Automation Products Group MND Modbus Network Display

Table of Contents

• Warranty
• Display Wiring
• Using the MND
• Access Modes
• Menu Flow Chart
• Units of Measure
• Enter Button Function
• Advanced Settings
• Outputs
• Communications
• Communications Setup Examples
• Resetting to Factory Defaults
• Specifications

Warranty and Warranty Restrictions

APG warrants its products to be free from defects of material and workmanship. APG will, without charge, replace or repair any equipment found defective upon inspection at its factory, provided the equipment has been returned, transportation prepaid, within 24 months from date of shipment from factory.

This warranty is in lieu of and excludes all other warranties not expressly set forth herein, whether expressed or implied by operation of law or otherwise, including but not limited to any implied warranties of merchantability or fitness for a particular purpose.

No representation or warranty, express or implied, made by any sales representative, distributor, or other agent or representative of APG which is not specifically set forth herein shall be binding upon APG. APG shall not be liable for any incidental or consequential damages, losses or expenses directly or indirectly arising from the sale, handling, improper application or use of the goods or from any other cause relating thereto and APG's liability hereunder, in any case, is expressly limited to the repair or replacement (at APG's option) of goods.

Warranty is specifically at the factory. Any on-site service will be provided at the sole expense of the Purchaser at standard field service rates.

All associated equipment must be protected by properly rated electronic/electrical protection devices. APG shall not be liable for any damage due to improper engineering or installation by the Purchaser or third parties. Proper installation, operation and maintenance of the product becomes the responsibility of the user upon receipt of the product.

Returns and allowances must be authorized by APG in advance. APG will assign a Return Material Authorization (RMA) number which must appear on all related papers and the outside of the shipping carton. All returns are subject to the final review by APG. Returns are subject to restocking charges as determined by APG's “Credit Return Policy”.

Display Wiring

The following tables detail the wiring connections for various cable types:

4/C Cable (22 AWG 2-TP)

*No connection for MND's with internal batteries

4-pin MM12

*No connection for MND's with internal batteries

5/C Cable (22 AWG)

*No connection for MND's with internal batteries

6-pin Tajimi

*No connection for MND's with internal batteries

8/C Cable (22 AWG)

8-pin MM12

Using the MND

The MND features several buttons for operation:

• Increase Button: In Operating Mode, cycles through sensor readings. In Setup Menu, cycles upward through menu options or increases setting values.
• Decrease/Power Button: In Operating Mode, press and hold for 1 second to power on/off. In Setup Menu, cycles downward through menu options or decreases setting values.
• Enter Button: In Operating Mode, cycles between current, maximum, and minimum readings. In Setup Menu, enters selected menu or accepts a setting.

The display includes an Output Status Indicator, Battery Meter, and a Scalable Bar Graph.

Access Modes

The MND has several operating modes that limit access to setup menus. To access the mode setting:

1. Simultaneously press and hold the Decrease and Enter buttons for approximately 5 seconds to display the 3-digit mode access number.
2. Use the Increase/Decrease buttons to change the value of the flashing digit, and the Enter button to accept and advance to the next digit.

Mode Options:

• 000: Full Access. All menu options are accessible.
• 001: Locks all setup menus. Increase button scrolls sensor readings; Decrease/Power button powers display on/off; Enter button scrolls between max, min, and current readings.
• 002: Hides the Output menu; other setup menus are accessible.
• 003: Hides analog options in the Output menu; only relay options are accessible.
• 004: Hides relay options in the Output menu; only analog options are accessible.
• 005: All menus are hidden and buttons are locked, except the Decrease/Power button for powering on/off.

*See "Setting Mode Access Password" under Sensor Label section (page 21) for more information.

Menu Flow Chart

A visual representation of the MND's menu structure and navigation is provided. This chart details the flow between different settings and options, including:

• Main Menu: Access to AL SET, AH SET, CAL, TYPE, T1/T2 settings, and COMM.
• AL SET: Includes options like Auto-Off, Decimal Place, Digit Mask, Digit Shift, Multiplier, Bar Graph, Overload, and Battery settings.
• COMM: Settings for Baud Rate, Parity, Stop Bit, and Communication Type (Master, Sniffer, Slave).
• ADVSET: Advanced settings including Auto-Off, Decimal Place, Digit Mask, Digit Shift, Multiplier, Bar Graph, Overload, and Battery settings.
• OUTPUT: Settings for Analog Low/High Set-points, Calibration, and Trip Types (1&2).
• UNITS: Selection of units for display (e.g., Cubic Feet, Gallons, Liters).
• INPUT: Settings for Backlight and Mode.

UNITS (Units of Measure Label)

Allows the user to select the unit of measure label that appears on the lower display line. Options include:

• CU FT (Cubic Feet)
• MCU FT (Million Cubic Feet)
• GALLON (Gallons)
• CU M (Cubic Meters)
• CUSTOM (Custom Units)
• LITERS (Liters)
• CU IN (Cubic Inches)
• PCTFUL (Percent Full)
• BARREL (Barrels)

Note: The selected units of measure apply to all sensor readings and cannot be set individually. The units label will automatically display 'PCTFUL' for readings in Percent Full mode.

ENTR (Enter Button Function)

Selects the function of the ENTER button in standard operating mode. Functions include:

• MAXMIN: Cycles between present, highest, and lowest readings.
• TEMP C: Cycles between reading and temperature in °C.
• TEMP F: Cycles between reading and temperature in °F.
• 2 READ: Cycles between 2 readings.
• 2RD 1C: Cycles between 2 readings & temperature in °C.
• 2RD 1F: Cycles between 2 readings & temperature in °F.

*2nd reading is applicable to MPX dual-float sensors only.

AdVSET (Advanced Settings)

• Auto Off: Automatically powers off the MND after a set time with no button presses. Minimum time is 15 seconds. To disable, set to 65535 (default). Cannot be set lower than the relay "On Time" setting.
• DECPL (Decimal Place): Defines the decimal point position in the reading. APG sensors can set decimal places before sending to MND.
• MASK (Digit Mask): Masks the least significant digit(s) (up to 3 places), displaying them as '0'.
• SHIFT (Digit Shift): Shifts the reading to the right by dividing by 10, 100, or 1000.
• MLTPLR (Multiplier): Applies a conversion multiplier to sensor readings. For example, a multiplier of 2.0 doubles the reading. APG sensors can also apply multipliers before sending data.
• BAR 0% & BAR 100%: Define the readings for 0% and 100% on the display bar graph. Bars update in 10% increments. Bar graph limits apply to all sensors when multiple are displayed.
• OVERLOAD: Sets an overload warning if the reading exceeds a specified value. This setting applies to all sensors simultaneously. Default is 99999.
• BATEN (Battery Enabled): Selects battery monitoring option: No Battery, Internal Battery, or RST Battery. Internal battery indicator is limited to voltages less than 15 Vdc.
• BATFUL (Battery Full Voltage): Sets the voltage for a full battery indication.
• BATLOW (Battery Low Voltage): Sets the voltage for a low battery indication.

OUTPUT (Outputs)

The MND offers optional outputs: solid-state relays, 4-20 mA, or 0-3 Vdc analog signals. Not all output options apply to all MND configurations. The Sensor Address setting determines which sensor controls the output(s).

• AL SET (Analog Low Set-point): Sets the reading for the low analog value (4mA or 0V).
• AH SET (Analog High Set-point): Sets the reading for the high analog value (20mA or 3V).
• ALCAL (Analog Low Calibration): Adjusts the low end of the analog output. Increasing/decreasing the value adjusts the low end.
• AHCAL (Analog High Calibration): Adjusts the high end of the analog output. Increasing/decreasing the value adjusts the high end.
• T1TYPE & T2TYPE (Trip 1&2 Type): Determines the functional logic of the relay outputs based on Trip Type descriptions (pages 14-16). MND Telecom Relays are rated for a maximum switched load of 5 Amps at 240 VAC or 220 VDC.
• T1READ & T2READ (Trip 1&2 Reading): Defines the display reading that corresponds to a change in the relay output state, based on the selected Trip Type.
• T1 WIN & T2 WIN (Trip 1&2 Window): Defines the secondary value (from the Trip Reading) for Exclusive, Inclusive, and Hysteresis Trip Types.

Trip Type Descriptions

NEAR: Output activates when reading is less than Trip Reading.

EXCLUSIVE: Output activates when reading is less than Trip Reading OR greater than Trip Reading + Trip Window.

HYSTERESIS NEAR: Output activates until reading is greater than Trip Reading + Trip Window, then deactivates when reading is less than Trip Reading.

FAR: Output activates when reading is greater than Trip Reading.

HYSTERESIS FAR: Output activates when reading increases beyond Trip Reading + Trip Window, remains active until reading falls below Trip Reading, and remains deactivated until reading is again greater than Trip Reading + Trip Window.

ON: Holds the output closed whenever the display is powered.

OFF: Disables the output.

Note: For Normally Closed relays, ON is Open; for Normally Open relays, ON is Closed.

• LOFRST (LOE/RST): Output follows the state of a corresponding LOE or RST sensor acting as the master device.
• TIME R (Timed Interval): Sets output activation on a timed interval. Interval Time (INTMIN) is time between activations (minutes), and On-Time (ON SEC) is duration of activation (seconds). When used with Auto-Off, MND wakes at each interval and stays powered for the On-Time duration.
• TEMP (Heater Temperature): LCD heater controlled by Trip Relay 1. Set "on" temperature using Trip 1 Reading (TIREAD) in °C. Trip 1 Window (T1 WIN) sets "off" temperature based on degrees above "on" temperature.

Switchable Power Source Output Option

This option allows an internal battery-powered MND to share its battery power (via relay T1) with APG Modbus sensors (MNU, MPX, PT series) for a monitoring system. Pressing the power button wakes the system, polls the sensor, and re-enters sleep mode.

Relay T1, set to Timed Relay mode, controls sensor voltage. Setting Interval Time to 0 forces T1 active immediately upon waking. APG recommends an On Time of 8-10 seconds for sensor power-up and reading. Auto-Off determines how long the MND remains powered before re-entering sleep mode.

Recommended APG Settings:

• Output Menu (OUTPUT): Trip 1 Type (T1TYPE) = Timed Relay (TIME R)
• Interval in minutes (INTMIN) = 0
• On Time in seconds (ON SEC) = 8-10
• Advanced Menu (AdVSET): Auto-Off = 15 seconds

WARNING! The Switchable Power option sources battery voltage directly to the output line when the display is powered "on". Care must be taken not to short this voltage to other output lines (DC common or communication lines).

*This option requires special factory hardware configuration and is not a standard MND feature.

COMM (Communications)

• Baud Rate: 2400, 9600, 19200, 38400
• Parity: even, odd, none
• Stop Bit: 1, 2
• Note: APG Modbus sensors use 9600 baud, no parity, and 1 stop bit.
• C-TYPE (Communications Type):
• MASTER: MND operates as the master device.
• SNIFER (Sniffer): MND passively monitors communications between a master and sensors. Master must poll sensors for MND to update readings.
• LRSNIF (LOE/RST Sniffer): Functions like Sniffer mode but also monitors LOE or RST-5000 Ethernet sensors.
• SETUP: MND acts as a "slave" device for programming via APG Modbus software. Sensor Address (SENADR) is used as the MND's address in Setup mode.
• SENADR (Sensor Address): Sets the address for single sensor monitoring and the MND's own address in Setup mode. For multiple sensors, addresses must start at 1 and increment sequentially.
• NUMSEN (Number of Sensors): Sets the number of sensors to monitor.
• REGNUM (Register Number): Sets the register number to display. APG sensor readings are stored in register 30303. Enter the last 3 digits (e.g., 303 for 30303).
• FUNCTN (Function): Sets the function code for the register (3 = holding register, 4 = input register).
• REGTYPE (Register Type): Sets the bit type of the register. Options include signed/unsigned 8, 16, and 32-bit values. APG sensor readings are unsigned 32-bit.
• SCANRT (Scan Rate): Determines how often the MND polls the sensor(s) in seconds when in Master mode.

Write Function

Allows the MND (in Master mode) to write a value to a specific holding register of a sensor. Steps involve setting Sensor Address, Register Number, Register Type, and Register Value, then confirming the write.

Example: Changing Empty Distance (register 40407) to 2150 for sensor address 5.

• Sensor Address: 05
• Register Number: 407
• Register Type: U16 (unsigned 16-bit)
• Register Value: 02150
• Write Yes/No: Yes (Enter)

Address Change (ADRCHG)

Allows quick changing of a sensor's address when MND is Master. Enter current address, then the new address.

Communications Setup Examples

APG sensor readings are stored in register 303 (unsigned 32-bit).

• MND master, single sensor (address 1): C-Type = Master, Number of Sensors = 1, Sensor Address = 1, Register Number = 303, Function = 4, Register Type = U32.
• MND master, multiple sensors (addresses 1-6), outputs keyed to Sensor 3: C-Type = Master, Number of Sensors = 6, Sensor Address = 3, Register Number = 303, Function = 4, Register Type = U32.
• MND in Sniffer mode, single sensor (address 3): C-Type = Sniffer, Number of Sensors = 1, Sensor Address = 3, Register Number = 303, Function = 4, Register Type = U32.
• MND, 2 sensors + LOE ultrasonic: C-Type = LOE/RST Sniffer (LRSNIF), Number of Sensors = 2 (LOE sensor not counted), Sensor Address = n/a, Register Number = 303, Function = 4, Register Type = U32.

SENLAB (Sensor Labels)

Allows assigning a custom label for each sensor (up to 10 sensors + LOE/RST master). The label appears on the display, alternating with the Unit of measure.

Note: Setting a Mode Access Password (page 8). If a label is assigned for Sensor 10, it becomes the password. Default label '10AAAA' requires no password.

PCTFUL (Percent Full)

Displays sensor readings as a percentage of full, based on a user-defined 100% value. To enable, select PCTFU in the main menu, choose the sensor, and enter the 100% value. 0% (empty) is assumed to be 0. Setting value to 00000 (default) disables the feature.

Note: 'PCTFUL' label displays as the unit of measure for sensors in Percent Full mode. Output settings must be based on underlying readings, not the displayed percentage.

*bLIGHT (Back Light) *Optional Feature

Mode options: On, Off, 30 Sec, 1 min, 2 min, 4 min, 8 min, 16 min. Adjust backlight intensity by selecting brightness (ORTHES) and using up/down arrow buttons.

Programming the MND using APG Modbus Software

The MND's "Setup" communications type allows programming via software. The same software programs APG's Modbus sensors (MNU, MPX, PT series). Software allows saving and loading MND configurations.

Steps to establish communications and program:

1. Use MND buttons to enter Communications menu, change C-TYPE to "SETUP".
2. Note the Sensor Address (SENADR) setting; this is the MND's address for software communication.
3. Install and run APG Modbus software.
4. In the software, click "Configure" > "Communication" to open the Communication Configuration window.
5. Check USB Communication box (for RST-6001 RS-485 to USB converter) or select the Com Port for the RS-485 to RS-232 converter.
6. Ensure Sensor # matches the MND's Sensor Address setting.
7. Select MND.
8. Click "Save Config", then "Close".
9. Click on "Sensor 1" to enter the programming window for the MND.

Register Values: Register values populate automatically. To change a parameter, click its value, enter the new value, and click the adjacent "Send" button.

Changing Multiple Parameters: Click individual values, enter new values, then click "Send All" to write all changes.

Communication Feedback: A green window indicates successful communication. A yellow window indicates communication failure or value out of limits.

Saving and Recalling Settings Configurations

Saving: Click "File" > "Save Mode Values". Choose file name and location, then click "Save".

Recalling: Click "File" > "Load Mode Values". Choose file, click "Open". Click "Send All" to write parameters to the MND.

Resetting the MND to Factory Defaults

Simultaneously press and hold the Decrease/Power and Enter buttons for approximately 5 seconds. Enter the mode number '125' and press Enter. This resets all parameters to factory defaults.

Factory Defaults:

Specifications

Environmental

• Housing: IP67
• Storage Temp: -40 to 160°F (-40 to 71°C)
• Operating Temp: 0 to 160°F (-18 to 71°C)

Electrical

• Batteries: 9 V Lithium or 3.6 V Lithium (no outputs)
• External Power: 9-28 Vdc

Physical

• Case Material: injection molded material EMI-X PDX-W-88341

4-20 mA Output

• Input Voltage Requirements: 9 Vdc min (no load) to 28 Vdc max
• Signal Variance: +/-0.16 mA at set points
• Output/Input: 2-wire loop-powered
• Resolution: 14 bit
• Protection: reversed polarity

0-3 VDC Output

• Input Voltage Requirements: 9 to 28 VDC
• Signal Variance: +/-0.05 VDC at set points
• Type: non-isolated 3-wire
• Resolution: 14 bit
• Protection: reversed polarity

Trip Point Telecom Relay Outputs

• Maximum Switched Voltage: 240 VAC or 220 VDC
• Maximum Switched Current: 5A

Sensor Register Lists

MNU Series Ultrasonic

Input Registers (0x04):

Holding Registers (0x03):

MPX Series Magnetostrictive

Input Registers (0x04):

Holding Registers (0x03):