BACnet MS/TP Interface User s Guide

PoolPak MPK with CommandPak Control System CPCS BACnet MS/TP Interface User s Guide DOCUMENT #: SVW07-BACNET-MSTP-20171020 UPDATED: OCTOBER 2017

INTRODUCTION PoolPak dehumidifiers equipped with an CommandPak Control System can be directly connected to a BACnet MS/TP based Building Automation System (BAS). Based on Carel s pconet serial card, the interface allows connection to an RS-485 network. 80 control points, including all basic information and set points for the PoolPak dehumidification system, are available through the interface. BACNET CONFIGURATION PARAMETERS The BACnet configuration parameters for the controller are accessed in the configuration menu. To access this menu: 1. Press the program key ( ) on the RIU or CM1 module 2. Scroll down to Service then press Enter ( ). 3. Scroll up for the service password 0005, then press Enter ( ). 4. Scroll down to Unit Config then press Enter ( ). 5. Scroll down for the advanced password of 9995, then press Enter ( ). 6. Use the arrow keys to scroll down to BAS Interface, then press Enter ( ). 7. Press the Enter key to move the cursor to different fields. Use the arrow keys to change the following parameters as needed: TYPE BACnet This is the type of BAS system connecting. BAUD RATE 19200 Sets the baud rate for the onboard serial port. It must be set to 19200 for use with the BACnet interface. 19200 is the factory default setting for this parameter. Note that this is the baud rate of the internal serial interface between the BACnet board and the PoolComPak controller. The baud rate of the BACnet MS/TP connection is set with a utility program from Carel. See the Interface Card Field Setup and Configuration section of this document for more information. BAS Addr 001 Sets the address of the BACnet interface card in the serial slot of the controller. It must be set to 1 for proper operation of the BACnet interface. The factory default setting is 1. Note that this is the internal serial address of the BACnet board. The station address for the BACnet MS/TP network is set with a utility program from Carel. See the Interface Card Field Setup and Configuration section of this document for more information. 8. After changing any of the above parameters, reboot the controller by cycling power with the unit control power switch. This switch is located within or adjacent to the main control panel of the dehumidifier. INTERFACE CARD FIELD SETUP AND CONFIGURATION The BACnet interface card is shipped from the factory with the following default settings: BACnet ID (Device Instance): 77000 BACnet baud: 38400bps BACnet MAC: 020 Max Masters: 127 Max Frames: 00020 2017 PoolPak LLC. All rights reserved. Page 2

Change the above card settings on the controller or keypad as follows: 1. Press and hold the Alarm ( ) and Enter ( ) keys. 2. Arrow down to Other Information then press Enter ( ) 3. Arrow down to PCOWEB/NET CONFIG then press Enter ( ) 4. Arrow down to PCONET, then press Enter ( ). (PCOWEB is for IP) 5. Use the Enter ( ) key to move the cursor to the value you need to change. Use the arrow keys to change the value. 6. The last screen will say pconet CONFIG ENABLE, then Update pconet? Select YES then press Enter ( ). 7. After changing any of the above parameters, reboot the controller by cycling power with the unit control power switch. For any difficulty changing these parameters, contact PoolPak Service at 800-959-7725 for assistance. PHYSICAL NETWORK CONNECTION The three wire RS-485 connection is located on the pconet interface card. The pconet card occupies the serial card slot in the CM1 control module. This control module is located in the main control panel of the PoolComPak dehumidifier. Be sure to observe proper network polarity when making the connection to the BACnet network. The terminals on the pconet board are labeled clearly on the serial card cover. The RS-485 connection to the interface card should comply with standard installation practices. Use care to route the cable away from sources of interference and adhere to standard cable length and network topography restrictions for a BACnet MS/TP network. The pconet board contains built-in termination resistors that can be enabled by jumpers P1, P2, and P3. The jumpers have the following functions: P1 Adds a 510 ohm resistor between the negative line and GND. P2 Adds a 120 ohm resistor between the positive and negative data lines. P3 Adds a 510 ohm resistor between the positive line and the +5VDC internal bus. The jumpers are all installed by default at the factory. In most installations, all three jumpers should be installed if the pconet board resides at either end of the RS-485 network. If instead, it is located between other nodes on the network, all three jumpers should be disconnected to disable the termination resistors. CONTROL POINTS MAPPING 80 objects are accessible through the BACnet interface. Set points, sensor values, and enumerated variables are shared as analog-value objects. Status information points are shared as binary-value objects. The interface card is pre-configured at the factory with a device instance number of 77000. To change this value, follow the instructions shown in the Interface Card Field Setup and Configuration section of this document. The following table lists the available points along with their object types and instance numbers. TYPE READ/ WRITE INSTANCE NAME DESCRIPTION UNITS AV R 1 CPR1_xwfCprCur System 1 Cmpr Current Amps AV R 2 CPR2_xwfCprCur System 2 Cmpr Current Amps AV R 3 CPR3_xwfCprCur System 3 Cmpr Current Amps AV R 4 xwfairoffevprelhum Air Leaving Evap Rel Humidity (RH) % AV R 5 xwfairoffevptmp Air Leaving Evap Temperature C AV R 6 xwfauxaircoolpercent Aux Air Cooling Percent Output % 2017 PoolPak LLC. All rights reserved. Page 3

BACnet Points List continued TYPE READ/ WRITE INSTANCE NAME DESCRIPTION UNITS AV R 7 xwfauxairheatpercent Actual Aux Air Heating % Output % AV R 8 xwfauxairheatpercent_1 Calc Aux Air Heating % Output % AV R 9 xwfexhairvol Exhaust Air Volume CFM AV R 10 xwfexhfancur Exhaust Fan Current Amps AV R 11 xwfmixboxpctopen Mixing Box Position % AV R 12 xwfoutairdewpoint Outside Air Dewpoint C AV R 13 xwfoutairrelhum Outside Air RH % AV R 14 xwfoutairtmp Outside Air Temperature C AV R 15 xwfoutairvol Outside Air Volume CFM AV R 16 xwfoutdprfbk Outside Air Damper Position % AV R 17 xwfpool1wtrtmp Pool1 Water Temperature C AV R 18 xwfpool2wtrtmp Pool2 Water Temperature C AV R 19 xwfpurairvol Purge Air Volume CFM AV R 20 xwfpurfancur Purge Fan Current Amps AV R 21 xwfrtnairdewpoint Return Air Dewpoint C AV R 22 xwfrtnairrelhum Return Air RH % AV R 23 xwfrtnairtmp Return Air Temperature C AV R 24 xwfsetevtminmixboxpos Event Min Mix Box Position % AV R 25 xwfsetmaxmixboxpos Max Mix Box Position % AV R 26 xwfsetminmixboxpos Min Mix Box Position % AV R 27 xwfsetpool1wtrtmp Pool1 Water Temp Setpoint F AV R 28 xwfsetpool2wtrtmp Pool2 Water Temp Setpoint F AV R 29 xwfsetrtnairrelhum Return Air RH Setpoint % AV R 30 xwfsetrtnairtmp Return Air Temp Setpoint F AV R 31 xwfsupairtmp Supply Air Temperature C AV R 32 xwfsupairvol Supply Air Volume CFM AV R 33 xwfsupfancur Supply Fan Current Amps AV R 34 xwfsurtmp Surface Temperature C AV R 1001 CPR1_xwiActiveFaultCode Cmpr1 Fault Code See below AV R 1002 CPR1_xwiMode Cmpr1 Actual Mode See below AV R 1003 CPR2_xwiActiveFaultCode Cmpr2 Fault Code See below AV R 1004 CPR2_xwiMode Cmpr2 Actual Mode See below AV R 1005 CPR3_xwiActiveFaultCode Cmpr3 Fault Code See below AV R 1006 CPR3_xwiMode Cmpr3 Actual Mode See below AV W 1007 twisetinpevtminmixboxpos Event Min Mix Box Pos Setpoint % AV W 1008 twisetinpmaxmixboxpos Max Mix Box Pos Setpoint % AV W 1009 twisetinpminmixboxpos Min Mix Box Pos Setpoint % 2017 PoolPak LLC. All rights reserved. Page 4

BACnet Points List continued TYPE READ/ WRITE INSTANCE NAME DESCRIPTION UNITS AV W 1010 twisetinppool1wtrtmp Pool1 Water Temp Setpoint F AV W 1011 twisetinppool2wtrtmp Pool2 Water Temp Setpoint F AV W 1012 twisetinppurmixboxpos Purge Mode Mix Box Setpoint % AV W 1013 twisetinprtnairrelhum Return Air RH Setpoint % AV W 1014 twisetinprtnairtmp Return Air Temp Setpoint F AV R 1015 xwiauxaircoolstgrqd Aux Air Cool Requested (Rqd) Stages AV R 1016 xwiauxairheatstgrqd Aux Air Heat Stages Rqd Stages AV R 1017 xwicpr1modereq Cmpr1 Mode Requested Stages AV R 1018 xwicpr2modereq Cmpr2 Mode Requested Stages AV R 1019 xwicpr3modereq Cmpr3 Mode Requested Stages AV R 1020 xwidehstgrqd Dehumidification Stages Rqd Stages AV R 1021 xwiheatcoolstgrqd Heat/Cool Stages Rqd Stages AV R 1022 xwilastunitgnlfltcode Last Unit Fault Code See below AV R 1023 xwisengnlfltcode Sensor Fault Code See below AV R 1024 xwiunitgnlfltcode Unit Fault Code See below BV R 1 xbalarm_do Alarm Output on/off BV R 2 xbauxaircool1_do Aux Cool 1 Output on/off BV R 3 xbauxaircool2_do Aux Cool 2 Output on/off BV R 4 xbauxaircool3_do Aux Cool 3 Output on/off BV R 5 xbauxairheat1_do Aux Air Heat 1 Output on/off BV R 6 xbauxairheat2_do Aux Air Heat 2 Output on/off BV R 7 xbauxairheat3_do Aux Air Heat 3 Output on/off BV W 8 xbbasforcenopurmod Force NoPurge Mode on/off BV W 9 xbbasforceoccupied Force Occupied on/off BV W 10 xbbasforcepurmod Force Purge Mode on/off BV W 11 xbbasforceunoccupied Force Unoccupied on/off BV R 12 xbexhfan_do Exhaust Fan Output on/off BV R 13 xboccupied Occupied Mode on/off BV R 14 xbpool1auxwtrheat_do Pool1 Aux Heat Output on/off BV R 15 xbpool2auxwtrheat_do Pool2 Aux Heat Output on/off BV R 16 xbpoolwtrcndflowa Pool Water Flow Circuit A on/off BV R 17 xbpoolwtrcndflowb Pool Water Flow Circuit B on/off BV R 18 xbpurfan_do Purge Fan Output on/off BV R 19 xbpurmod Purge Mode Active on/off BV R 20 xbremexhfan_do Remote Exhaust Fan Output on/off BV R 21 xbsmartpump1_do Pool Pump Output on/off BV R 22 xbsupfan_do Supply Fan Output on/off 2017 PoolPak LLC. All rights reserved. Page 5

COMPRESSOR ACTIVE FAULT CODE AV1001, AV1003 and AV1005 are enumerated values indicating the most significant active fault in each compressor system of the dehumidifier. The present value for these objects can be decoded as follows: 0 Normal 1 Run/Pumpdown switch in pumpdown position 2 System warmup in progress. Normal for 5 minutes after power-on. 3 Liquid temperature sensor failed 4 Suction temperature sensor failed 5 Compressor current sensor failed 6 Suction pressure transducer failed 7 Discharge pressure transducer failed 13 Low refrigerant pressure detected 14 High compressor motor temperature detected 15 High refrigerant pressure detected 50 Compressor locked out due to 10 faults since last power cycle COMPRESSOR SYSTEM MODE AND MODE REQUESTED AV1002, AV1004, AV1006 (Modes) and AV1017, AV1018, AV1019 (Modes Requested) are enumerated values indicating the operation mode of the corresponding compressor system. The present value for these objects can be decoded as follows: 0 Compressor Off 1 Air Heating Mode. Recovered heat is being used to heat the air. 3 Pool Water Heating Mode. Recovered heat is being used to heat the water. 4 Air Cooling Mode. Recovered heat is being rejected to an external air or water-cooled condenser. SENSOR FAULT CODE (XWISENGNLFLTCODE) AV1023 is an enumerated value indicating a failed sensor. The value for this object is decoded as follows: 0 Normal. No sensors in failure. 1 Return air temperature 2 Return air humidity 3 Supply air temperature 4 Outside air temperature 5 Supply air CFM 6 Exhaust air CFM 7 Purge air CFM 8 Outside air CFM 9 Supply fan current signal 10 Exhaust fan current signal 11 Purge fan current signal 13 Pool 1 temperature 14 Pool water circuit A pressure drop 15 Pool 2 temperature 16 Pool water circuit B pressure drop 19 Air off evaporator temperature 2017 PoolPak LLC. All rights reserved. Page 6

20 Air off evaporator humidity 22 Evaporator bypass damper position feedback 24 Outside air damper position feedback 25 Recirc air damper position feedback 26 Space pressure 27 Return air CO2 level 28 Surface temperature 29 Outside air filter pressure drop 30 Return air filter pressure drop UNIT FAULT CODE AND LAST UNIT FAULT CODE (XWIUNITGNLFLTCODE) AV1022 and AV1024 are enumerated values indicating a general fault condition for the unit. The last fault (AV1022) indicates the most recent previous fault condition for the unit. The value for these objects is decoded as follows: 0 Normal 1 Coil freeze warning active 2 Fire trip mode active 3 Smoke purge mode active 4 Supply fan not running 5 Exhaust fan not running 6 Purge fan not running 7 Exhaust fan VFD fault active 8 Supply fan VFD fault active 9 Purge fan VFD fault active 10 System startup active Normal for 5 minutes after power on. 11 Supply fan deadheaded. Supply fan requested on with both outside air and recirc air dampers less than 25% open. 12 Aux heating system failure 13 Aux cooling system failure 14 Compressor Module 1 fault active 15 Compressor Module 2 fault active 16 Compressor Module 3 fault active CHANGING A SET POINT Two analog value objects are allocated for each set point, a readable value and a writeable value. To change a set point, set the present value of the writeable object to the new set point value. Verify that the controller accepted the change by reading the value of the corresponding readable object. The controller applies limits to the set point values. If the BAS tries to set an inappropriate value, the readable object will show the min or max allowed value instead of the requested value. The BAS can detect this event by verifying the change in the readable object s present value. The following limits are applied by the controller: Return Air Temperature: 75ºF 95ºF Return Air Humidity: 40% 65% Pool Water Temperature: 75ºF 95ºF Damper Position: 0% 100% Mixing Box Position: 0% 100% Set points for temperature are represented by integer values in degrees Fahrenheit. 2017 PoolPak LLC. All rights reserved. Page 7

CONTROLLING OCCUPANCY MODE The BAS can control the dehumidifier s Purge mode directly. This control overrides all internal schedules and controls except for the freeze protection algorithm. To force purge mode, set the xbbasforcepurmod object value to the ON state and the xbbasforcenopurmod object value to the OFF state. To force non-purge mode, set the value of the xbbasforcepurmod object to OFF and the xbbasforcenopurmod object to ON. CONTROLLING PURGE MODE The BAS can control the dehumidifier s Purge mode directly. This control overrides all internal schedules and controls except for the freeze protection algorithm. To force purge mode, set the xbbasforcepurmod object value to the ON state and the xbbasforcenopurmod object value to the OFF state. To force non-purge mode, set the value of the xbbasforcepurmod object to OFF and the xbbasforcenopurmod object to ON. ACTIVE ALARM FLAG CONTROL The xbalarm_do binary value object indicates the status of the system alarm flag. This status corresponds to the red light inside the alarm button of the control module, CM1. When the present value of this object is ON, there is an uncleared alarm present in the controller. If there are no active alarms present, the value of xbalarm_do will change to OFF. If there are still active alarms present, the value of xbalarm_do will remain ON. To determine the actual alarm condition, the BAS can examine the present value of the active fault objects. See the Fault Code sections earlier in this document for a list of possible states. INTERFACE CARD FIELD SETUP AND CONFIGURATION The BACnet interface card is shipped from the factory with the following default settings: Device Instance: 77000 Station Address: 20 MaxMaster: 127 Max Info Frames: 20 Baud Rate: 38400 APDU Timeout: 5000ms APDU Retries: 3 Password for Restart: 1234 Change the above card settings on the controller or keypad as follows: 1. Press and hold the Alarm ( ) and Enter ( ) keys. 2. Arrow down to Other Information then press Enter ( ) 3. Arrow down to PCOWEB/NET CONFIG then press Enter ( ) 4. Arrow down to PCOWEB, then press Enter ( ). (PCONET is for MS/TP) 5. Use the Enter ( ) key to move the cursor to the value you need to change. Use the arrow keys to change the value. 6. The last screen will ask to save changes. Select YES then press Enter ( ). 7. After changing any of the above parameters, reboot the controller by cycling power with the unit control power switch. For any difficulty changing these parameters, contact PoolPak Service at 800-959-7725 for assistance. 2017 PoolPak LLC. All rights reserved. Page 8

SYMPTOM POSSIBLE CAUSE SOLUTION The interface card is not properly connected to the network. Correct network wiring. The dehumidifier cannot be seen on the BACnet network. Power to the controller is off. The BAS is trying to access the interface with the wrong device instance number. If safe to do so, turn on the main disconnect and the control power switch(cps) in the control compartment of the dehumidifier. Follow the instructions in this document to set the instance number to a value appropriate for the BAS. The polarity of the network connection is reversed. Reverse the wires connected to the + and terminals on the pconet board. The variable values sent by the controller are different than those shown on the RIU. Incorrect setting of the BAS configuration parameters in the service menu. Correct the parameter values to match the settings shown in this document. Set point changes are different than requested by the BAS. Requested set point change is outside of the acceptable range. Select set points based on the acceptable range. For questions about the interface that are not answered in this document, please contact the PoolPak Service department at 800-959-7725. BACnet is a registered trademark of American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE). This trademark is used in the text, but for the sake of readability, it is not individually marked. With more than 45 years of experience in indoor pool dehumidification equipment manufacturing, PoolPak LLC is the most well-known brand in the industry. Our people and products work daily to improve the quality and comfort of indoor pool environments. PoolPak dehumidification solutions include a variety of heating, ventilation, and air conditioning systems, in addition to an industry-leading PoolPak support network. For more information, please visit www.poolpak.com. 3491 Industrial Drive York, Pennsylvania 17402 USA 800-959-7725 Fax 717-757-5085 2017 PoolPak LLC. All rights reserved. SVW07-BACNETMSTP-20171020