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Carrier RTU Open v5 Integration Manual

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CARRIER CORPORATION ©2019
A member of the United Technologies Corporation family · Stock symbol UTX · Catalog No. 11-808-697-01 · 11/19/2019
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Summary of Contents for Carrier RTU Open v5

  • Page 1 CARRIER CORPORATION ©2019 A member of the United Technologies Corporation family · Stock symbol UTX · Catalog No. 11-808-697-01 · 11/19/2019...
  • 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 ©2019. All rights reserved throughout the world. i-Vu is a registered trademark of Carrier...

  • Page 3: Table Of Contents

    Contents Introduction .................................. 1 What is the RTU Open controller? ........................1 Safety considerations & handling warning ....................... 3 Communications wiring .............................. 4 Protocol overview ..............................4 BACnet MS/TP ..............................5 To set up the RTU Open for BACnet MS/TP ..................5 Adjusting BACnet MS/TP properties using an Equipment Touch ............
  • Page 4 Contents FCC Compliance ..............................40 BACnet Compliance............................40 CE Compliance ..............................40 Appendix A: Network Points List for RTU Open ...................... 41 Third party access to BACnet points in a controller ..................41 Network points list for BACnet and Modbus ....................44 Network points list for N2 and LonWorks ......................

  • 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 v5 CARRIER CORPORATION ©2019 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 v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...

  • Page 8: Communications Wiring

    Select Baud (Default) BACnet ARC156 Modbus Slave Select Baud Select Baud Slave Lonworks Baud DIP switch settings Baud Rate DIP switch 2 DIP switch 1 9,600 bps 19.2 kbps RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...

  • Page 9: 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 10: Adjusting Bacnet Ms/Tp Properties Using An Equipment Touch

    Set the remaining DIP switches as follows: BACnet MS/TP DIP switch settings The following example shows the DIP switches set for 76.8k (Carrier default), and BACnet MS/TP. Connect the BACnet MS/TP network to the controller's J19 Network Comm port. Connect to Net+, Net-, and SHLD.
  • Page 11 In the Equipment Touch interface, navigate to the Properties Menu screen and click Login. NOTE The following graphic is generic and not specific to your system. Type Touch for the password and click Done. RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide...

  • Page 12: Troubleshooting Bacnet Ms/Tp Communication

    Done. Click Save. Troubleshooting BACnet MS/TP communication For detailed troubleshooting and a list of supported objects, get the controller's BACnet PICS from the Carrier BACnet PICS website http://www.bacnetinternational.net/catalog/index.php?m=28. You must get your BACnet Object list from the manufacturer. The most common communication problems are the result of not properly following the configuration steps outlined in this manual.

  • Page 13: Bacnet Arc156

    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 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 14: Troubleshooting Arc156 Communication

    NOTES  The controller recognizes physical changes (DIP switches, rotary switches, and jumpers) upon power up.  If RX LED is solid, then the terminations are incorrect. RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...

  • Page 15: Modbus

    RTU Open is fixed at 8 data bits, No Parity, and 1 Stop bit for this protocol's communications. Baud DIP switch settings Baud rate 9,600 bps 19.2 kbps 38.4 kbps 76.8 kbps RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...

  • Page 16: Troubleshooting Modbus Communication

    Hardware settings for speaking Modbus (8 Data bits, No Parity, and 1 Stop bit):  Baud rate DIP switches DS2 and DS1  Protocol DIP switches DS3 - DS6 RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...
  • Page 17 The register address used in the query is not supported Address by the controller. 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 v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...

  • Page 18: Johnson N2

    RTU Open is fixed at 9600 bps baud, 8 data bits, No Parity, and 1 Stop bit. Set the remaining DIP switches as follows: N2 DIP switch settings The following example shows the DIP switches set for 9600 baud and N2. RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...

  • Page 19: Troubleshooting N2 Communication

    If a controller begins or ends a network segment, a terminating resistor may be needed.  The controller recognizes physical changes (DIP switches, rotary switches, and jumpers) upon power up. RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...

  • Page 20: Lonworks

     Isolate from high voltage or electrostatic discharge.  Ensure that you are properly grounded. Refer to Appendix E (page 60) for the LonWorks Protocol Implementation Conformance Statement (PICS). RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...

  • Page 21: To Set Up The Rtu Open For The Lonworks Option Card (Part #Lon-Oc)

    NOTE The 2-pin Net port provides TP/FT-10 channel compatibility. The TP/FT-10 or "Free Topology" network type is polarity insensitive. Use 24 to 16 AWG twisted pair wire. Turn on the RTU Open's power. Commission the controller for LonWorks communication. See instructions below. RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...

  • Page 22: Commissioning The Controller For Lonworks Communication

    Software settings defined through the Equipment Touch device. To confirm settings, obtain a Modstat of the device. On the Equipment Touch, click the link to the Modstat. RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...

  • Page 23: Start-Up

    AC power ground could damage the USB Link and the controller. 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 v5 CARRIER CORPORATION ©2019 Integration Guide...

  • Page 24: 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 25: Supply Fan

    Dmpr Pos / DCV Min Pos is used when the fan is at the configured maximum fan speed. The Low Fan Econ Min Pos is used when the fan is at the lowest speed and depends on which value, minimum vfd speed or heating speed, is set lower. RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide...

  • Page 26: Cooling

    Max Speed Voltage / Max VFD Output) to provide sufficient airflow across the coil and maintain the desired SAT setpoint. The number of setpoints displayed and used depends on the unit type and configuration.The specific setpoint used is based on how many stages of cooling are actively operating. RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide...

  • Page 27: Economizer

    RTU Open must be in Economizer mode  30 minutes must elapse since the last time heating or cooling was active  OAT must be < (OAT economizer lockout - 15°F) RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...

  • Page 28: Power Exhaust

    The following conditions must be true for pre-occupancy purge to operate:  Pre-Occupancy Purge set to Enable  Economizer Exists set to Yes RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...

  • Page 29: Unoccupied Free Cooling

    The system is unoccupied NOTE If the controller does not have a valid outside air temperature, then a constant of 65°F (18.3°C) is used. This value is not adjustable. RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...
  • Page 30 On the Properties page > Control Program tab > Configuration > Setpoints, click Heat Start K factor or Cool Start K factor. This defines the equipment’s recovery rate in minutes / deg. RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide...

  • Page 31: Enthalpy Control

    The degree to which the outside air damper may be opened by the Indoor Air CO2 algorithm is limited by the DCV Max Vent Damper Pos setpoint, which is adjustable between zero and seventy-five percent (0 – 75%). RTU Open v5 CARRIER CORPORATION ©2019...

  • Page 32: Heating

    The following conditions must be true for the algorithm to operate:  The unit cannot be a heat pump type (HP O/B Ctrl or HP Y1/W1 Ctrl)  The unit has been operating for at least 5 minutes RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...

  • Page 33: Heat Pump Operation

    IMPORTANT! All heat pump unit types (HP O/B and Y1/W1) require a valid OA Temperature value. This value may be a local sensor connected to the RTU Open or a value received from the network. RTU Open v5 CARRIER CORPORATION ©2019...

  • Page 34: 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 35: 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 > Control Program tab > Alarms and indicates that the equipment requires attention.

  • Page 36: 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 37 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 v5 CARRIER CORPORATION ©2019...

  • Page 38: 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 39 SAV requires the unit’s fan be controlled by a VFD to provide variable speed fan operation. SAV operation is standard on the Carrier 3-stage LC Weather Expert units but can also be used with other 2-stage heat/cool units. To obtain SAV operation on those units, the Fan Control must be set to Variable Speed. In this mode, the fan runs at the lowest speed possible, saving energy and preventing excessive air from being bypassed during heating or cooling operation.

  • Page 40: Linkage Air Source Mode Determination

    Air source fan is on and providing heat. Equipment SAT is above the reference zone temperature and all zones modulate airflow to maintain the zone temperature at the appropriate (occ/unocc) heating setpoint. RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide...
  • Page 41 All zone dampers close and local terminal fans are disabled. VENT Air source fan is on and providing ventilation without heating or cooling. See the air source’s installation manual for more specific operation. RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...

  • Page 42: Troubleshooting

    2 flashes per second 3 flashes, then off Controller has just been formatted 2 flashes per second Two or more devices on this network have the same network address RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...
  • Page 43 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 v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...

  • Page 44: Compliance

    CE Compliance WARNING This is a Class A product. In a domestic environment, this product may cause radio interference in which case the user may be required to take adequate measures. RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...

  • Page 45: Appendix A: Network Points List For Rtu Open

    Open controllers. This information applies whether the system point is being accessed by another i-Vu® Open controller or by a third party system. RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide...
  • Page 46 CAUTION If any other Priority Level is used, the value will not be recognized by the controller. * Modbus, N2, and LonWorks default values only apply to multi-protocol controllers. † Points do not apply to multi-protocol controllers. RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide...
  • Page 47 Fire/Smoke bv:7007 fire_alarm Fire/Smoke Shutdown †System bv:1906 press_override Pressurization bv:7038 press_alarm Pressurization BAS On/Off msv:1001 keypad_ovrde Occupancy Status bv:2008 occ_status [Occupancy] † Points do not apply to multi-protocol controllers. RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...

  • Page 48: Network Points List For Bacnet And Modbus

    Holding Register %Open econ_purge_min AV:9029 (Float) Active Compressor comp_run AV:2020 Input Register Stages (Float) System Mode 1=Off run_status MSV:2002 Input Register 2=Fan Only (Signed) 3=Economizer Cooling 4=Cooling 5=Heating 6=Dehumidificati RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...
  • Page 49 BAS On / Off 1=Inactive keypad_ovrde MSV:1001 Holding Register 2=Occupied (Signed) 3=Unoccupied System Space AQ -999 system_iaq AV:1903 Holding Register (Float) Holding Register System Space RH -999 system_rh AV:1904 (Float) RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...
  • Page 50 Active (1) BV:1901 Coil 1=Low Optimal Start optm_start AV:9026 Holding Register (Float) System Cooling Demand cool_demand_level AV:9006 Level System Heating Demand heat_demand_level AV:9036 Level System OAT Master °F mstr_oa_temp AV:80001 RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...
  • Page 51 1=On Factory Test Relay 4 0=Off Inactive relay4_fac_test BV:91004 Control 1=On Factory Test Relay 5 0=Off Inactive relay5_fac_test BV:91005 Control 1=On Factory Test Relay 6 0=Off Inactive relay6_fac_test BV:91006 RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...
  • Page 52 BV:81000 1=Enable Setpoint Slider 0=Normal slidepot_alarm BV:7002 1=Alarm Shutdown 0=Inactive Inactive shutdown BV:9001 1=Active 0=Normal Supply Fan Failure sfan_fail_alarm BV:7008 1=Alarm Supply Fan in Hand 0=Normal sfan_hand_alarm BV:7009 RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...
  • Page 53 1=No Function di5_function MSV:81005 2=Fire Shutdown 3=Fan Status 4=Filter Status 5=Remote Occupancy 6=Door Contact Input 5 Switch 1=NO di5_type MSV:81015 Configuration 2=NC Input 8 Function 1=No Function di8_function MSV:81008 RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...
  • Page 54 SPT Sensor AV:1 time_remaining input_10 °F ai_10 AI:1010 Factory Test Analog 1 ao1_fac_test AV:91001 Control Economizer High OAT °F oat_ec_lockout AV:9008 Lockout Temp Maximum Heating SAT °F sat_ht_max AV:83004 RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...
  • Page 55 BV:7001 Discrete Input 1=Alarm Outdoor Air Quality CO2 AV:1012 Input Register (ppm) (Float) Gas Valve 0=Normal igc_alarm BV:7050 Discrete Input 1=Alarm Holding Register Setpoint °F occ_cl_stpt AV:3001 (Float) RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...

  • Page 56: Network Points List For N2 And Lonworks

    Setpoint Occupancy Status 0=Unoccupied SNVT_switch(95) nvoOccStatus 1=Occupied Optimal Start Type 1=None SNVT_count_inc(9) nviOptStType 2=Temp Compensated 3=Learning Adaptive Setpoint °F SNVT_temp_p(105) nviUnoccHtSP Space Relative Humidity R 0=Normal SNVT_switch(95) nvoSpRHSenr RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...
  • Page 57 Override Time SNVT_count_inc(9) nvoOvrTmRem Remaining Setpoint Adjustment 0=Disable Active 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 v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...
  • Page 58 Space Relative Humidity R 0=Normal SNVT_switch(95) nvoHiSPRHAlm 1=Alarm Space Temp Sensor 0=Normal SNVT_switch(95) nvoSPTmpSen 1=Alarm Outdoor Air Quality CO2 SNVT_ppm(29) nvoOAQ (ppm) Gas Valve 0=Normal SNVT_switch(95) nvoGasVlvAlm 1=Alarm Setpoint °F SNVT_temp_p(105) nviOccCoolSP RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...

  • Page 59: 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 v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...

  • Page 60: Appendix C: Modbus Protocol Implementation Conformance Statement

    Function Codes Used with this Register Type: Range: 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 v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...
  • Page 61 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 v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...

  • Page 62: Appendix D: Johnson N2 Protocol Implementation Conformance Statement

    Poll Without Acknowledge Poll With Acknowledge Read Analog Input Read Binary Input Read Analog Output Read Binary Output Read Internal Parameter Write Analog Input Write Binary Input Write Analog Output RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...
  • Page 63 Appendix D: Johnson N2 Protocol Implementation Conformance Statement Write Binary Output Write Internal Parameter Override Analog Input Override Binary Input Override Internal Parameter Override Release Request RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...

  • Page 64: 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 65: Document Revision History

    Corrected DCV Max Vent Damper Pos percent C-TS-RC-O 2/5/19 What is the RTU Open controller? J1 Input 5 (SMK) wire color corrected from gray to blue C-TS-RD-E-JA * For internal use only RTU Open v5 CARRIER CORPORATION ©2019 Integration Guide All rights reserved...
  • Page 66 CARRIER CORPORATION ©2019 A member of the United Technologies Corporation family · Stock symbol UTX · Catalog No. 11-808-697-01 · 11/19/2019...

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