.

5.4.3

Alarm outputs

The N32P meters are equipped with one alarm output as standard. They can have 4 alarm outputs as an option, including three outputs with a switching contact. The alarm output element are electro-magnetic relays. If the meter is physically equipped with one alarm, 4 alarms are still available in the meter menu. In this case, the alarms 2 to 4 can have a indication functions by controlling the alarm indicator on the screen and via the RS-485 interface (alarm states in the meter registers).

Each alarm output is independently configurable and can be configured to work in one of six modes. It is possible to select the value controlling the alarm (see Fig. 9), define the state change thresholds and define the delays of alarm activation and deactivation. Fig. 11 shows how the alarms work in n-on, n-off, off and on modes. Additional manual working modes H-on and H-oFF enable to permanently activate or deactivate the alarms. An additional REG operation mode has also been added to the alarm type settings. In this mode, the alarm state is controlled via the RS-485 interface by MODBUS protocol registers.

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Fig. 11: Alarm types: a) n-on; b) n-off; c) off; f) on.
Designations used in the drawing:
· AL_L corresponds to PrL setting and determines the alarm state change lower threshold.
· AL_H corresponds to PrH setting and determines the alarm state change upper threshold.
Note: It is important to keep in mind when configuring the alarms that the entered threshold values should match the dependency AL_L < AL_P. Otherwise the dependency will disable the alarms. Additionally, the alarm functions include the programmable delays of alarm activation and deactivation. The user can define how long the alarm event must last before the alarm relay contacts are switched on and the minimum time of the alarm event end before the relay contacts are switched off. Alarm delays prevent false alarms caused by a short-term change of the measuring value, e.g. during the start-up. The alarm event could be registered if the alarm memory is enabled.
5.4.4 Binary output
The N32P meters can have a galvanically separated optional binary output, which is designed to generate pulses corresponding to the counting of a given portion of energy by the energy counter. Pulse weight (the amount of counted energy per one pulse and a control counter) is user-defined. This output can be used to transfer information to subsequent counters or PLC controllers, etc. The binary output has an NPN transistor as the output, its collector and emitter are

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User's manual

connected to the output terminals what enables to work with the inputs of the meters supporting the NPN and PNP sensors.
Duration of each generated pulse is 30 ms followed by a pause of also 30 ms. It is important to pay attention to pulse duration during a configuration of the binary output (pulse weight) because too many generated pulses may overflow the internal pulse counter, and consequently, the number of generated pulses will be lower than expected.
The examples of connecting a binary output to a counter in input configuration for NPN (b) as well as PNP (a) sensors are shown below.

Fig. 12: An example of connecting a binary output to a PLC controller.
The figure above shows the examples of connecting the binary output of the N32P meter to a PLC controller. The diagram in Fig. a shows the controller input to work with PNP sensors, while Fig. b shows a diagram for the controllers to work with NPN sensors.
5.5 RS-485 interface
The N32P meters are equipped as a standard with one RS-485 port connected to the terminals of the lower connector. The interface is galvanically separated from the other circuits of the meter. The implemented data exchange protocol is compatible with MODBUS RTU standard and allows to save and read all configuration parameters as well as read all measurement data with data including alarm status, current time, date or other parameters related to the meter status. The transducer works in the network as a slave device. Standard RS-485 allows a direct connection up to 32 devices on a single serial link. The maximum permissible cable length depends on a baud rate, and it is 1200 m for the baud rate 9600 b/s. It is necessary to use additional intermediate-separation circuits e.g. PD51 by LUMEL S.A. to connect more devices or to use a longer connections.
5.5.1 Connection
The terminals A, B and GNDI terminals which location is shown in Fig. 5 allow to connect

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User's manual

the RS-485 interface to the N32P meter. It is required to connect the lines A and B in parallel with their equivalents in other devices to obtain the correct transmission.
The connection should be made using twisted pair screened cable in such a way that the A and B lines should be one pair and are connected with their equivalents of other devices in the network. The cable shield should be connected to the protective terminal in close proximity to the N32P meter. The cable shield of the interface cable should be connected to the protective terminal only in one point.
The GNDI line, which is the reference potential for the RS-485 interface, is used for additional protection of the interface line at long connections. Then all GNDI lines of all devices using the same bus should be connected together. A star connection should be avoided when connecting the devices. The connection should have a bus layout which ends are connected to the termination resistors.
Method of connecting the devices is shown in Fig. 12.

Fig. 13: Connecting the RS-485 interface.
5.5.2 Description of the MODBUS protocol implementation.
The implemented protocol is compliant with the PI-MBUS-300 Rev G specification of Modicon.
It is important to keep in mind when configuring the parameters that the devices using the same bus must meet the following requirements:
· Have a unique address, different from the addresses of other devices connected to the network.
· The same baud rate. · The same type of transmission mode (single data frame format). The N32P meters enable programming the following parameters of the RS-485 link:

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User's manual

· Meter address: 1...247.

· Baud rate: 2400, 4800, 9600, 14400, 19200, 28800, 38400, 57600, 115200 [b/s].

· Operation mode: RTU frame format 8n1, 8n2, 8o1, 8e1.

· Maximum response time: 50 ms.

5.5.3 Implemented functions of MODBUS protocol
The following functions of the MODBUS protocol have been implemented in the N32H meters:

· 03 (03h) readout of registers group.
· 04 (04h) readout of input registers group.
· 06 (06h) single register writing.
· 16 (10h) registers group writing.
· 17 (11h) slave device identification.
5.5.4 Map of the registers
The register map of the N32P meter is divided into separate groups of 16-bit or 32-bit registers. Data stored in 32-bit registers are additionally available in the format of 16-bit registers, with the value of one 32-bit register is stored in two 16-bit registers.
The 32-bit registers store data in the float format compliant with IEEE-754. Bytes sequence: B3 B2 B1 B0 the oldest byte is transmitted as the first. The 16-bit registers representing 32-bit values in two successive registers have been doubled in another address space with a byte sequence: B1 B0 B3 B2.

The table below shows the register map of the N32P meter. The addresses in the table are the physical addresses. The register number should be increased by 1 when using the programs where the addresses are provided in a logical format.

Address range 3000 3127
4000 4056 4200 4261 7500 7559
7600 7619
7000 7119
7200 7239

Value type

Description

16 bits Readout only registers - calculated values of current and voltage harmonics.

16 bits Readout and write registers - configuration registers

16 bits Readout only registers with system parameter values

32 bits Readout only registers with measuring and calculated values. (float)

32 bits Readout and write registers - registers with configuration data. (float)

16 bits Readout only registers. Registers store the same data as the registers 7500-7559, where one value is stored in two successive registers.

16 bits Readout and write registers. Registers store the same data as the registers 7600-7614, where one value is stored in two successive registers.

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5.5.4.1 Registers 3000 3127

Address Permissible values

3000 3001
: 3050 3051...3063

0...65535
0...65535 0...65535
: 0...65535

3064 3065
: 3114 3115...3127

0...65535
0...65535 0...65535
: 0...65535

Unit
% * 100 % * 100 % * 100
: % * 100
% * 100 % * 100 % * 100
: % * 100

Description Voltage harmonics Main voltage harmonic - value expressed as a percentage multiplied by 100. Second voltage harmonic Third voltage harmonic : Fifty first voltage harmonic Reserved Current harmonic Main current harmonic - value expressed as a percentage multiplied by 100. Second current harmonic Third current harmonic : Fifty first current harmonic Reserved

5.5.4.2 Registers 4000 4054
16-bit readout and write configuration registers.

Address 4000
4001 4002 4003 4004 4005

Permissible values Default

Description

Measurement, display and protection of configuration

Voltage measuring range

Value Rated range (measuring range)

0...2

0 100 V (120 V)

1 230 V (280 V)

2 400 V (480 V)

Current measurement range

Value Rated range (measuring range)

0, 1

0 1 A (1.2 A)

1 5 A (6 A)

Selection of the measurement synchronization

Value Description

0, 1

0 Synchronization of measurements with voltage

1 Synchronization of measurements with current

1...600

Number of measurements to be averaged. The value specifies a

multiple of 100 ms. The measurement after averaging is considered as

a single (basic) measurement.

Method of calculating the measurements average value.

Value

Description

0, 1

0 Moving window method.

1 Arithmetic mean - a standard method.

1...60

Measuring values averaging period in minutes.

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4006

0, 1

4007

0, 1

4008

0...27

4009

0...6

User's manual

Averaging period synchronization with the real time clock. The parameter is applicable only if 60 minutes is a multiple of the averaging time.

Value

Format

0 Synchronization disabled

1 Synchronization enabled

Selection of the counter controlling the binary output (pulse).

Value Description 0
0 Import energy counter

1 Export energy counter

Selection of the main value displayed on the display.

Value Description

Voltage measuring value.

Current measuring value.

Active power measuring value

Reactive power measuring value.

Apparent power measuring value

Power factor value (angle cosine of the power triangle).

Power tangent value.

Frequency of the measured signal.

Import energy counter.

Export energy counter.

10 Transferred import reactive energy counter.

11 Transferred export reactive energy counter.

12 Apparent energy counter. 0
13 Voltage mean value.

14 Current mean value.

15 Active power mean value.

16 Reactive power mean value.

17 Apparent power mean value.

18 Voltage minimum value in an averaging period.

19 Voltage maximum value in an averaging period.

20 Current minimum value in an averaging period.

21 Current maximum value in an averaging period.

22 Active power minimum value in an averaging period.

23 Active power maximum value in an averaging period.

24 Reactive power minimum value in an averaging period.

25 Reactive power maximum value in an averaging period.

26 Apparent power minimum value in an averaging period.

27 Apparent power maximum value in an averaging period.

Displayed precision - position of the decimal point.

0 000000

1 00000.0

2 0000.00

3 000.000

4 00.0000

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4010

0...29

4011

0...9999

4012

0...5

User's manual

5 0.00000

6 Automatic - the position of the decimal point is set for maximum resolution.

Contents of the bottom line of the display

Value

Description

Unit of main displayed value.

Voltage measuring value.

Current measuring value.

Active power measuring value

Reactive power measuring value.

Apparent power measuring value

Power factor value (angle cosine of the power triangle).

Power tangent value.

Frequency of the measured signal.

Import energy counter.

10 Export energy counter.

11 Import reactive energy counter.

12 Export reactive energy counter.

13 Apparent energy counter. 0
14 Voltage mean value.

15 Current mean value.

16 Active power mean value.

17 Reactive power mean value.

18 Apparent power mean value.

19 Voltage minimum value in an averaging period.

20 Voltage maximum value in an averaging period.

21 Current minimum value in an averaging period.

22 Current maximum value in an averaging period.

23 Active power minimum value in an averaging period.

24 Active power maximum value in an averaging period.

25 Reactive power minimum value in an averaging period.

26 Reactive power maximum value in an averaging period.

27 Apparent power minimum value in an averaging period.

28 Apparent power maximum value in an averaging period.

29 Current time

Access protection code to make changed in the configuration using the

meter menu. It would be required to provide a code each time when

entering the meter menu in case of entering a value higher than zero.

Analog output

Analog output mode.

Value

Description

0 Output disabled.

1 Output in operating mode 4...20 mA.

2 Output in operating mode 0...20 mA.

3 Output in operating mode 0...10 V.

4 Current output controlled manually.

5 Voltage output controlled manually.

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4013

0...20

4014

1...247

4015

0...3

4016

0...8

4017

0, 1

4018

0...20

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Quantity controlling the analog output signal

Value

Description

Voltage measuring value.

Current measuring value.

Active power measuring value

Reactive power measuring value.

Apparent power measuring value

Power factor value (angle cosine of the power triangle).

Power tangent value.

Frequency of the measured signal.

Import energy counter.

Export energy counter.

10 Import reactive energy counter.

11 Export reactive energy counter.

12 Apparent energy counter.

13 Voltage mean value.

14 Current mean value.

15 Active power mean value.

16 Reactive power mean value.

17 Apparent power mean value.

18 Current time

RS-485

RS485 MODBUS network meter address

RS485 data transmission frame type (format)

Value

Frame type

0 8N1 0
1 8N2

2 8O1

3 8E1

RS485 baud rate.

Value

Baud rate [b/s]

0 2400

1 4800

2 9600

3 14400

4 19200

5 28800

6 38400

7 57600

8 115200

RS485 Apply entered settings. Entering the value 1 changes

immediately the settings and resets the register. If the RS-485 interface

parameters have been modified without applying the change, new

parameters will be applied after the meter is turned on again.

Alarm 1

Value controlling the alarm. Significance of the settings as for the

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4019
4020 4021 4022
4023 4024 4025 4026 4027
4028 4029 4030 4031 4032
4033 4034 4035 4036 4037
4038 4039 4040 4041 4042 4043 4044 4045

User's manual

0...6

Alarm type (see section 5.4.3)

Value

Description

0 n-on

1 n-off

2 on

3 off

4 H-on manually disabled

5 H-off manually enabled

6 REG state controlled by the RS-485 interface

0...900

Alarm activation delay in seconds.

0...900

Alarm deactivation delay in seconds.

0, 1

Alarm activation memory. Entering the value 1 enables the function of

the alarm event memory.

Alarm 2

0..20

Value controlling the alarm, as for the alarm no. 1.

0...6

Alarm type, as for the alarm no. 1.

0...900

Alarm activation delay in seconds.

0...900

Alarm deactivation delay in seconds.

0, 1

Alarm activation memory. Entering the value 1 activates the alarm

event memory function.

Alarm 3

0..20

Value controlling the alarm, as for the alarm no. 1.

0...6

Alarm type, as for the alarm no. 1.

0...900

Alarm activation delay in seconds.

0...900

Alarm deactivation delay in seconds.

0, 1

Alarm activation memory. Entering the value 1 activates the alarm

event memory function.

Alarm 4

0..20

Value controlling the alarm, as for the alarm no. 1.

0...6

Alarm type, as for the alarm no. 1.

0...900

Alarm activation delay in seconds.

0...900

Alarm deactivation delay in seconds.

0, 1

Alarm activation memory. Entering the value 1 activates the alarm

event memory function.

Clock setting only. The registers store data of last entered time and date.

0..99

Real-time clock year - value to set the current year.

1...12

Real-time clock month - value to set the current month.

1...31

Real-time clock day - value to set the current day.

0...23

Real-time clock hours - value to set the current hours.

0...59

Real-time clock minutes - value to set the current minutes.

0...59

Real-time clock seconds - value to set the current seconds.

0, 1

Automatic change of DST and inversely Entering the value 1 enables

the function of automatic change of DST and inversely.

0, 1

Apply entered time. Entering the value 1 sets the clock for the time and

date defined in the registers 4038...4043. The register is reset after

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4046

0, 1

4047

0, 1

4048

0, 1

4049

0, 1

4050 4051 4052 4053
4054

0, 1 0, 1 0, 1 0, 1
0...65535

4055

0...65535

User's manual

applying the changes.

Alarms - Control

Alarm 1 - alarm state control for the active alarm in REG mode.

Entering the value 1 activates the alarm. Entering the value 0

deactivates the alarm.

Alarm 2 - alarm state control for the active alarm in REG mode.

Entering the value 1 activates the alarm. Entering the value 0

deactivates the alarm.

Alarm 3 - alarm state control for the active alarm in REG mode.

Entering the value 1 activates the alarm. Entering the value 0

deactivates the alarm.

Alarm 4 - alarm state control for the active alarm in REG mode.

Entering the value 1 activates the alarm. Entering the value 0

deactivates the alarm.

Alarms - Deleting alarm memory

Alarm 1 - delete alarm memory. Entering the value 1 deletes the alarm

event memory.

Alarm 2 - delete alarm memory. Entering the value 1 deletes the alarm

event memory.

Alarm 3 - delete alarm memory. Entering the value 1 deletes the alarm

event memory.

Alarm 4 - delete alarm memory. Entering the value 1 deletes the alarm

event memory.

Additional requests

Reset minimum / maximum of measuring value / measuring values.

Reset request resets the minimum and maximum values, unless there

is no measurement error. Then the reset will be completed after the

error is cleared. The value from the register is retrieved and the

The register is treated as bits, with each bit corresponding to reset of a

different value.

Bit

Description

Reset voltage minimum measured value.

Reset voltage maximum measured value.

Reset current minimum measured value.

Reset current maximum measured value.

Reset active power minimum measured value.

Reset reactive power minimum measured value.

Reset reactive power maximum measured value.

Reset apparent power minimum measured value.

Reset apparent power maximum measured value.

10 Reset power ratio minimum value.

11 Reset power ratio maximum value.

12 Reset power tangent minimum value.

13 Reset power tangent maximum value.

14 Reset frequency minimum measured value.

15 Reset frequency maximum measured value.

Reset minimum / maximum of measuring value / measuring values -

continued.

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4056

0, 1

Bit

Description

Reset/set active import energy counter.

Reset/set active export energy counter.

Reset/set reactive import energy counter.

Reset/set reactive export energy counter.

Reset apparent energy counter.

Restore default settings Entering 1 restores the default settings (default configuration) and resets this register.

5.5.4.3 Registers 4200 4261

Readout only 16-bit registers.

Address
4200 4201 4202 4203 4204 4205 4206 4207 4208
4209 4210 4211 4212 4213 4214
4215
4216 4217 4218 4219
4220 4221 4222

Description

System parameters

Device ID

Software version - version number multiplied by the value 100.

N32 meter type - code corresponding to the "P" character.

Meter serial number - older 16 bits.

Meter serial number - younger 16 bits.

Meter calibration date - older 16 bits.

Meter calibration date - younger 16 bits.

Total meter operation time in seconds - older 16 bits.

Total meter operation time in seconds - younger 16 bits.

Real Time Clock

Current date - year in YY format.

Current date - month.

Current date - day.

Current time - hour.

Current time - minutes.

Current time - seconds.

State of the internal time clock

Value

Description

No clock errors.

Lost time settings.

Clock initialization error - faulty clock.

Clock setting error.

Alarms - alarm event memory

Alarm 1: Value 1 - active mode to register the alarm event. Value zero - no alarm events registered.

Alarm 2: Value 1 - active mode to register the alarm event. Value zero - no alarm events registered.

Alarm 3: Value 1 - active mode to register the alarm event. Value zero - no alarm events registered.

Alarm 4: Value 1 - active mode to register the alarm event. Value zero - no alarm events registered.

Active import energy counter in Ws - 64-bit

The registers store 64-bit content of active import energy counter in Ws (Watt seconds), the register 4220 stores the highest 16-bit of the word and the register 4223 stores the lowest 16-bit of the word.

N32P-09
4223
4224 4225 4226 4227
4228 4229 4230 4231
4232 4233 4234 4235
4236 4237 4238 4239
4240 4241
4242 4243 4244 4245 4246 4247 4248 4249 4250 4251 4252 4253 4254 4255 4256 4257 4258 4259

User's manual

Active export energy counter in Ws - 64-bit
The registers store 64-bit content of active export energy counter in Ws (Watt seconds), the register 4224 stores the highest 16-bit of the word and the register 4227 stores the lowest 16-bit of the word.
Reactive import energy counter in vars - 64-bit
The registers store 64-bit content of reactive import energy counter in Ws (var seconds), the register 4228 stores the highest 16-bit of the word and the register 4231 stores the lowest 16-bit of the word.
Reactive export energy counter in vars - 64-bit
The registers store 64-bit content of reactive export energy counter in Ws (var seconds), the register 4232 stores the highest 16-bit of the word and the register 4235 stores the lowest 16-bit of the word.
Reactive energy counter in VAs - 64-bit
The registers store 64-bit content of apparent energy counter in VAs (volt-ampere seconds), the register 4236 stores the highest 16-bit of the word and the register 4239 stores the lowest 16-bit of the word.
Reserved
Reserved registers.
Status bits - value 1 indicates the occurrence of a given event Communication error with the internal data memory. Corrupted configuration registers from register group 4000. Corrupted configuration registers from register group 7600. Corrupted calibration registers - no calibration. The meter is not calibrated. Archive memory error. Communication error with the analog output module. Measurement module error. Communication error with A/D converter. Voltage range exceeded. Current range exceeded. Voltage measuring value below the lower measuring threshold. Current measuring value below the lower measuring threshold. Power range (voltage or current) exceeded. No signal from zero crossing detector - low signal level in the detector input loop. Loss time - not set RTC clock. Alarm 1 active. Alarm 2 active.

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4260 4261

Alarm 3 active. Alarm 4 active.

5.5.4.4 Registers 7500 7559 and 7000 7119

The 32-bit and the corresponding 16-bit registers with measuring and calculated data. The address entered in the address field is for 32-bit float variables or in the second column for the values stored in two 16-bit registers, where the value stored in two registers is of float type.

Address (32bit float registers)

Address (value in 2 16-bit register
s)

Description

7500 7000 Device ID

7501 7002 Voltage measuring value in [V]

7502 7004 Current measuring value in [A]

7503 7006 Active power measuring value in [W]

7504 7008 Reactive power measuring value in [W]

7505 7010 Apparent power measuring value in [VA]

7506 7012 Power factor cos calculated based on the power triangle

7507 7014 Power angle tangent - tan calculated based on the power triangle

7508 7016 Measuring signal frequency [Hz]

7509 7018 Active import energy [kWh]

7510 7020 Active export energy [kWh]

7511 7022 Import reactive energy [kvarh]

7512 7024 Export reactive energy [kvarh]

7513 7026 Total apparent energy [kVAh]

7514 7028 Harmonic distortion factor of voltage (THD) [%]

7515 7030 Harmonic distortion factor of current (THD) [%]

7516 7032 Voltage mean value [V]

7517 7034 Current mean value [A]

7518 7036 Active power mean value [W]

7519 7038 Reactive power mean value [var]

7520 7040 Apparent power mean value [VA]

7521 7042 Registered voltage minimum value [V]

7522 7044 Registered voltage maximum value [V]

7523 7046 Registered current minimum value [A]

7524 7048 Registered current maximum value [A]

7525 7050 Registered active power minimum value [W]

7526 7052 Registered active power maximum value [W]

7527 7054 Registered reactive power minimum value [var]

7528 7056 Registered reactive power maximum value [var]

7529 7058 Registered active power minimum value [VA]

7530 7060 Registered active power maximum value [VA]

N32P-09

User's manual

7531 7532 7533 7534 7535 7536 7537 7538 7539 7540 7541 7542 7543 7544 7545 7546 7547 7548 7549 7550 7551 7552 7553 7554 7555 7556 7557 7558 7559 7560

7062 7064 7066 7068 7070 7072 7074 7076 7078 7080 7082 7084 7086 7088 7090 7092 7094 7096 7098 7100 7102 7104 7106 7108 7110 7112 7114 7116 7118 7120

Registered power factor minimum value (cos) Registered power factor maximum value (cos) Registered power tangent minimum value (tan) Registered power tangent maximum value (tan) Registered signal frequency minimum measuring value [Hz] Registered signal frequency maximum measuring value [Hz] Voltage minimum value in current averaging period [V] Voltage maximum value in current averaging period [V] Current minimum value in current averaging period [A] Current maximum value in current averaging period [A] Active power minimum value in current averaging period [W] Active power maximum value in current averaging period [W] Reactive power minimum value in current averaging period [var] Reactive power maximum value in current averaging period [var] Apparent power minimum value in current averaging period [VA] Apparent power maximum value in current averaging period [VA] Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Voltage of the backup battery. CPU temperature. Current time in the form of hh.mmss.

5.5.4.5 Registers 7600 7677 and 7200 7355
The 32-bit and the corresponding 16-bit registers with the configuration parameters.

Address (32-

Address

bit float (value in 2 16-

registers) bit registers)

7600 7601 7602 7603

7200 7202 7204 7206

7604

7208

Permissible values Default

Description

Ratio - transformers configuration

0...200,000

100 Voltage transformer - primary voltage

0...200,000

100 Voltage transformer - secondary voltage

0...200,000

5 Current transformer - primary current

0...200,000

5 Current transformer - secondary current

Minimum and maximum displayed value

-99999M...999999M

-99999

Display narrowing lower threshold. If the value to be displayed is below the threshold, the lower limit symbol is displayed.

N32P-09

7605

7210

7606 7607 7608

7212 7214 7216

7609
7610
7611
7612 7613 7614 7615 7616 7617 7618 7619

7218
7220
7222
7224 7226 7228 7230 7232 7234 7236 7238

User's manual

-99999M...999999M

999999

Display narrowing upper threshold. If the value to be displayed is above the threshold, the upper limit symbol is displayed.

Reactive energy

-99999M...999999M

Import active energy value to be written to the energy counter when resetting the energy counter.

-99999M...999999M

The value of exported active energy value to be written to the energy counter when resetting the energy counter.

0.001...999999

1 Pulse weight at the energy output (energy equivalent)

Analog output

-99999M...999999M

The quantity of the value controlling the analog output for 0 which the output will have the minimum value (according
to the output range).

-99999M...999999M

The quantity of the value controlling the analog output for 100 which the output will have the maximum value (according
to the output range).

0...22

The value of the analog output signal for manual operation or during a measurement error at the input.

Alarms alarm state change thresholds

-99999M...999999M

10 Alarm 1 alarm state change lower threshold.

-99999M...999999M

20 Alarm 1 alarm state change upper threshold.

-99999M...999999M

10 Alarm 2 alarm state change lower threshold.

-99999M...999999M

20 Alarm 2 alarm state change upper threshold.

-99999M...999999M

10 Alarm 3 alarm state change lower threshold.

-99999M...999999M

20 Alarm 3 alarm state change upper threshold.

-99999M...999999M

10 Alarm 4 alarm state change lower threshold.

-99999M...999999M

20 Alarm 4 alarm state change upper threshold.

6 Error codes
The N32P meters have several diagnostic functions and settings built-in that allow to limit the displaying. So the display may show and the status registers may store information about the diagnosed error, event or fault. Possible messages and their potential causes are listed below.

Message

Description
Measuring range lower value or the programmed indication range exceeded.

Measuring range upper value or the programmed indication range exceeded.

It is not possible to display the measuring value in the selected resolution - the measurement result does not fit on the display. Lower the display resolution or select the mode of automatic position of the decimal point.
Lost calibration. Please contact the technical support.

N32P-09

User's manual

Lost real time clock settings. The message is displayed only when turning the meter on. Time and date must be set. If the message still appears when turning the meter on after setting the time and date, please contact the Service Department because a backup battery may require to be replaced. This message can be ignored if the clock settings are not significant in a given application.
Measurement module error. It is not possible to make a measurement, please contact the technical support.

Configuration data memory and calibration memory error. It is not possible to use a meter, please contact the technical support.

No communication with the analog output module. Please contact the Service Department.

7 Technical data
Measuring ranges

Type of input / Range

Measuring range (KU=1; KI=1)

Voltage measuring loop

Voltage 100 V

5...120 V

Voltage 230 V

12...280 V

Voltage 400 V

20...480 V

Current measuring loop

Current 1 A

0.05...1.2 A

Current 5 A

0.05...6 A

Power measurement

Active power Reactive power
Apparent power

Actual measuring range for active and reactive power:
-1.2Ur * 1.2Ir... 1.2Ur * 1.2Ir, Apparent power:
0... 1.2Ur * 1.2Ir
where: Ur set voltage measuring range; Ir set current measuring range;

Other measuring parameters

Power factor (cos)

-1...0...1

Power angle tangent

-999.99...-1.2...0...1.2...999.99

Class
0.1
0.2 0.2 0.2 0.5 0.5

N32P-09

User's manual

Active energy

0...9 999 999.9 kWh

0.5

Reactive energy

0...9 999 999.9 kvarh

0.5

Currents and voltages THD

0...100%

Current and voltage harmonics

0...100%

Frequency

35...65...100

0.1

Current time

00.00...23.59

±20 ppm

KU voltage ratio; KI current ratio * - parameters calculated based on the power triangle. Meter accuracy class depends on the accuracy of the active and apparent power measurement. The reactive power is also calculated based on the power triangle.

Measuring loops parameters
Input resistance for voltage measurements
Current measurement using an internal current transformer - test loop resistance
Short-term overload (5s) - voltage inputs - 5 A current input - Current input 1 A
where Un - rated voltage; In rated current

> 3.5 M
< 0.1
2 Un 10 In 50 In

Additional measurement errors Due to ambient temperature change

50% of class / 10 K

RS485 interface
Galvanic separation Protocol Supported protocol functions Data frame type Baud rate [b/s]

From all other signal connections MODBUS RTU 3, 4, 6, 16, 17
8N1, 8N2, 8O1, 8E1 2400, 4800, 9600, 14400, 19200, 28800,
38400, 57600, 115200

Alarm outputs:
· NO relay: 5 A / 250 V AC; 5 A / 30 V DC (listed current values are the maximum permissible values. Operation at maximum load significantly shortens lifespan of the

N32P-09

User's manual

relay).

· Three relays with a switching contact (option): 6 A / 250 V AC; 6 A / 30 V DC; 0.15 A / 250 V DC. Maximum switching current 10 A / 20 ms.
Analog output

Voltage output Rated range Maximum output voltage Minimum load resistance Intrinsic error Error due to temperature change Current output Rated range Maximum output voltage Maximum load resistance Maximum current value Intrinsic error Error due to temperature change

0...10 V < 15 V 500 0.1 % of range 50% of intrinsic error value / 10 K
0...20 mA; 4...20 mA < 15 V 500 24 mA
0.1% of range 50% of intrinsic error value / 10 K

Rated operating conditions Supply voltage (depends on the version)
Power consumption Working temperature Storage temperature Humidity Working position Pre-heating time

85...253 V AC (40...400 Hz), 90...300 V DC or
20...40 V AC (40...400 Hz), 20...60 V DC < 6 VA
-20...23...+55 ºC -30...70 ºC
<95 % (no condensation) any
15 minutes

Protection grade ensured From the front From the terminals side

IP65 IP10

Weight and dimensions Meter weight

< 0.2 kg

N32P-09 Dimensions (see Fig. 3)

User's manual

96 x 48 x 93 mm

Electromagnetic compatibility Noise immunity: Noise emission:

acc. to EN 61000-6-2 acc. to EN 61000-6-4

Safety requirements acc. to EN 61010-1 Circuit-to-circuit insulation:

basic

Installation category:

III

Pollution grade

Maximum phase-to-earth operating voltage:

300 V for the measurement circuits. 300 V for the circuits: supply, alarm. 50 V for the circuits: auxiliary supply, RS-485 interface, analog output

Altitude a.s.l.

< 2000 m

8 Ordering code
Panel meter N32P typeSupply voltage 85..253 V AC, 90...300 V DC 20...40 V AC, 20...60 V DC Outputs / Interface 1 relay output, RS-485 4 relay outputs, RS-485 4 relay outputs, RS-485, 1 analog output Version standard custom-made* Language version Polish - English* Acceptance tests without extra requirements with quality inspection certificate with calibration certificate acc. to customer's request*
· only after agreeing with a manufacturer.

X X XXXXXXX X X
1 2
1 2 3
0000000 XXXXXXX
M
0 1 2 X

N32P-09

User's manual

LUMEL S.A. ul. Slubicka 4, 65-127 Zielona Góra, POLAND tel. 68 45 75 100 www.lumel.com.pl
Technical support: tel.: (+48 68) 45 75 143, 45 75 141, 45 75 144, 45 75 140 e-mail: export@lumel.com.pl
Export department: tel.: (+48 68) 45 75 130, 45 75 131, 45 75 132 e-mail: export@lumel.com.pl
Calibration & Attestation: e-mail: laboratorium@lumel.com.pl
N32P-09

References

Lumel | Automation devices and systems | SMT/THT assembly | Lumel

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