Carrier RTU Open v3 Integration Manual
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Carrier RTU Open v3 Integration Manual

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CARRIER CORPORATION ©2016
A member of the United Technologies Corporation family · Stock symbol UTX · Catalog No. 11-808-521-01 · 2/22/2016
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Summary of Contents for Carrier RTU Open v3

  • Page 1 CARRIER CORPORATION ©2016 A member of the United Technologies Corporation family · Stock symbol UTX · Catalog No. 11-808-521-01 · 2/22/2016...
  • Page 2 Verify that you have the most current version of this document from www.hvacpartners.com or your local Carrier office. Important changes are listed in Document revision history at the end of this document. CARRIER CORPORATION ©2016. All rights reserved throughout the world. i-Vu is a registered trademark of Carrier Corporation.

  • Page 3: Table Of Contents

    Contents Introduction .................................. 1 What is the RTU Open controller? ........................1 Safety considerations & handling warning ....................... 3 Wiring inputs and outputs ............................4 Communications wiring .............................. 6 Protocol overview ..............................6 BACnet MS/TP ..............................7 To set up the RTU Open for BACnet MS/TP ..................7 Troubleshooting BACnet MS/TP ......................
  • Page 4 Contents Appendix A: Network Points List for RTU Open ...................... 35 Network points list for BACnet and Modbus ....................35 Network points list for N2 and LonWorks ...................... 43 Appendix B: BACnet Protocol Implementation Conformance Statement ............46 Appendix C: Modbus Protocol Implementation Conformance Statement............47 Appendix D: Johnson N2 Protocol Implementation Conformance Statement ............

  • Page 5: Introduction

    Introduction What is the RTU Open controller? The RTU Open controller (part# OPN-RTUM2) is available as an integrated component of a Carrier rooftop unit, or as a field-installed retrofit product. NOTE The RTU Open controller is available in both English or Metric units. The metric version has (-M) appended to the part number.
  • Page 6 Introduction RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide All rights reserved...

  • Page 7: Safety Considerations & Handling Warning

    • Do not touch components or leads. • Handle the board by its edges. • Isolate from high voltage or electrostatic discharge. • Ensure that you are properly grounded. RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide...

  • Page 8: Wiring Inputs And Outputs

    N/A - Relay Heat 2 (W2) Output BO - 3 N/A - Relay Heat 1 (W1) Output BO - 4 N/A - Relay Cool 2 (Y2) Output RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide All rights reserved...
  • Page 9 N.C. contact must be used as a primary safety device for approved fire shutdown operation. N.O. contact for monitoring only. If a function other the default is used, do NOT connect wires from J1-x. RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016...

  • Page 10: Communications Wiring

    Select Baud (Default) Modbus Slave Unused Select Baud Select Baud Slave Unused Lonworks Unused Baud Selection Table Baud Rate SW3/DS2 SW3/DS1 9,600 19,200 38,400 (Default) 76,800 RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide All rights reserved...

  • Page 11: Bacnet Ms/Tp

    The BACnet device instance is automatically generated based on the scheme 16101xx, where “16” is the BACnet vendor ID for Carrier Corporation, and xx equals the rotary switch address. EXAMPLE To set the controller’s MS/TP MAC address to 01, point the arrow on the MSB (SW1) switch to 0 and the arrow on the LSB (SW2) switch to 1.

  • Page 12: Troubleshooting Bacnet Ms/Tp

    Communications wiring The following example shows the DIP switches set for 76.8k (Carrier default), and MS/TP. Connect the MS/TP network to the controller's J19 port. Connect to Net+, Net-, and SHLD. Wire specifications A dedicated 22 AWG shielded twisted pair wire (EIA 485) ○...

  • Page 13: Modbus

    Using the rotary switches, set a unique Modbus slave address for the RTU Open. Set the MSB (SW1) switch to the tens digit of the address, and set the LSB (SW2) switch to the ones digit. Valid Modbus slave addresses are 01-99. RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016...
  • Page 14 The following example shows the DIP switches set for 9600 baud and Modbus. Connect the Modbus EIA-485 network to the RTU Open's J19 port. Connect to Net+, Net-, and SHLD. RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016...

  • Page 15: Troubleshooting Modbus

    Slave Device The Modbus Master has attempted to write to a non- Failure existent register or a read-only register in the controller. RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide All rights reserved...

  • Page 16: Johnson N2

    SW3 Protocol Switch Settings for N2 The following example shows the DIP switches set for 9600 baud and N2. Connect the N2 EIA-485 network to the controller's J19 port. Connect to Net+, Net-, and SHLD. RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016...

  • Page 17: Troubleshooting N2

    • Refer to Appendix A (page 35) for the Network Points list. • Refer to Appendix D (page 49) for the Protocol Implementation Conformance Statement. RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide All rights reserved...

  • Page 18: Lonworks

    Set the Comm Selector DIP switch DS7 on SW3 to the ON position to enable the LON-OC. Leave Comm Selector DIP switch DS8 on SW3 in the OFF position since it is not used. SW3 Protocol Switch Settings for LonWorks RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016...

  • Page 19: Commissioning The Controller For Lonworks Communication

    A network management tool such as Echelon’s LonMaker is used to commission each device, as well as, to assign addressing. Specific instructions regarding the commissioning of LonWorks devices should be obtained from documentation supplied with the LonWorks Network Management Tool. RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016...

  • Page 20: Troubleshooting Lonworks

    Verify that the BAS is connected properly to the LonWorks Option Card's 2-wire TP/FT-10 Net port, which is polarity insensitive. The BAS may have to configure jumper or DIP switches on their end to support TP/FT-10. RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016...

  • Page 21: Start-Up

    If you are not sure of the wiring polarity, use a USB isolator between the computer and the USB Link. Purchase a USB isolator online from a third-party manufacturer. RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016...

  • Page 22: Sequence Of Operation

    • Heat pump units utilizing a reversing valve output for heating and cooling control • Heat pump unit (Carrier) with an OEM defrost control board • Economizer, CO2, Demand Limiting, and RH control strategies are available for appropriately equipped units •...

  • Page 23: Supply Fan

    • The indoor fan is on • The unit has a valid Supply Air Temperature input • The unit has a valid Space Temperature input RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide All rights reserved...

  • Page 24: Economizer

    California Title 24. The FDD logic will detect an economizer that fails to close, fails to open, is stuck fully open, and fails to fully open. Each condition will cause an Economizer Operation alarm to occur and the specific fault condition will be displayed. RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016...

  • Page 25: Power Exhaust

    The outside air temperature is below the Economizer High OAT Lockout Temp setpoint • The outside air temperature is less than the space temperature • Enthalpy (if enabled) is Low RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide All rights reserved...

  • Page 26: Optimal Start

    To change Learning Adaptive Optimal Start settings: In the navigation tree, select the equipment that you want to change. Click Properties page > Equipment tab > Configuration > Setpoints. RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide...

  • Page 27: Enthalpy Control

    • The system is occupied • The supply fan has been started for at least 30 seconds • The CO2 sensor has a valid reading RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide All rights reserved...

  • Page 28: Heating

    Heating (page 24) and Cooling (page 19). The reversing valve output is not used in this application. W1 and W2 are used for auxiliary heat. Up to two stages are available. RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016...

  • Page 29: Dehumidification

    Sequence of Operation Dehumidification The RTU Open provides occupied and unoccupied dehumidification on units that are equipped with the Carrier Humidi-MiZer™ option from the factory. This requires a space relative humidity sensor or a humidistat for control. The following conditions must be true for the dehumidification control to operate: •...

  • Page 30: Remote Occupancy

    Compressor Safety may be configured on Binary Input 3. A compressor safety tripped indicator circuit is available on most Carrier rooftop equipment. A Compressor Safety Alarm is shown on Properties page > Equipment tab > Alarms and indicates that the equipment requires attention.

  • Page 31: Filter Status

    • If it's a Carrier Heat Pump HP Y1/W1 Ctrl, there is only 1 auxiliary heat stage output and the staging is done by the machine itself. The RTU Open control does not take any action.
  • Page 32 Economizer – This point indicates the specific fault detected and announced by the Economizer Operation alarm above. Detected fault conditions include Failed to Fully Open, Failed to Open, Failed to Close, and Stuck Open. RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016...

  • Page 33: Linkage

    Configuration > Compressor States value is not set to Two Stages. Airside Linkage Alarm - An RTU Open may act as an air source in a zoned system. Carrier systems use a function called Linkage™ to pass data between a master zone and its air source over an MS/TP network connection. When the RTU Open is part of a linked system, it will indicate an airside linkage alarm if it loses communications with its linkage master or if it receives data from more than 1 master zone.
  • Page 34 Based on the evaluation, the reference zone can change from one zone to another. The evaluation process continues until there is no demand from any zone or the system mode reselect timer causes a re- evaluation of the system conditions. RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016...

  • Page 35: Air Source Mode Determination

    VENT – Air source fan is on, economizer providing ventilation without heating or cooling, providing neutral supply air temperature. See the air source’s Installation manual for specific operation. RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide...

  • Page 36: Troubleshooting

    And Error LED shows... Status is.. 2 flashes per second Normal 2 flashes per second 2 flashes, Five minute auto-restart delay after system error alternating with RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide All rights reserved...
  • Page 37 14 flashes per second 14 flashes per second, alternating with Brownout Failure. Try the following solutions: • Turn the RTU Open off, then • Replace the RTU Open. RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide All rights reserved...

  • Page 38: Compliance

    ASHRAE standards. Compliance of listed products to requirements of ASHRAE Standard 135 is the responsibility of BACnet International. BTL ® is a registered trademark of BACnet International. RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide...

  • Page 39: Appendix A: Network Points List For Rtu Open

    2=Fan Only 3=Economizer Cooling 4=Cooling 5=Heating 6=Dehumidificati Input Register System Mode run_status MSV:2002 (Signed) 7=Test 8=Shutdown 9=Unocc Free Cooling 10=Fire Shutdown 11=IAQ Override 12=Pre-occ Purge RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide All rights reserved...
  • Page 40 Indoor Air Quality 0=Normal iaq_sensor_fail BV:7039 Discrete Input Sensor 1=Alarm Heating Lockout Holding Register °F oat_ht_lockout AV:9003 Temperature (Float) Dehumidification 0=Inactive dehum BV:2006 Discrete Input RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide All rights reserved...
  • Page 41 System OAT °F mstr_oa_temp AV:80001 Master T5x Override ovr_dur AV:9023 Duration VFD Speed Test vfd_spd_test AV:81002 0=Off input_3 di_3 BI:1003 1=On 0=Off input_4 di_4 BI:1004 1=On RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide All rights reserved...
  • Page 42 7 Control 1=On Factory Test Relay 0=Off Inactive (0) relay8_fac_test BV:91008 8 Control 1=On 0=Clean Filter Status filter_status BV:1004 1=Dirty firedown_status BV:1005 Fire Shutdown 0=Run Enabled RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide All rights reserved...
  • Page 43 Runtime 1=Alarm Switch 0=Normal di_cfg_alarm BV:7025 Configuration 1=Alarm System is shut 0=No shutdown_status BV:2011 down 1=Yes 0=Disable Unocc Free Cool Inactive (0) ntfc_ena BV:80001 1=Enable RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide All rights reserved...
  • Page 44 Input 8 Function di8_function MSV:81008 4=Filter Status 5=Remote Occupancy 6=Door Contact Input 8 Switch 1=NO di8_type MSV:81018 Configuration 2=NC 1=No Function Input 9 Function di9_function MSV:81009 2=HumidiStat RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide All rights reserved...
  • Page 45 Runtime Linkage Max link_max_dmpr AV:2611 Damper Position Air Source Supply °F link_sat AV:2608 Air Temp Max VFD Output max_vfd_spd AV:3026 Dehum Min VFD dehum_min_vfd AV:3028 RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide All rights reserved...
  • Page 46 1=Alarm Outdoor Air AV:1012 Input Register (Float) Quality CO2 (ppm) 0=Normal Gas Valve igc_alarm BV:7050 Discrete Input 1=Alarm Holding Register Setpoint °F occ_cl_stpt AV:3001 (Float) RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide All rights reserved...

  • Page 47: Network Points List For N2 And Lonworks

    Occupancy Status SNVT_switch(95) nvoOccStatus 1=Occupied 1=None 2=Temp Optimal Start Type SNVT_count_inc(9) nviOptStType Compensated 3=Learning Adaptive Setpoint °F SNVT_temp_p(105) nviUnoccHtSP Space Relative Humidity R 0=Normal SNVT_switch(95) nvoSpRHSenr RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide All rights reserved...
  • Page 48 Remaining 0=Disable Active Setpoint Adjustment SNVT_switch(95) nviSPAdjEnbl 1=Enable System Space °F -999 SNVT_temp_p(105) nviSysSpTmp Temperature System Outdoor AQ -999 Outdoor Air Temp 0=Normal Sensor 1=Alarm RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide All rights reserved...
  • Page 49 1=Alarm 0=Normal Space Temp Sensor SNVT_switch(95) nvoSPTmpSen 1=Alarm Outdoor Air Quality CO2 SNVT_ppm(29) nvoOAQ (ppm) 0=Normal Gas Valve SNVT_switch(95) nvoGasVlvAlm 1=Alarm Setpoint °F SNVT_temp_p(105) nviOccCoolSP RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide All rights reserved...

  • Page 50: Appendix B: Bacnet Protocol Implementation Conformance Statement

    Appendix B: BACnet Protocol Implementation Conformance Statement Appendix B: BACnet Protocol Implementation Conformance Statement The PIC statements are updated regularly. Please refer to the BACnet website http://www.bacnetinternational.net/catalog/index.php?m=28 for the latest information. RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide...

  • Page 51: Appendix C: Modbus Protocol Implementation Conformance Statement

    Register Type: 3 – Read Holding Register Single-Precision IEEE floating point Float Value (FLOAT) 6 – Preset Single Register value 16 – Preset Multiple Register RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide All rights reserved...
  • Page 52 2 – Read Input Status 1 – Read Coil Status Discrete Output (DO) 0 = Off, 1 = On 5 – Force Single Coil 15 – Force Multiple Coils RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide All rights reserved...

  • Page 53: Appendix D: Johnson N2 Protocol Implementation Conformance Statement

    Read Analog Input Read Binary Input Read Analog Output Read Binary Output Read Internal Parameter Write Analog Input Write Binary Input Write Analog Output Write Binary Output RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide All rights reserved...
  • Page 54 Appendix D: Johnson N2 Protocol Implementation Conformance Statement Write Internal Parameter Override Analog Input Override Binary Input Override Internal Parameter Override Release Request RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide All rights reserved...

  • Page 55: Appendix E: Lonworks Protocol Implementation Conformance Statement

    RTU Open prior to installation. Contact your Carrier representative for this .XIF file. LonWorks is an open protocol that requires the use Echelon's Neuron microprocessor to encode and decode the LonWorks packets.

  • Page 56: Document Revision History

    C-TS-RD-E-JH 1/8/16 Configuring for BACnet MS/TP Added note that controller counts as a full load on the MS/TP bus. C-TS-RD-E * For internal use only RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide All rights reserved...

  • Page 57: Index

    Power Exhaust • 21 Pre Occupancy Purge • 21 Remote occupancy • 26 Supply fan • 19 Unoccupied Free Cooling • 21 Start-up • 17 RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016 Integration Guide All rights reserved...
  • Page 60 CARRIER CORPORATION ©2016 A member of the United Technologies Corporation family · Stock symbol UTX · Catalog No. 11-808-521-01 · 2/22/2016...

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