GREENHECK c.pCO Mini Controller User Guide

3 Command Unit Operation 1. Enable Unit 2. Control Occupancy 3. Reset Alarms 4. Global Alarm Notification 5. Control Temperature Setpoint (optional)
IVE BACnet Quick Start Guide

Object
BV-2 BV-3 BV-4 BV-23

Object Name
System_Enable BMS_Occupancy_Command Reset_All_Alarms Global_Alarm

AV-1 Temperature_Setpoint

Object Description
Master system enable/disable point. Occupancy Command Alarm Reset Command Alarm Notification (any alarm by default) Sets the active temperature set-point based on mode of operation (space setpoint, return setpoint or supply setpoint). Not applicable for outside reset.

Active Text

Inactive Text

Variable Type

Enabled

Disabled

Unoccupied

Occupied

Reset

Normal

Alarm

Normal

Default = 72°F Min = 50°F; Max = 100°F

August 2025

Document 487690 BACnet Integration Guide for Indoor Ventilator Energy Recovery
Reference Guide for BACnet Integration
Please read and save these instructions for future reference. The information in this guide assumes the controller was already configured with BACnet based on the original sales configuration. If the controller does not have BACnet enabled, please contact the equipment representative to get the necessary licensing and configuration files to allow BACnet communication to be used.

IVE_01.001 Rev 0 Document Date: 08/2025
Basic Unit Integration Below are the basic integration functions available on all equipment regardless of control mode. Some features are unit configuration dependent (heating type, cooling type, etc.). The controller’s BMS points list is static regardless of configuration to accommodate field configuration changes, however, not all points are applicable to every unit. Once the required sensors are installed in the equipment, the only mandatory requirements to make the unit operational are to enable the unit, if it has not been enabled manually at the controller, and to command occupancy as desired.

Object

Variable

Description

Active Text

Inactive Text

Unit Enable/Disable Operation

If desired, the unit can be enabled and disabled by the BMS system. In disabled mode, certain safety sequences may operate

to protect the building and/or equipment but general heating, cooling and ventilation operation will not function.

BV-2

System_Enable

Master system enable/disable command

Enabled

Disabled

Unit Occupancy Control

By default, the unit occupancy is expected to be commanded by the BMS occupancy point. Alternatively, the unit occupancy

can be controlled by an internal schedule, set to always unoccupied, always occupied or controlled by a digital input by

changing the occupancy mode selection at the controller.

If the controller is configured for warm-up/cool-down mode, after the occupancy command is received the unit will run in

unoccupied recirculation mode until reaching the occupied temperature setpoint or the warm-up/cool down time expires

(default 30 minutes) at which point the controller will enter normal occupied mode operation.

BV-3

BMS_Occupancy_Command

Building Occupancy Command

Unoccupied Occupied

Alarms

The following points allow the notification of any alarm and the last alarm triggered to be read, as well as active alarms that to

be manually reset remotely. See the unit’s full BMS points list if specific alarm monitoring or trending is desired.

BV-4

Reset_All_Alarms

Alarm Reset Command

Reset

Normal

BV-23

Global_Alarm

Global Alarm

Alarm

Normal

BV-29

Supply_Fan_1_Alarm.Active

Supply Fan Alarm Active

Alarm

Normal

BV-30

Exhaust_Fan_1_Alarm.Active

Exhaust Fan Alarm Active

Alarm

Normal

IV-5 or AV-93 LatestAlm

Most recent active alarm

See Alarm Table

Monitoring Unit Operation

Unit status

AV-40

Unit_Status_Mode

Unit Operation Mode/State

See Status Mode Table

Fans and Dampers

BI-1

Exhaust_Fan_1_Status_Digital_Input

Exhaust Fan 1 Status

Active

Inactive

BI-2

Supply_Fan_1_Status_Digital_Input

Supply Fan 1 Status

Active

Inactive

AV-73

Exhaust_Fan_Speed_Analog_Output

Exhaust Fan Speed Analog Output

Real (%)

AV-79

Supply_Fan_Speed_Analog_Output

Supply Fan Speed Analog Output

Real (%)

Cooling

IV-11 or AV-105 Cooling_is_On

Indicates that the unit is calling for cooling

See Binary Tables

Heating

IV-11 or AV-105 Heating_is_On

Indicates that the unit is calling for heating

See Binary Tables

AV-51

Heating_Capacity

Heating Ramp

Real (%)

Filters

IV-10 or AV-102 Filter_Alarm_Digital_Input

Filter Alarm Digital Input Status

See Binary Tables

Energy Recovery

IV-10 or AV-102 Heat_Wheel_Enable_Digital_Output IV-10 or AV-102 Wheel_Rotation_Alarm

Heat Wheel Enable Digital Output Heat Wheel Rotation Alarm

See Binary Tables

AV-72

Energy_Recovery_Analog_Output

Energy Recovery Analog Output

Real (%)

BACnet Integration Guide IVE_01.001 Rev 0

Page | 1

Object

Variable

Chilled Water Systems

AV-68

Chilled_Water_1_Valve_Analog_Output

Hot Water Systems

AV-74

Hot_Water_Valve_1_Analog_Output

Electric Post-Heat

AV-70

Electric_Heater_1_Analog_Output

Electric Pre-Heat

IV-10 or AV-102 PreHeat_Enable_Digital_Output

Sensor Values (when equipped)

AI-1

Space_Temp_Analog_Input

AI-2

Supply_Temp_Analog_Input

AI-3

Outside_Air_Temp_Analog_Input

AI-7

Return_Temp_Analog_Input

AI-8

Exhaust_Temp_Analog_Input

AI-9

Space_RH_Analog_Input

AI-10

Outside_RH_Analog_Input

AI-11

Return_RH_Analog_Input

AI-12

Return_Duct_Static_Pressure_Analog_Input

AI-13

Space_Static_Pressure_Analog_Input

AI-14

Supply_Duct_Static_Pressure_Analog_Input

AI-15

Space_CO2_1_Analog_Input

AI-17

Return_CO2_Analog_Input

AV-64

Total_Exhaust_Fan_CFM_BMS

AV-65

Total_Supply_Fan_CFM_BMS

AV-66

OAD_CFM_BMS

Active Setpoints

AV-41

Supply_Temperature_Calculated_Setpoint

Description
Chilled Water 1 Valve Analog Output
Hot Water Valve 1 Analog Output
Electric Heater 1 Analog Output
PreHeat Enable Digital Output
Space Air Temperature Supply(discharge) Air Temperature Outside Air Temperature Return Air Temperature Exhaust Air Temperature Space Air Relative Humidity Outside Air Relative Humidity Return Air Relative Humidity Return Duct Static Pressure Space Static Pressure Supply Duct Static Pressure Space 1 CO2 ppm Return CO2 ppm Total Exhaust Fan CFM Total Supply Fan CFM Outdoor Air Damper CFM
Active Supply Temperature Setpoint

Active Text Inactive Text
Real (%)
Real (%)
Real (%)
See Binary Tables
Real (°F) Real (°F) Real (°F) Real (°F) Real (°F) Real (% RH) Real (% RH) Real (% RH) Real (“wc) Real (“wc) Real (“wc) Real (ppm) Real (ppm) Real (cfm) Real (cfm) Real (cfm)
Real (°F)

Unpacking Bit-Packed Words into Binary Values Binary values can be combined to create an integer and/or analog words. By doing this, more information is available to the BMS in a smaller number of points and less network traffic. These following words need to be “unpacked” once the BMS receives the value.

Integer Value IV-6 IV-8 IV-9 IV-10 IV-11

Analog Values AV-94 & AV-95 AV-98 & AV-99 AV-100 & AV-101 AV-102 & AV-103 AV-104 & AV-105

Variable
Device_Enable_DO_Word Device_Offline_Word Device_Alarm_Word System_Word Unit_Status_Word

Description
Device Enable DO Word Device Offline Word Device Alarm Word System Word Unit Status Word

Reference Table
Bit Packed Word See Binary Tables

To unpack the word into the binary values, the value needs to be converted to a binary number. The integer values are 32-bit and the analog value words are 16-bit. The number of bits indicates the potential max number of variables packed into a word. Each bit can either be a 0 (Inactive) or a 1 (Active). Both the integer values and analog values contain the same information. Some building automation systems may have an easier time integrating to one type versus the other.

The BMS may have a solution already intact to pull individual bits from an integer. A “read bit” function looks to return what value a certain bit is in an integer. Bit numbers are 0-31 in a 32-bit integer and 0-15 in a 16-bit analog value with 0 being the lowest bit and the furthest to the right. Bit 31 or bit 15 would be the largest bits and the furthest to the left.
Note: Bit 31 being a value of 1 (active) will result in the integer value being a negative. 16-bit analog values will always be positive.
If the BMS does not have a “read bit” or “bit extract” function, the binary value of individual bits can be determined by continually dividing the quotient of the integer by 2, the remainder of the division is the value of the bit (0 or 1). A function called Modulo or “mod” is commonly used to return the remainder of the division.

BACnet Integration Guide IVE_01.001 Rev 0

Page | 2

Equation: x = round down(a/2b mod 2) · x is Boolean value for bit b, where 0 is inactive and 1 is active. · a is the integer word value. · b is the bit of the binary number used as an exponent. · The result of a/2b maybe a decimal value, after taking the mod 2 (remainder of the value after diving by 2) round down the result, which will truncate the decimals leaving a 0 or a 1 for the bit.

Example:

If the Unit_Status_Word integer value (IV-11) has a decimal value of 524,754, the 32-bit integer value is 1000 0000 0001 1101 0010 in binary notation. The analog values (AV-104 & AV-105) have decimal values of 466 and 8, 16-bit words are 0001 1101 0010 and 1000 binary notation. This means the unit is in Occupied Start, Dampers Open, Exhaust Fan On, Supply Fan On, System On and Energy Recovery Active (value of 1 or active). The rest of the bits in the binary number would be a Boolean value of 0 (inactive). (Please see Binary Tables.)

Breakdown with equation for 32-bit integer example:
· Bit 1 = 524,754/21 mod 2… this results in a Boolean of 1 or Active for bit 1. · Bit 4 = 524,754/24 mod 2… this results in a Boolean of 1 or Active for bit 4. · Bit 6 = 524,754/26 mod 2… this results in a Boolean of 1 or Active for bit 6. · Bit 7 = 524,754/27 mod 2… this results in a Boolean of 1 or Active for bit 7. · Bit 8 = 524,754/28 mod 2… this results in a Boolean of 1 or Active for bit 8. · Bit 19 = 524,754/219 mod 2… this results in a Boolean of 1 or Active for bit 19. · All other bits in the word result in a Boolean of 0 or Inactive.

Table of integer and analog example

Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

IV-11 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 1 1 0 1 0 0 1 0

AV-104

0 0 0 0 0 0 0 1 1 1 0 1 0 0 1 0

AV-105

0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0

Modifying Equipment Operation In addition to commanding unit occupancy, some system level sequences may require feedback from the BMS. Common BMS adjusted sequences include items like supply air temperature reset control, demand control ventilation for multiple zones, and duct static pressure reset.

HEATING AND COOLING OPERATION SETPOINTS

Adjusting Temperature Setpoints

Controller Provided Sequences Occupied Mode

The controller has several stand-alone supply air temperature control modes with setpoints that can be modified by the BMS. These modes include a

static supply air temperature setpoint (no-reset) or allows for the supply air temperature setpoint to be reset based on outside air temperature, space

temperature, or return air temperature.

Object

Variable

Description

Default and Ranges

IV-1 Temperature_Reset_Mode

Commands the reset mode during occupied operation.

1 = No Reset, 2 = Space Reset 3 = Return Reset, 4 = Outside Reset

Sets the temperature setpoint based on mode

AV-1 Temperature_Setpoint

of operation (space setpoint, return setpoint or supply setpoint).

Real, Default = 72°F *Min = 50°F; Max = 100°F

Not applicable for outside reset.

Heat/Cool Setpt Deadband when Space or

Real, Default = 4°F

AV-2 Temperature_Heat_Cool_Deadband

Return reset control is active. Htg Setpt = Temp Setpt – Deadband /2

*Min = 0.5°F; Max = 20°F [Space/Return Heating = 70°F,

Clg Setpt = Temp Setpt + Deadband /2

Space/Return Cooling = 74°F]

* Typical range for standard configuration unit, please verify at point min and max properties.

BACnet Integration Guide IVE_01.001 Rev 0

Page | 3

Controller Provided Sequences Unoccupied Mode

When the unoccupied mode of operation is set to night setback temperature, normal operation with unoccupied setpoints, or recirculation with

unoccupied setpoints, the following setpoints control unoccupied heating and cooling operation. If night setback is selected as the Unoccupied Mode

of operation, the reset mode will not be available to change at the controller and should be set to Space Reset(2).

Object

Variable

Description

Default and Ranges

IV-2 Temperature_Reset_Mode_Unoccupied

Commands the reset mode during occupied operation.

1 = No Reset, 2 = Space Reset 3 = Return Reset, 4 = Outside Reset

Sets the temperature setpoint based on mode

AV-3 Temperature_Setpoint_Unoccupied

of operation (space setpoint, return setpoint or supply setpoint).

Real, Default = 70°F *Min = 50°F; Max = 100°F

Not applicable for outside reset.

Heat/Cool Setpt Deadband when Space or

Return reset control is active.

Real, Default = 20°F

AV-4

Temperature_Heat_Cool_Deadband_Unoccupied

Unooc Clg Setpt = Temp Setpt Unocc + (Deadband Unocc)/2

*Min = 0.5°F; Max = 40°F [Space/Return Heating = 60°F,

Unocc Htg Setpt = Temp Setpt Unocc +

Space/Return Cooling = 80°F]

(Deadband Unocc)/2

BMS Controlled Sequences BMS control over reset write to temp setpoint and have mode in No reset. * Typical range for standard configuration unit, please verify at point min and max properties.

AIRFLOW OPERATION SETPOINTS

Airflow Setpoints

Airflow operation of supply fan, exhaust fan, and mixing dampers may use setpoints from duct pressure, space pressure, CO2 sensors, or airflow measuring stations to properly control airflow in an application. The Outside Air Damper Minimum Setpoint Occupied applies to all units with

modulating outside air dampers. The setpoint is used to establish an absolute minimum position for ventilating the space while allowing other control

modes to open the damper further as necessary. Outdoor and recirculating air dampers operate inversely using the same signal.

Object

Variable

Description

Default and Ranges

AV-21 Return_Duct_Static_Pressure_Setpoint AV-22 Space_Static_Pressure_Setpoint AV-23 Supply_Duct_Static_Pressure_Setpoint AV-24 Space_CO2_Setpoint

Return Duct Static Pressure Setpoint Space Static Pressure Setpoint Supply Duct Static Pressure Setpoint Space CO2 Setpoint

Default = -2.0″wc Min = 0.0″wc; Max = -5.0″wc
Default = 0.05″wc Min = -0.5″wc; Max = 0.5″wc
Default = 1.0″wc Min = 0.0″wc; Max = 5.0″wc
Default = 1,000 ppm
Min = 0 ppm; Max = 5,000 ppm

BMS Enabled Control

BMS WATCHDOG

When directly commanding fans speeds, damper positions, or sending sensor values, the unit controller requires the BMS Watchdog point to be written to on a recurring basis. This tells the unit controller that the BMS is still actively communicating.

BMS Watchdog

The BMS Watchdog must be written to True (1) regularly to verify communication is established between the unit controller and the BMS headend

system. If the BMS Watchdog value remains False(0) for longer than the Timeout Delay (15 minutes, adjustable), an alarm is generated and the

controller falls back to local control and sensor values, as applicable, instead of using BMS commanded values.

Object

Variable

Description

Active Text

Inactive Text

BV-1 BMS_Watchdog

BMS Watchdog command

Active

Inactive

BV-24 BMS_Watchdog_Active

Status of the BMS watchdog ping.

Active

Inactive

BACnet Integration Guide IVE_01.001 Rev 0

Page | 4

CONTROLLING AIRFLOW DEVICES
If desired, the speeds and positions of airflow devices can be controlled directly using BACnet commandable points. To control the devices via the BMS, the BMS Watchdog requirements must be satisfied.

Fan Controls

Fan speeds can be controlled directly though BMS points. The binary points enable the BMS to take control and the analog values command the

speeds as a percentage between the allowed minimum and maximum values set in the controller.

Supply Fan

Object

Variable

Description

Active Text

Inactive Text

BV-17 SF_Control_Source_BMS

Allows the BMS to control supply fan speed

BMS

Local

AV-36 SF_Control_Signal_BMS

Supply Fan Command Speed

Real (%) *Min=50%; Max=100%

Exhaust Fan

BV-18 EF_Control_Source_BMS

Allows the BMS to control exhaust fan speed

BMS

Local

AV-37 EF_Control_Signal_BMS

Exhaust Fan Command Speed

Real (%) Min=25%; Max=100%

SENDING SENSOR VALUES
Sensor values required for sequence operation can be sent to the controller over dedicated BMS points in place of a sensor wired to the controller (local sensor). When values are communicated to the controller over BMS, the BMS Watchdog must be satisfied. If the watchdog is not satisfied, the controller reverts to the local sensor (if installed and valid) to control the unit or falls back to local control until the BMS watchdog is satisfied.

Object

Variable

Description

Active Text

Inactive Text

BMS Writeable Sensor Values

To write the sensor values over BMS, first command the controller to use the BMS value using the corresponding binary value and then use the

corresponding analog value to send the sensor value.

Sensor Sources

BV-7 Outside_RH_Source_BMS

Outside RH Source Selection

BMS

Local

BV-8 Outside_Temp_Source_BMS

Outside Temp Source Selection

BMS

Local

BV-9 Return_RH_Source_BMS

Return RH Source Selection

BMS

Local

BV-10 Return_Temp_Source_BMS

Return Temp Source Selection

BMS

Local

BV-11 Space_1_CO2_Source_BMS

Space 1 CO2 Source Selection

BMS

Local

BV-12 Space_2_CO2_Source_BMS

Space 2 CO2 Source Selection

BMS

Local

BV-13 Return_CO2_Source_BMS

Return CO2 Source Selection

BMS

Local

BV-14 Space_RH_Source_BMS

Space RH Source Selection

BMS

Local

BV-15 Space_Static_Source_BMS

Space Static Source Selection

BMS

Local

BV-16 Space_Temp_Source_BMS

Space Temp Source Selection

BMS

Local

Sensor Values

AV-26 Outside_RH_from_BMS

Outside RH from BMS.

Real (% RH)

AV-27 Outside_Temp_from_BMS

Outside Temp from BMS

Real (°F)

AV-28 Return_RH_from_BMS

Return RH from BMS

Real (% RH)

AV-29 Return_Temp_from_BMS

Return Temp from BMS

Real (°F)

AV-30 Space_1_CO2_from_BMS

Space 1 CO2 from BMS

Real (ppm)

AV-31 Space_2_CO2_from_BMS

Space 2 CO2 from BMS

Real (ppm)

AV-32 Return_CO2_from_BMS

Return CO2 from BMS

Real (ppm)

AV-33 Space_RH_from_BMS

Space RH from BMS

Real (% RH)

AV-34 Space_Static_from_BMS

Space Static from BMS

Real (“wc)

AV-35 Space_Temp_from_BMS

Space Temp from BMS

Real (°F)

Menu Structure Reference Main Menu Control Variables Advanced Network Settings Advanced Settings

Advanced BACnet Settings
Additional settings can be accessed in the BACnet Advanced Settings menu including BACnet Broadcast Management Device (BBMD) configuration, relinquish default settings, Change of Value (COV) increments and restoring binary text values.

BACnet Integration Guide IVE_01.001 Rev 0

Page | 5

BBMD CONFIGURATION

To configure the controller to operate with a BACnet Broadcast Management Device (BBMD) on IP networks, go to the advanced BACnet settings menu and enter the IP address of the BBMD, foreign device configuration, and time to live settings.

COV INCREMENTS RELINQUISH DEFAULT SETTINGS
BINARY TEXT

BACnet COV is an optional portion of BACnet that supports providing new values/information only after an increase or decrease of the value is at least the listed COV increment. The controller’s COV increments are based on the unit of measure. All variables with the same unit of measure share the same COV increment value. Values can be adjusted on this screen, or by writing to the COV increment property of any BACnet object.
When the Return to Default function is enabled, the present value will not overwrite the relinquish default value and on a loss of power the controller will boot with last saved default values instead of last written values. This must also be enabled for the BACnet Comm Loss relinquish default to work.
When the Enable Relinquish Default function is enabled any value in the priority array for binary values or analog values will be cleared if a communication loss is detected. All commandable points will revert to the relinquish default value.
Communication loss is determined based on the BMS Watchdog. The watchdog function must be enabled. The function will execute 5 minutes after the watchdog status goes inactive.
This may be desired if the BMS is running a reset routine on the setpoints and would like to revert to a default state if communication is lost. It is recommended to be used with return to default enabled, and a known relinquish default is saved. When this box is checked by a user, the controller will write the present value of variables to the relinquish default for all binary and analog value BACnet objects that are commandable. The function operates in the background and takes approximately 30 seconds to complete.
This is desired to save any Test and Balance settings adjusted locally on the controller to be the BACnet relinquish default values. Alternatively, these values could be read and written to the relinquish default variables by the BMS system.
If for any reason, the state text is missing from binary objects, checking this box will cause the controller to re-write the active and inactive text values.

BACnet Integration Guide IVE_01.001 Rev 0

Page | 6

IVE Reference Tables

STATUS MODE TABLE
The following analog values can appear in the point to tell the building automation the current mode of operation of the unit. Values may rotate every three seconds.

Analog Value
0 1 2 3 5 6 7 8 9 10 11 12

Mode
Standby Unoccupied Start Occupied Start Opening Dampers Dampers Open Fan Start Delay Exhaust Fan Start Supply Fan Start Startup Delay System On Soft Shutdown System Disabled

Status Mode Table (AV-40)

Analog Value

Mode

13 Remote Off (S1 Open)

14 System Shutdown Alarm

15 Pressurization Only

16 Exhaust Only

17 Fans Only Purge

18 Not Applicable

19 Fans Only

20 Economizing

21 Cooling

22 Heating

23 Not Applicable

24 Exhaust Econ Active

Analog Value
25 26 27 28 29 30 31 33 34 35 36 37

Mode
HGRH Purging Energy Recovery Defrost Active Not Applicable Not Applicable Not Applicable Overrides Expansion Offline Energy Recovery Active Not Applicable Morning Sequence Active Not Applicable Winter Ramp Active

ALARM TABLE This table displays the latest alarm that is active in the unit controller.

LatestAlm (Alarm) Table (BACnet IV-5/AV-93)

0 Supply Fan 1 Run – Status Not Proven 1 Freeze Protection – Thermostat Tripped 2 High Supply Duct – Static Pressure 3 Low Return Duct – Static Pressure 4 Outside Air Temp – Sensor Value Not Valid 5 Supply Air Temperature – Sensor Value Not Valid 9 Exhaust Air Temp – Sensor Value Not Valid 10 Mixed Air Temperature – Sensor Value Not Valid 11 Return Air Temperature – Sensor Value Not Valid 12 Space Temperature – Sensor Value Not Valid 13 Return Air RH – Sensor Value Not Valid 14 Space RH – Sensor Value Not Valid 15 Outside RH – Sensor Value Not Valid 24 Damper End Switch Fail – Dampers are not open 25 Exhaust Fan 1 Run – Status Not Proven 26 Filters are Dirty – Replace Filters 27 Cond Drain Pan Full – Check Drain 28 Exp Board 1 Status – Board is Offline 29 Exp Board 2 Status – Board is Offline 30 Exp Board 3 Status – Board is Offline 31 Exp Board 4 Status – Board is Offline 32 BMS Frequent Writes – Reduce Num of Writes 33 Space 1 CO2 – Sensor Value Not Valid 34 Space Static Pressure – Sensor Value Not Valid 35 Supply Duct Stat Press – Sensor Value Not Valid 36 Return Duct Stat Press – Sensor Value Not Valid 39 Outside Damper AFMS – Sensor Value Not Valid 40 Space Setpt Adj Slider – Sensor Value Not Valid 41 Space 2 CO2 – Sensor Value Not Valid 42 Return CO2 – Sensor Value Not Valid 63 Supply Air Temperature – Low Limit Shutdown 64 Heat Wheel Rotation – Not Detected

65 Secondary Unit Offline – Unit 1 66 Secondary Unit Offline – Unit 2 67 Secondary Unit Offline – Unit 3 68 Secondary Unit Offline – Unit 4 69 Primary Unit Offline 71 Multi Devices per Ch – Contact Tech Support 74 Shutdown Contact – In Alarm Position 75 Comp Maint Alarm – Run Hours Spt Reached 76 Supply Air Temperature – High Limit Shutdown 77 Space High Static Pres – Shutdown 78 Internal Board Temp – Exceeds -40F or 158F 79 BMS Offline – Watchdog is FALSE 81 Sup Air Setpt Input – Value is not valid 82 BACnet License – Not Installed 133 Space Thermostat 1 – Sensor Offline 134 Space Thermostat 2 – Sensor Offline 135 Space Thermostat 3 – Sensor Offline 136 Space Thermostat 4 – Sensor Offline 157 Outside Air Greentrol – Offline or Flow Error 158 Exhaust Air Greentrol – Offline or Flow Error 159 Supply Air Greentrol – Offline or Flow Error 169 ER Wheel High – Differential Pressure 170 OA Damper Fault – Not Econ and should be 171 OA Damper Fault – Econ and shouldn’t be 172 OAD Fault – Damper not Modulating 173 OAD Fault – Excess Outdoor Air 176 Supply Fan – VFD Offline 177 Exhasut Fan – VFD Offline 181 SF VFD Alarm – Check VFD 182 EF VFD Alarm – Check VFD 188 Fire Shutdown Alarm – Building Fire Alarm 189 EA Damper End Switch – Damper is not open

BACnet Integration Guide IVE_01.001 Rev 0

Page | 7

BIT-PACKED WORD TABLES The following tables are used to unpack integer and real words into Boolean values. (0 = Inactive; 1 = Active)

Device_Enable_DO_Word Table (IV-6/AV-94 & AV-95)

IV IV Bit AV AV Bit

Bit Description

IV IV Bit AV AV Bit

Bit Description

0 Compressor 1 Start

1 Compressor 2 Start

16 95

0 Not Applicable

1 Not Applicable

2 Not Applicable

3 Not Applicable

4 Supply Fan Start

5 Exhaust Fan Start

8 Not Applicable

9 Not Applicable

10 Not Applicable

12 Not Applicable

13 Not Applicable

14 Not Applicable

Device_Offline_Word Table (IV-8/AV-98 & AV-99)

IV IV Bit AV AV Bit

Bit Description

IV IV Bit AV AV Bit

Bit Description

0 Space TStat 1 Offline

1 Space TStat 2 Offline

8 16 99 0

2 Space TStat 3 Offline

3 Space TStat 4 Offline

4 VFD Offline Supply Fan

5 VFD Offline Exhaust Fan

8 Expansion Board 1 Alarm

9 Expansion Board 2 Alarm

10 Expansion Board 3 Alarm

11 Expansion Board 4 Alarm

11 Primary Unit Offline Alarm

12 Secondary Unit 1 Offline Alarm

13 Secondary Unit 2 Offline Alarm

14 Secondary Unit 3 Offline Alarm

15 Secondary Unit 4 Offline Alarm

Device_Alarm_Word Table (IV-9/AV-100 & AV-101)

IV IV Bit AV AV Bit

Bit Description

IV IV Bit AV AV Bit

Bit Description

0 100 0 Not Applicable

16 101 0 Space CO2 Sensor Alarm

1 Space RH Sensor Alarm

2 Mixed Temperature Sensor Alarm

2 Space Static Pressure Sensor Alarm

3 Supply Duct Static Pressure Sensor Alarm

3 Space Temperature Sensor Alarm

4 Not Applicable

5 Supply Air Temp Sensor Alarm

6 Not Applicable

7 Exhaust Temperature Sensor Alarm

8 Outside Air Temp Sensor Alarm

8 Not Applicable

9 Outside RH Sensor Alarm

10 Not Applicable

10 SF VFD Alarm

11 Greentrol OAD AFMS Alarm

11 EF VFD Alarm

12 Return CO2 Sensor Alarm

13 Return Duct Static Pressure Sensor Alarm

14 Return Temperature Sensor Alarm

14 Greentrol Exhaust AFMS Alarm

15 Return RH Sensor Alarm

15 Greentrol Supply AFMS Alarm

BACnet Integration Guide IVE_01.001 Rev 0

Page | 8

System_Word (IV-10/AV-102 & AV-103)

IV IV Bit AV AV Bit

Bit Description

IV IV Bit AV AV Bit

Bit Description

10 0 102 0 Heat Wheel Enable

1 Preheat Enable

10 16 103 0 Shutdown Input Alarm

1 Energy Recovery Wheel High Diff Pressure

2 Reversing Valve (Cooling (0)/Heating(1))

2 Energy Recovery Wheel Rotation Alarm

4 OA Damper End Switch Alarm

4 Not Applicable

5 EA Damper End Switch Alarm

5 BMS Frequent Writes – Reduce Num of Writes

6 Supply Temp Low Limit Alarm

6 BMS Offline Alarm

7 Supply Temp High Limit Alarm

8 Supply High Duct Static Alarm

9 Supply Fan 1 Alarm

10 Exhaust Fan 1 Alarm

11 Drain Pan Alarm

12 Freeze Stat Alarm

13 Filter Alarm

14 Space High Static Alarm

15 Return Low Static Alarm

Unit_Status_Word Table (IV-11/AV-104 & AV-105)

IV IV Bit AV AV Bit

Bit Description

IV IV Bit AV AV Bit

Bit Description

11 0 104 0 Standby

1 Occupied Start

2 Unoccupied Start

3 Opening Dampers

4 Dampers Open

5 Fan Start Delay

6 Exhaust Fan On

7 Supply Fan On

8 System On

9 Soft Shutdown

10 System Disabled

11 Remote Off

12 System Shutdown Alarm

13 Supply Fan Only

14 Exhaust Fan Only

11 16 105 0 Not Applicable

1 Fans Only

2 Economizing

3 Energy Recovery Active

4 Cooling

5 Heating

6 Not Applicable

7 Not Applicable

8 Not Applicable

9 Not Applicable

10 Energy Recovery Defrost Active

11 Not Applicable

12 Morning Warm Up/Cool Down Active

13 Winter Ramp Active

15 Purge Mode (Supply and Exhaust Only)

15 Overrides Active

BACnet Integration Guide IVE_01.001 Rev 0

Page | 9

Documents / Resources

GREENHECK c.pCO Mini Controller [pdf] User Guide
IVE_01.001, c.pCO Mini Controller, c.pCO, Mini Controller, Controller

References

User Manual

c.pCO Mini Controller

Product Information

Specifications:

Product Usage Instructions

Menu Structure Reference

Object Descriptions:

Frequently Asked Questions (FAQ)

Q: How to enable/disable the unit by the BMS system?

Q: What are the default occupancy control settings?

Documents / Resources

References

Leave a comment

Cancel reply