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CMU-BACnet Guide

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CMU-BACnet Guide-211201
Compact Make-up Air Unit
BACnet Communication Module User Guide
CMU-BACnet Guide-211201

Compact Make-up Air Unit
BACnet Communication Module User Guide
Introduction
The CMU Compact Make-up Air Unit BACnet Communication Module User Guide provides information about using the CMU Compact Make-up Air Unit with BACnet communications feature. The BACnet communication protocol for building automation and control networks enables communication between client devices within a network. The controller provides a BACnet network interface between BACnet client devices and Neptronic Controller series devices. It uses the BACnet Master Slave/Token Passing (MS/TP) protocol at the BACnet MAC layer.
Pre-requisites
The BACnet communication user guide assumes that you are familiar with the concepts of BACnet and its terminology.
Advantages of BACnet
BACnet enabled controllers have the following advantages:
· Quick Message Transmission. The controller uses a synchronous implementation for BACnet messages making it quick and efficient. Each BACnet confirmed service request is answered as quickly as possible without using the Reply Postponed frame. The MS/TP implementation is performed within Tusage_delay of 15 minutes to ensure a Tusage_timeout value within 20 minutes.
· MS/TP Support. The controller supports a Full Master Node state machine for MS/TP. Max_Master and the instances are configured to the device object through BACnet WriteProperty service. The MAC address is set via the DIP switches. Programming mode determines the MS/TP baud rate setting of 9600, 19200, 38400, and 76800. In the configuration mode, the device is configured through the device's keypad. For more information about the WriteProperty, refer to Table 3 - Object Types Supported.
· BIBB Support. The controller functions the same way as the B-ASC type profile server and supports the specific BIBB as per their relevant definitions.
o DS-RP-B o DS-RPM-B o DS-WP-B
o DS-WPM-B
o DM-DCC-B o DM-DDB-B o DM-DOB-B o DM-RD-B
o DM-TS-B o DM-UTC-B o DS-COV-B o DS-COVP-B o SCHED-WS-I-B
· Object Support. The controller supports a fixed list of BACnet visible values, which appear as Present_Values of various BACnet standard object types in addition to a device object. For more information, refer to Table 3 Object Types Supported.
· Alarms. The controller supports indication of various alarm conditions through value changes in properties of several objects. However, it does not generate BACnet event notifications.

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Compact Make-up Air Unit
BACnet Communication Module User Guide

BACnet Properties Configuration
To establish communication on the network and guarantee a unique ID of devices in a BACnet system, the following properties may have to be configured.
Table 1 - BACnet Properties Configuration

Property MAC Address

Default Value 000

Device Instance

Auto

Baud Rate

0 = Auto

Max_Master

127

Device Object.Object_Name Name of the device

Configuration
Set to a value between 000 and 127 via DIP switches. Can also be set to a value between 000 and 254 via menu. The values from 128-254 represent MS/TP non-token passing slave devices.
· The controller automatically configures its device instance to 153,000 + MAC address.
· The value can be set manually via the menu.
· The value can be set manually through the WriteProperty service to Device Object.Object_Identifier.
· The device's Object_Identifier is a combination of the Device Object_Type (8) and the Device_Instance (0-4194302), therefore its decimal or hexadecimal representation tends to be incomprehensible.
· For example, the Device_Instance=1000 has an equivalent Object_Identifier of 0x020003E8 hexadecimal or 33555432 decimal.
· The controller configures its baud rate automatically by detecting the network upon connection.
· The value can be set manually from the available values of Auto, 9600, 19200, 38400, 76800.
· Configure Max_Master value to increase network efficiency when there are less than 127 devices on the network.
· The Max_Master value can be changed via menu or through the WriteProperty service to the Device Object.Max_Master.
For more information, refer to the MAC Address and Max_Master section.
· Configure the name of the device through WriteProperty service to the Device Object.Object_Name. For example, CMU.

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Compact Make-up Air Unit
BACnet Communication Module User Guide

Configuration Options

The following Configuration options enable you to configure and run the BACnet features of the controllers quickly.

Quick Setup

Configure the controller's baud rate and device instance without programming. 1. Set a unique MAC address using the DIP switches located on the controller. 2. Connect the controller to the network and power it up. 3. The controller automatically configures the baud rate and device instance. 4. Repeat the steps for each controller.

Manual Setup

To use a Device_Instance other than 153,000, and/or if your site has more than one controller network, go to the menu using the TDF digital room sensor.
1. Ensure that the TDF digital room sensor jumper is in the RUN position.

2. Press the and

buttons simultaneously for 5 seconds. The "Enter Password" screen appears.

3. Enter the 637 password within 1 minute by using the arrow keys to increase or decrease the value and

the and

buttons to toggle between the digits.

4. Follow the menus to configure the Baud Rate, MAC address, Max Master, and Device Instance manually.

5. Disconnect the power to the controller, connect the controller to the network, and connect the power again.

Configure the Max_Master value through WriteProperty service to the Device Object.Max_Master to increase network efficiency or if there are less than 127 devices on the network.

MAC Address and Max_Master

The MAC address must be unique on the entire MS/TP network. However, having a unique MAC address and a high baud rate does not guarantee efficient operation of the controller and other MS/TP units on the MS/TP network. Some MAC address and Max_Master combinations are more efficient than others. BACnet requires token-passing units to occasionally "poll" for other masters based on the MAC address and Max_Master. A poor combination of MAC addresses and Max_Master can lead to a slower network due to lost time polling for masters that are not present. Unless there are 126 other units on the MS/TP network, the default Max_Master value of 127 is not the most efficient choice for the controller. The Max_Master default value of 127 was selected to ensure that any master, specifically a BACnet client can be found when the controller is initially started.
Examples of MAC Address and Max_Master Configurations
The following are some of the examples to indicate the optimum combination of Mac address and Max_Master configurations to ensure a quick and efficient output.
Example 1

· MAC=0. Max_Master=127
· MAC=1, Max_Master=127
This configuration is slow and inefficient because every time either unit is required to find another master unit, it has to poll 126 units until it finds the right one to pass the token.

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Compact Make-up Air Unit
BACnet Communication Module User Guide
Example 2
· MAC=0. Max_Master=5
· MAC=1 to MAC=4 are not used
· MAC=5, Max_Master=5 This configuration is better than Example 1 but it is still slower. The Max_Master is set to the most efficient value but the gap between the two MAC addresses is high. Therefore, each unit must poll four units until it finds the right one to pass the token. Example 3
· MAC=0. Max_Master=1
· MAC=2, Max_Master=2 This is an incorrect configuration. The MAC=0 will never find MAC=2 because it will never poll for the master MAC address=2. Example 4
· MAC=0. Max_Master=3
· MAC=1, Max_Master=3
· MAC=2, Max_Master=3
· MAC=3, Max_Master=3 This is an efficient configuration as the units are numbered consecutively and the Max_Master is set to the most efficient value. As a general guideline, the most efficient setup for an MS/TP network is one in which the units are consecutively numbered starting at MAC address 0 and having Max_Master=the maximum MAC address in the system. If consecutive numbering is not possible, then the next most efficient setup is one in which all units have Max_Master=the maximum MAC address in the system.
Copy Config
Copy and broadcast the entire configuration of a controller to controllers of same type using the Copy Config feature. 1. Access Operation Mode (jumper set to RUN position). 2. Press and hold both function buttons for 5 seconds to access the Quick Access menu. 3. Enter the password, 637. 4. Scroll to Copy Config programming menu and select Yes. Follow the rest of the onscreen instructions.
Note: A Copy Config can also be executed via BACnet. See AV.165, AV.166, AV.167, and BV.90 in Table 6 Object Table Information: Analog Value (AV) and Table 9 - Object Table Information: Binary Value (BV) for details. However, the BACnet Schedule is not copied during a Copy Config operation.
Network Reset
Reset the controller via BACnet using the Reinitialize Device service. The Reinitialize Device service can be accessed using the following password: nep. The Reinitialize Device service has two types of reset such as:
· Warm Reset. The Warm Reset restarts the controller with actual configuration.
· Cold Reset. The Cold Reset restarts the controller with Factory configuration.
Warning: The Cold Reset erases the actual configuration when setting the MSTP address. Therefore, exercise caution while performing a Cold Reset.

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Compact Make-up Air Unit
BACnet Communication Module User Guide

Device Object Properties

The following table lists all the BACnet properties supported for the device object. The W indicates that the property is writable using the BACnet WriteProperty service.
Table 2 - Device Object Properties

Property
Object_Identifier
Object_Name Description Object_Type System_Status Vendor_Identifier Vendor_Name Model_Name Firmware_Revision Application_Software_Version Protocol_Version Protocol_Revision DataBase_Revision Max_APDU_Length_Accepted Segmentation_Supported APDU_Timeout Number_of_APDU_Retries Local_Time Local_Date UtC_Offset Daylight_Savings_Status Backup_Failure_Timeout Configuration_Files Last_Restore_Time Backup_And_Restore_State Backup_Preparation_Time Restore_Completion_Time Restore_Preparation_Time
Protocol_Services_Supported
Protocol_Object_Types_Supported
Object_List Device_Address_Binding Max_Master Max_Info_Frames
Proprietary property #1000

Value

· Programmable where the instance part of the Object_Identifier is in the range of 0-4194302
· The device instance must be unique system-wide · The default value for the device instance=153003 (Vendor_Identifier*1000)
MU@irCOM, programmable up to 32 bytes

Programmable up to 32 characters

Device

Operational

Always 153

Always Neptronic

Example, CMU-COM
currently, 1.02 currently, 1.77 Always 1 Always 14 Default: 77, incremented if Object Name and/or device ID change Always 480 (3) = No Segmentation
6000
Always 3
00:00:00

01-Jan-2020 (Thu)

-300 minutes

False

300

File-1

2020-01-01 (Thu), 00:00:00:00

IDLE

0

0

0
· subscribeCOV · atomicReadFile · atomicWriteFile · readProperty · readPropertyMultiple · WriteProperty · writePropertyMultiple · deviceCommunicationControl · analog-input · analog-output · analog-value · binary-input · binary-output · binary-value 134
Always empty

· reinitializeDevice · unconfirmedPrivateTransfer · timeSynchronization · who-Has · who-Is · UtcTimeSynchronization · subscribeCOVProperty
· device · file · program · schedule · multi-state-value

Programmable in the range of 1-127 (default: 127)

Always 1

· Represents the MS/TP MAC address in the range of 0 to 254 (default: 0) · Writable if all MAC address DIP switches are off · Values 128 to 254 represent MS/TP non-token passing slave devices

Writable W W W
Read Only Read Only Read Only Read Only Read Only Read Only Read Only Read Only
W Read Only
W W W W W
Read Only W
W

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Compact Make-up Air Unit
BACnet Communication Module User Guide

Property Proprietary property #1001 Proprietary property #1002

Value
· Programmable (default: Auto) · Represents the MS/TP Baud rate (unsigned type) · Values are 0 (auto), 9600, 19200, 38400, 57600, 76800 · Reading this property always returns the actual Baud rate · Programmable (default: 15 minutes) · Represents the period of time that an object in/out of service will automatically
return to normal. Range = 0-120 minutes (unsigned type) · Writing 0 means no automatic return to normal

Writable W W

Object Types Supported

The following table lists all the BACnet properties supported for each object type. Most of the properties are locked. The exception is Present_Value, which represents the dynamic operating values of the device, and the Status_Flag, Event_State, and Reliability properties, which reflect the availability of the Present_Value. Unless otherwise specified, properties are not changeable.
Table 3 - Object Types Supported

Object Type

Enabled

Optional Properties Supported

Writable Properties

Notes

Note: Writable properties are different for some objects. Refer to the respective Object Table information to know the writable property for objects.

· If "Out of Service" is true, Present_Value and Status_Flag become writable properties.

Analog Input

· Reliability

· Description



· Min_Present_Value

· Max_Present_Value

· Resolution

· COV-Increment

· Out_of_Service · COV-Increment

· Out_of_Service property is writable for objects to which Present_Value is not writable.
· Refer to Out of Service Property section on page 7 for more information.
· Object will automatically return to Normal after a programmable period of time. Refer to Proprietary property #1002 of Device Object in Table 2 Device Object Properties.

· Present_Value property is writable for every AV object unless indicated.

Analog Value

· Reliability

· Description



· COV-Increment

· Priority_Array

· Relinquish_Default

· Present_Value · Out_of_Service · COV-Increment

· Out_of_Service property is writable for objects indicated in Table 6 - Object Table Information: Analog Value (AV) on page 9.
· Refer to Out of Service Property section on page 7 for more information.
· Object will automatically return to Normal after a programmable period of time. Refer to Proprietary property #1002 of Device Object in Table 2 Device Object Properties. Some objects are commandable. In such case, the priority-array and relinquish-default properties are available.

Analog Output

· Description

· Reliability



· Min-Pres-Value

· Max-Pres-Value

· Resolution

· COV-Increment

· Present_Value · COV-Increment

· If "Out of Service" is true, Present_Value and Status_Flag become writable properties.

Binary Input

· Reliability



· Active_Text

· Inactive_Text

· Description

Out_of_Service

· Out_of_Service property is writable for objects to which Present_Value is not writable.
· Refer to Out of Service Property section on page 7 for more information.
· Object will automatically return to Normal after a programmable period of time. Refer to Proprietary property #1002 of Device Object in Table 2 Device Object Properties.

Binary Value

· Reliability

· Active_Text



· Inactive_Text

· Description

· Priority_Array

· Relinquish_Default

Present_Value

· Present_Value property is writable for every Binary Value object.
· Object automatically returns to Normal after a programmable time. Refer to Proprietary property #1002 of Device Object in Table 2 - Device Object Properties.

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Compact Make-up Air Unit
BACnet Communication Module User Guide

Object Type Binary Output
Device
MultiState Value Program File Schedule

Enabled 

   

Optional Properties Supported
· Description · Reliability · Inactive-text · Active-text
· Max_Master · Max_Info_Frame · Description · Active-COV-subscriptions · #1000 (MSTP addr) · #1001 (Baud rate) · #1002 (Time out) · Local_Time · Local_Date · Uts_Offset · Daylight_Savings_Status · Apdu_Timeout · Backup_Failure_Timeout
· Description · Reliability · States_Text · Description · Reliability
Description
· Description · Weekly Schedule

Writable Properties
Present_Value
· Object_Identifier · Object_Name · Max_Master · Description · Local_Time · Local_Date · Uts_Offset · Daylight_Savings_Status · Apdu_Timeout · Backup_Failure_Timeout · #1000 · #1001 · #1002 · Configuration_Files · Last_Restore_Time · Backup_And_Restore_State · Backup_Preparation_Time · Restore_Completion_Time · Restore_Preparation_Time
Present_Value
Program_Change
· Archive · File Size · Effective Period · Weekly Schedule · Schedule Default · Priority For Writing · Out_of_Service

Notes
Refer to Table 2 - Device Object Properties on page 5.
· Present_Value property is writable for every Multi State Value object unless indicated.
· Out_of_Service property is not writable for MSV. · Only LOAD and RESTART are supported for
Program Change. · Use LOAD to apply the new firmware. Only 0 is the accepted value to be written to file size. If "Out of Service" is true, Present_Value becomes writable property.

Out of Service Property
Neptronic controllers offer the use of the Out of Service writable property. When the value of this property is set to True, it disconnects the object from the physical input, enabling you to input other values. This is useful for special applications or while troubleshooting. For example, you can ignore the temperature read from a sensor and input the desired temperature value in order to perform specific tests.
For security reasons, a timeout will set the Out of Service property back to False after 15 minutes. This value can be modified to between 0 and 120 minutes (For more information, see proprietary property #1002 in Table 2 - Device Object Properties).

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Compact Make-up Air Unit
BACnet Communication Module User Guide
Object Table Information
The CMU uses the following BACnet object tables, categorized on the basis of their ID. The type is the BACnet Object type, the instance is the BACnet Object. Together, the type and instance form the BACnet Object_Identifier for an object according to the following C-language algorithm:
· object_identifier=(unsigned long)((unsigned long)type<<22)+instance
Analog Input (AI)
Table 4 - Object Table Information: Analog Input (AI)

ID

Name

AI.1 AI1_Voltage AI.2 AI2_Voltage AI.3 AI3_Temperature AI.4 AI4_Temperature AI.5 Room Air Temperature AI.6 Room Air Relative Humidity AI.7 CO2Level AI.8 VOCIndex AI.9 LuminousFlux AI.10 CMUOnBoardTempSetpoint Al.11 CMUIntake AI.12 CMUOuttake AI.13 CMUBoardTempeature AI.14 CMUSSRTemp

List

Description

Integrator Displays the actual voltage of analog input 1 in Vdc.

Integrator Displays the actual voltage of analog input 2 in Vdc.

Integrator Displays the actual temperature read by the sensor on analog input 3.

Integrator Displays the actual temperature read by the sensor on analog input 4.

Integrator Displays the room temperature reading value.

Integrator Displays the room relative humidity reading value.

Integrator Displays the reading of the CO2 sensor.

Integrator Displays the reading of the VOC sensor.

Integrator Integrator Integrator

Displays the reading of the light sensor.
Displays the temperature setpoint value from the CMU on-board potentiometer. Only available when MSV.17 is set to (1) OnBoard.
Displays the CMU air intake temperature.

Integrator Displays the CMU air outtake temperature.

Integrator Displays the temperature value of the CMU main printed circuit board.

Integrator Displays the temperature value measured on the solid-state relay.

W?
Out of service COV Increment
Out of service COV Increment
Out of service COV Increment
Out of service COV Increment
Read only COV Increment
Read only COV Increment
Read only COV Increment
Read only COV Increment
Read only COV Increment
Read only COV Increment
Read only COV Increment
Read only COV Increment
Read only COV Increment
Read only COV Increment

Notes
0 to 10V, Resolution: 0.001V
0 to 10V, Resolution: 0.001V
-40°C to 85°C or -40°F to 185°F, Resolution: 0.01°C or 0.018°F -40°C to 85°C or -40°F to 185°F, Resolution: 0.01°C or 0.018°F 0°C to 50°C or 32°F to 122°F, Resolution: 0.01°C or 0.018°F
0 to 100%RH, Resolution: 0.1%RH
0 to 2000 PPM, Resolution: 1 PPM
0 to 65535, Resolution: 1
0 to 16000 Lux, Resolution: 1 Lux
0°C to 35°C or 32°F to 95°F, Resolution: 0.01°C or 0.018°F -40°C to 85°C or -40°F to 185°F, Resolution: 0.01°C or 0.018°F -40°C to 85°C or -40°F to 185°F, Resolution: 0.01°C or 0.018°F -40°C to 85°C or -40°F to 185°F, Resolution: 0.01°C or 0.018°F -40°C to 85°C or -40°F to 185°F, Resolution: 0.01°C or 0.018°F

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Analog Output (AO)
Table 5 - Object Table Information: Analog Output (AO)

ID

Name

List

Description

AO.1 AO1_Voltage AO.2 AO2_Voltage

Integrator Integrator

Commands the voltage on analog output 1 in Vdc. This object is commandable with priority array.
Commands the voltage on analog output 2 in Vdc. This object is commandable with priority array.

Analog Value (AV)

Table 6 - Object Table Information: Analog Value (AV)

ID

Name

List

Description

AV.1 SAT AV.2 SARH AV.3 OAT AV.4 OARH AV.5 DuctStaticPressure
AV.6 ModulatingDamperFeedback AV.7 CurrentAirflowSetpoint AV.8 CMUFanRPM AV.9 CMUHeaterStage1DutyCycle AV.10 NetworkTempSetpoint AV.11 TstatTempSetpoint www.neptronic.com

Integrator Displays the Supply Air Temperature (SAT) reading.

Integrator Displays the Supply Air Relative Humidity (SARH) reading.

Integrator Integrator Integrator Integrator Integrator

Displays the Outside Air Temperature (OAT) reading. Available when any of the analog inputs on the add-on board are configured as an outside air temperature sensor.
Displays the Outside Air Relative Humidity (OARH) reading. Available when any of the analog inputs on the add-on board are configured as an outside air humidity sensor.
Displays the static pressure value in the duct. Available when any of the analog inputs on the add-on board are configured as a static pressure sensor and connected to the Neptronic SPD sensor.
Displays the feedback value corresponding to the modulating damper position. Available when any of the analog inputs on the add-on board are configured as damper feedback. When configured as damper feedback, the CMU waits for the feedback before turning on the fan or heating, as a safety interlock.
Configuration value of the airflow setpoint value as a percentage of the maximum capacity (fan speed setpoint). This object is commandable with priority array.

Integrator Displays the ECM fan speed RPM value. Only available for units with an ECM fan.

Integrator

Displays the duty cycle of the heater vernier stage 1 when there is a demand for heating, provided there are no alarms that prevent the unit from heating or operating normally.

Integrator Configuration value of the temperature setpoint set over the network.

Integrator Configuration value of the temperature setpoint set using the TDF.

Compact Make-up Air Unit
BACnet Communication Module User Guide

W?
Present Value COV Increment Present Value COV Increment

Notes 0 to 10V, Resolution: 0.001V 0 to 10V, Resolution: 0.001V

W?
Read only COV Increment
Read only COV Increment
Read only COV Increment
Read only COV Increment
Read only COV Increment
Read only COV Increment
Present Value COV Increment
Read only COV Increment
Read only COV Increment
Present Value COV Increment Present Value COV Increment

Notes 0°C to 100°C or 32°F to 212°F, Resolution: 0.01°C or 0.018°F 0 to 100%RH, Resolution: 0.01%RH 0°C to 100°C or 32°F to 212°F, Resolution: 0.01°C or 0.018°F
0 to 100%RH, Resolution: 0.01%RH
0 to 1250Pa, Resolution: 0.1Pa

0 to 100%, Resolution: 1%

0 to 100%, Resolution: 1% 0 to 10000 PPM, Resolution: 1 PPM

0 to 100%, Resolution: 0.1%

0°C to 35°C or 32°F to 212°F, Resolution: 0.01°C or 0.018°F
0°C to 35°C or 32°F to 212°F, Resolution: 0.01°C or 0.018°F

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ID

Name

AV.12 Cfg_CMUAntiFreezeSetpoint AV.13 Cfg_OccAirflowSetpoint AV.14 Cfg_UnoccAirflowSetpoint AV.15 Cfg_BI3_StageWeight AV.16 Cfg_BI4_StageWeight AV.17 Cfg_ExhaustFanDelay

List

Description

Advanced Advanced Advanced Advanced Advanced

Configuration value of the CMU anti-freeze temperature setpoint. This object is commandable with priority array.
Configuration value of the airflow setpoint in percentage of the maximum capacity when in Occupied mode.
Configuration value of the airflow setpoint in percentage of the maximum capacity when in Unoccupied mode.
Configuration value of the signal stage weight for binary input 3 in percentage of the full range.
Configuration value of the signal stage weight for binary input 4 in percentage of the full range.

Advanced Configuration value of the exhaust fan start time delay.

AV.18 Cfg_ExhaustFanMinRange

Advanced Configuration of the minimum value of the exhaust fan control signal.

AV.19 Cfg_ExhaustFanMaxRange

Advanced Configuration of the maximum value of the exhaust fan control signal.

AV.20 Cfg_DamperDelay

Advanced Configuration value of the damper stroke time delay.

AV.21 Cfg_OccupanyInputMinTime Advanced Configuration value of the occupancy input minimum time.

AV.22 Cfg_TstatTempSetpointMin

Advanced Configuration of the minimum value of the temperature setpoint set using the TDF.

AV.23 Cfg_ TstatTempSetpointMax Advanced Configuration of the maximum value of the temperature setpoint set using the TDF.

AV.24 Cfg_DryModeSetpoint

Advanced Configuration value of the relative humidity setpoint in dry mode.

AV.25 Cfg_DryModeDeadBand

Advanced Configuration value of the deadband for the relative humidity setpoint in dry mode.

AV.26 Cfg_DryModeAntiCycleDelay

AV.27

Cfg_DuctOccStaticPressureSe tpoint

AV.28

Cfg_DuctUnoccStaticPressure SetPoint

AV.29 Cfg_CO2Setpoint

AV.30 Cfg_CO2DeadBand

Advanced Advanced Advanced Advanced Advanced

Configuration value of the anti-cycle time delay in dry mode.
Configuration value of the static pressure control loop setpoint in the duct when in occupied mode. Configuration value of the static pressure control loop setpoint in the duct when in unoccupied mode. Configuration value of the maximum limit of CO2 concentration before the unit sends an alarm.
Configuration value of the deadband for the maximum limit of CO2 concentration.

AV.31 Cfg_SATOffset

Advanced Configuration value of the Supply Air Temperature offset.

AV.32 Cfg_ SARHOffset

Advanced Configuration value of the Supply Air Relative Humidity offset.

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Compact Make-up Air Unit
BACnet Communication Module User Guide

W?
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment

Notes 0°C to 35°C or 32°F to 212°F, Resolution: 0.01°C or 0.018°F 0 to 100%, Resolution: 1%
0 to 100%, Resolution: 1%
0 to 100%, Resolution: 1%
0 to 100%, Resolution: 1%
1 to 255 seconds, Resolution: 1 second
0 to 10V, Resolution: 0.001V
0 to 10V, Resolution: 0.001V
0 to 255 seconds, Resolution: 1 second
0 to 240 minutes, Resolution: 1 minute 0°C to 35°C or 32°F to 212°F, Resolution: 0.01°C/0.018°F 0°C to 35°C or 32°F to 212°F, Resolution: 0.01°C/0.018°F 10 to 90%RH, Resolution: 0.1%RH
1 to 10%RH, Resolution: 0.1%RH
0 to 720 minutes, Resolution: 1 minute
0 to 1250Pa, Resolution: 0.1Pa
0 to 1250Pa, Resolution: 0.1Pa
0 to 1000 PPM, Resolution: 1 PPM
0 to 200 PPM, Resolution: 1 PPM -5°C to 5°C or -9°F to 9°F, Resolution: 0.01°C or 0.018°F -5 to 5%RH, Resolution: 0.1%RH
Page | 10

ID

Name

List

Description

AV.33 Cfg_OATOffset AV.34 Cfg_OARHOffset AV.35 Cfg_RATOffset

Advanced Configuration value of the Outside Air Temperature offset. Advanced Configuration value of the Outside Air Relative Humidity offset. Advanced Configuration value of the Room Air Temperature offset.

AV.36 Cfg_ RARHOffset

Advanced Configuration value of the Room Air Relative Humidity offset.

AV.37 Cfg_DuctStaticPressureOffset Advanced Configuration value of the duct static pressure offset.

AV.38 Cfg_FactoryMinFanSpeed

Factory Configuration value of the minimum fan speed.

AV.39 Cfg_TempControlPropBand

Factory Configuration value of the temperature control proportional band.

AV.40 Cfg_TempControlIntTime

Factory Configuration value of the temperature control integral time.

AV.41 Cfg_TempControlDerivTime

Factory Configuration value of the temperature control derivative time.

AV.42 Cfg_StaticPressurePropBand

Factory Configuration value of the static pressure control proportional band.

AV.43 Cfg_StaticPressureIntTime

Factory Configuration value of the static pressure control integral time.

AV.44 Cfg_StaticPressureDerivTime

Factory Configuration value of the static pressure control derivative time.

AV.45 Cfg_SATControlBand

Integrator Configuration value of the Supply Air Temperature control band.

AV.46 SynchroTimeoutCount

Factory Configuration value of the synchronization timeout counter.

AV.47 NoHeatDetectionDeadband

Integrator Configuration value of the No Heat Detection deadband.

AV.48 NoHeatDetectionDelay

Integrator Configuration value of the No Heat Detection time delay.

Compact Make-up Air Unit
BACnet Communication Module User Guide

W?
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment
Present Value COV Increment

Notes
-5°C to 5°C or -9°F to 9°F, Resolution: 0.01°C or 0.018°F -5 to 5%RH, Resolution: 0.1%RH -10°C to 10°C or -18°F to 18°F, Resolution: 0.01°C or 0.018°F -5 to 5%RH, Resolution: 0.1%RH
-125 to 125Pa, Resolution: 0.1Pa
0 to 100%, Resolution: 1% 0.5°C to 20°C or 33°F to 68°F, Resolution: 0.1°C or 0.18°F 0 to 255 seconds, Resolution: 1 second
0 to 255 seconds, Resolution: 1 second
0 to 250Pa, Resolution: 1Pa
0 to 255 seconds, Resolution: 1 second
0 to 255 seconds, Resolution: 1 second 2°C to 10°C or 36°F to 50°F, Resolution: 0.01°C or 0.018°F 0 to 65535, Resolution: 1 2°C to 8°C or 36°F to 46°F, Resolution: 0.01°C or 0.018°F 30 to 240 seconds, Resolution: 1 second

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Page | 11

Binary Input (BI)
Table 7 - Object Table Information: Binary Input (BI)

ID

Name

BI.1 BI3_State BI.2 BI4_State BI.3 OccupancySensor BI.4 CMUOnOffInput

List

Description

Integrator Integrator Integrator Integrator

Contact status of analog input 3/binary input 3: (0) Open, (1) Close. Contact status of analog input 4/binary input 4: (0) Open, (1) Close. Status value on whether the occupancy sensor has detected movement. Status value of the state of the CMU on/off input contact.

Compact Make-up Air Unit
BACnet Communication Module User Guide

W?
Out of service Out of service
Read only Read only

Notes
0 = Open, 1 = Close 0 = Open, 1 = Close 0 = No, 1 = Yes 0 = Off, 1 = On

Binary Output (BO)
Table 8 - Object Table Information: Binary Output (BO)

ID

Name

BO.1 BO1_State BO.2 BO2_State

List Integrator Integrator

Description
Contact status of binary output 1: (0) Open, (1) Close. This object is commandable with priority array. Contact status of binary output 2: (0) Open, (1) Close. This object is commandable with priority array.

W? Present Value Present Value

Notes 0 = Open, 1 = Close 0 = Open, 1 = Close

Binary Value (BV)
Table 9 - Object Table Information: Binary Value (BV)

ID

Name

BV.1 ExhaustFanState BV.2 OnOffDamperState BV.3 OnOffDamperFeedback BV.4 CMUFanEnable BV.5 CMUHeaterStage2State BV.6 Cfg_BI3ContactType

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List

Description

Integrator Status value for the state of the exhaust fan.

Integrator Status value for the state of the on/off damper.

Integrator Status value for the state of the on/off damper feedback.

Integrator Status value to indicate whether the CMU fan has been enabled.

Integrator Advanced

Status value for the state of the second heater stage.
Configuration to change the contact's normal position for binary input 3. Input can be set to (0) Normally Opened or (1) Normally Closed.

W?
Read only Read only Read only Read only Read only Present Value

Notes
0 = Off, 1 = On 0 = Closed, 1 = Open 0 = Closed, 1 = Open 0 = No, 1 = Yes 0 = Off, 1 = On 0 = NO, 1 = NC

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Compact Make-up Air Unit
BACnet Communication Module User Guide

ID

Name

BV.7 Cfg_BI4ContactType BV.8 Cfg_BO1ContactType BV.9 Cfg_BO2ContactType BV.10 Cfg_TstatTempSetpointLock

BV.11 Cfg_ScheduleEnable

BV.12 Cfg_UnitSelection BV.13 Cfg_OccupancyInputsEnable BV.14 Cfg_DryMode BV.15 Cfg_CO2ExtractMode BV.16 Cfg_StaticPressureLoop BV.17 Cfg_OccupanyInputsInactiveMode BV.18 SystemOnOff BV.19 HostThermalCutoutAlarm

BV.20 HostCommTimeoutAlarm

BV.21 HostSSRCutoutAlarm BV.22 HostBoardCutoutAlarm BV.23 HostSSOR1Alarm BV.24 HostSSOR2Alarm BV.25 HostBoardTempAlarm BV.26 HostSSRTempAlarm BV.27 HostFanTempAlarm BV.28 HostAirFlowDetectAlarm

List

Description

Advanced Advanced Advanced Advanced Advanced Advanced

Configuration to change the contact's normal position for binary input 4. Input can be set to (0) Normally Opened or (1) Normally Closed. Configuration to change the contact's normal position for binary output 1. Output can be set to (0) Normally Opened or (1) Normally Closed. Configuration to change the contact's normal position for binary output 2. Output can be set to (0) Normally Opened or (1) Normally Closed.
Configuration value to lock the temperature setpoint on the TDF.
Configuration to activate the schedule. The schedule is configurable via BACnet or Modbus. If no schedule is configured, the mode will always be occupied. The time and day will be displayed on the unit.
Configuration value to select between the metric and imperial unit system.

Advanced Configuration value to enable or disable the occupancy inputs.

Advanced Configuration value to enable or disable the dry mode.

Advanced Configuration value to enable or disable the CO2 extract mode.

Advanced Configuration value to enable or disable the static pressure loop.

Advanced

Configuration value to set the occupancy mode when inactive to either the (0) Unoccupied or (1) Off state.

Integrator Configuration value to turn the system on or off.

Integrator Integrator Integrator

Status value to indicate whether the Thermal Cutout alarm has been triggered.
Status value to indicate whether the Communication Timeout alarm has been triggered, indicating that the CMU main board is not receiving any communication from the add-on board.
Status value to indicate whether the SSR Cutout alarm has been triggered.

Integrator Status value to indicate whether the Board Cutout alarm has been triggered.

Integrator Status value to indicate whether the SSOR1 Sensor alarm has been triggered.

Integrator Integrator Integrator Integrator Integrator

Status value to indicate whether the SSOR2 Sensor alarm has been triggered.
Status value to indicate whether the Board Temperature Sensor alarm has been triggered. Status value to indicate whether the SSR Temperature Sensor alarm has been triggered. Status value to indicate whether the Fan Temperature Sensor alarm has been triggered.
Status value to indicate whether the Airflow Sensor alarm has been triggered.

W? Present Value Present Value Present Value Present Value
Present Value
Present Value Present Value Present Value Present Value Present Value Present Value Present Value
Read only
Read only
Read only Read only Read only Read only Read only Read only Read only Read only

Notes 0 = NO, 1 = NC 0 = NO, 1 = NC 0 = NO, 1 = NC 0 = No, 1 = Yes
0 = No, 1 = Yes
0 = Metric, 1 = Imperial 0 = No, 1 = Yes 0 = Disable, 1 = Enable 0 = Disable, 1 = Enable 0 = Disable, 1 = Enable 0 = Unoccupied, 1 = Off 0 = Off, 1 = On 0 = Off, 1 = On
0 = Off, 1 = On
0 = Off, 1 = On 0 = Off, 1 = On 0 = Off, 1 = On 0 = Off, 1 = On 0 = Off, 1 = On 0 = Off, 1 = On 0 = Off, 1 = On 0 = Off, 1 = On

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Page | 13

ID

Name

List

Description

BV.29 HostInvalidConfigAlarm BV.30 HostNoHeatDetectionAlarm BV.31 HostFrequencySynchronisationError BV.32 DamperBlockedAlarm BV.33 SATNotDetectedAlarm BV.34 RATNotDetectedAlarm
BV.35 TimeoutCommAlarm
BV.36 AI1NotConnected BV.37 AI2NotConnected BV.38 NoHeatDetectionAlarm BV.39 ECMFanFeedbackHostAlarm BV.40 Cfg_AutoPID

Integrator Integrator Integrator Integrator Integrator Integrator
Integrator
Integrator Integrator Integrator Integrator Factory

Status value to indicate whether the Invalid Board Configuration alarm has been triggered.
Status value to indicate whether the No Heat Detection alarm has been triggered by the CMU main board, indicating that the heater is not working properly.
Status value to indicate whether there is a frequency synchronisation error, indicating that the heater is not working properly.
Status value to indicate whether the Damper Blocked alarm has been triggered.
Status value to indicate whether the No Supply Air Temperature Input alarm has been triggered.
Status value to indicate whether the No Room Air Temperature Input alarm has been triggered.
Status value to indicate whether the Timeout Communication alarm has been triggered, indicating that the add-on board is not receiving any communication from the CMU main board.
Status value to indicate whether analog input 1 is connected or not, which would otherwise trigger an alarm.
Status value to indicate whether analog input 2 is connected or not, which would otherwise trigger an alarm.
Status value to indicate whether the No Heat Detection alarm has been triggered by the CMU add-on board, indicating that the heater is not working properly.
Status value to indicate whether the ECM Fan Feedback alarm has been triggered, indicating that the feedback value does not correspond to the setpoint.
Configuration value to enable or disable Auto PID.

Compact Make-up Air Unit
BACnet Communication Module User Guide

W? Read only Read only Read only Read only Read only Read only
Read only
Read only Read only Read only Read only Present Value

Notes 0 = Off, 1 = On 0 = Off, 1 = On 0 = Off, 1 = On 0 = Off, 1 = On 0 = Off, 1 = On 0 = Off, 1 = On
0 = Off, 1 = On
0 = Off, 1 = On 0 = Off, 1 = On 0 = Off, 1 = On 0 = Off, 1 = On 0 = No, 1 = Yes

Multi State Value (MSV)
Table 10 - Object Table Information: Multi State Value (MSV)

ID

Name

MSV.1 OccupancyState

List

Description

Integrator

Status that indicates the state of actual occupancy. Occupied: Zone is occupied.
Unoccupied: Zone is not occupied. Off: Occupancy mode is turned off.

MSV.2 Cfg_ObjectListMode

Integrator Configuration value to select the category of BACnet objects to display.

W? Read only Present Value

Notes
Occupied Unoccupied Off
Integrator Advanced Factory

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Page | 14

ID

Name

MSV.3 Cfg_AI1_Mode

MSV.4 Cfg_AI2_Mode
MSV.5 Cfg_AI3_BI3_Mode
MSV.6 Cfg_AI4_BI4_Mode MSV.7 Cfg_AO1_Mode MSV.8 Cfg_ AO2_Mode www.neptronic.com

Compact Make-up Air Unit
BACnet Communication Module User Guide

List

Description

Advanced

Configuration value for the mode of Analog Input 1. This input accepts a 0-10Vdc signal. Off: The input is not used. SAT: The input is used for the supply air temperature sensor. SARH: The input is used for the supply air relative humidity sensor. OAT: The input is used for the outside air temperature sensor. OARH: The input is used for the outside air relative humidity sensor. StaticPressure: The input is used for a static pressure sensor meant to control the unit and maintain the setpoint. FanSetpoint: The input is used as an external 0-10Vdc control setpoint for the fan speed. This option is applicable only for ECM fans. DamperFeedback: The input is used as feedback to monitor a modulating damper connected to the unit.

Advanced Same description as MSV.3

Advanced

Configuration value for the mode of Analog input 3/Binary input 3. This input accepts a 10K Type 3 or dry contact signal. Off: The input is not used. SAT: The input is used for the supply air temperature sensor. OAT: The input is used for the outside air temperature sensor. DamperFeedback: is used as feedback to monitor an on/off damper connected to the unit. Occupancy: The input is used for occupancy detection. FanSpeedStage: The input is used to change the stage of the CMU fan speed when used with multiple exhaust fans. It requires the SIH-150 to be connected with the exhaust fan and wired back to the unit.

Advanced Same description as MSV.5

Advanced

Configuration value for the mode of Analog output 1. Provides a 0-10Vdc signal. Off: The output is not used. ExhaustFan: The output is used for an exhaust fan proportional to the CMU fan speed. Damper: The output is used for modulating inlet dampers which will open or close based on the CMU run status.

Advanced Same description as MSV.7

W? Present Value
Present Value Present Value Present Value Present Value Present Value

Notes
Off SAT SARH OAT OARH StaticPressure FanSetpoint DamperFeedback
Off SAT SARH OAT OARH StaticPressure FanSetpoint DamperFeedback
Off SAT OAT DamperFeedback Occupancy FanSpeedStage
Off SAT OAT DamperFeedback Occupancy FanSpeedStage
Off ExhaustFan Damper
Off ExhaustFan Damper

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Compact Make-up Air Unit
BACnet Communication Module User Guide

ID

Name

MSV.9 Cfg_BO1_Mode

MSV.10 Cfg_ BO2_Mode

List

Description

Advanced

Configuration value for the mode of Binary output 1. Provides a dry contact signal. Off: The output is not used. ExhaustFan: The output is used to initiate the exhaust fan when the CMU starts. Damper: The output is used to open or close an inlet damper based on the command to enable or turn on/off the CMU.

Advanced Same description as MSV.9

MSV.11 Cfg_StaticPressureSensorRange Advanced Select the range of the static pressure sensor in Pascal.

MSV.12 Cfg_AI1_SignalRange

Advanced Configuration value to select the signal type range for analog input 1.

MSV.13 Cfg_AI2_SignalRange

Advanced Configuration value to select the signal type range for analog input 2.

MSV.14 Cfg_AO1_SignalRange

Advanced Configuration value to select the signal type range for analog output 1.

MSV.15 Cfg_AO2_SignalRange MSV.16 Cfg_TempControlSource MSV.17 Cfg_TempSetpointSource
MSV.18 Cfg_AdditionalDisplay

Advanced Configuration value to select the signal type range for analog output 2.

Advanced Integrator Advanced

Configuration value of the temperature control source. SAT: The source will be provided from the supply air temperature sensor connected to the AI on the add-on board. RAT: The source will be provided from the room temperature sensor (TDF).
Configuration value of the temperature setpoint source. OnBoard: The source will be provided from the on-board potentiometer. Tstat: The source will be provided from the TDF. Network: The source will be provided from the value written over the network.
Configuration value of the second line of display on the TDF. None: No value is displayed. Time: It displays the current time in the machine. CO2: It displays the CO2 reading (only applicable if TDF with CO2 sensor is used). SARH: It displays the supply air relative humidity (if connected and configured). RAT: It displays the room temperature value.

W? Present Value
Present Value Present Value Present Value Present Value Present Value Present Value Present Value Present Value
Present Value

Notes
Off ExhaustFan Damper
Off ExhaustFan Damper 250 500 1250
2-10Vdc 0-10Vdc
2-10Vdc 0-10Vdc
2-10Vdc 0-10Vdc
2-10Vdc 0-10Vdc
SAT RAT
OnBoard Tstat Network
None Time CO2 SARH RAT

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Page | 16

ID

Name

MSV.19 Cfg_TemperatureDisplayed

MSV.20 Reset_reason

Compact Make-up Air Unit
BACnet Communication Module User Guide

List Integrator

Description
Configuration value of the temperature value to display. Default: Defaults to the sensor selected for control. Alternate: The value displayed alternates between the value on the TDF and the duct sensor (CMU outtake). SAT: The value displayed is the supply air temperature reading configured on the add-on board. Tstat: The value displayed is the room temperature reading measured on the TDF.

Advanced Displays the reason for the previous system reset.

W? Present Value
Read only

Notes
Default Alternate SAT Tstat
noReason independentWatchdog windowWatchdog softwareReset powerDown

Other
Table 11 - Object Table Information: Other

ID

Name

FIL.1 CMU-COM Update

PGM.1 CMU-COM Process

List Advanced Advanced

Description
Firmware binary file. Set the File Size to 0 to erase the previous binary file before uploading a new one. Use only the binary file provided by Neptronic.
Program firmware. Set to LOAD to program the file in application memory. The controller will be reset and the firmware will be LOADED into the memory. Use only the binary file provided by Neptronic.

SCH.1 OccupancySchedule

Integrator

Weekly occupancy schedule to specify which occupancy state is active during specific periods of day.

W?
File Size Archive
Program Change
Weekly Schedule Schedule Default Priority for Writing Effective Period
Out of Service

Notes
File Size is accepted for 0 value only.
Program Change, only LOAD (1) and RESTART (4) are supported.

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Page | 17

Notes

400 Lebeau blvd, Montreal, Qc, H4N 1R6, Canada www.neptronic.com
Toll free in North America: 1-800-361-2308 Tel.: (514) 333-1433 Fax: (514) 333-3163
Customer service fax: (514) 333-1091 Monday to Friday: 8:00am to 5:00pm (Eastern time)



References

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