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Condair Modbus RTU Operation Manual

Using modbus with condair humidifiers. includes installation, operation maintenance and troubleshooting information.
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Important: Read and save these instructions. This guide to be left with equipment owner.
Modbus
Installation and
Operation Manual
Using Modbus with Condair
Humidifiers. Includes installation,
operation maintenance and
troubleshooting information.
2560599-F | 15 June 2018

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Summary of Contents for Condair Modbus RTU

  • Page 1 Important: Read and save these instructions. This guide to be left with equipment owner. Modbus Installation and Operation Manual Using Modbus with Condair Humidifiers. Includes installation, operation maintenance and troubleshooting information. 2560599-F | 15 June 2018...
  • Page 2 CYLINDER # Proprietary Notice This document and the information disclosed herein are proprietary data of Condair Group AG. Neither this document nor the information contained herein shall be reproduced, used, or disclosed to others without the written authorization of Condair Group AG., except to the extent required for installation or maintenance of recipient’s equipment.

  • Page 3: Table Of Contents

    Contents Introduction Requirements Wiring Connections EL/NH-EL Models NHTC, GSTC, SETC, and MHTC Models MES2 and RH2 Models NHRS Models Addressing and Communications EL Electrode Steam Humidifiers NH-EL Electrode Steam Humidifiers NHTC Electrode Steam Humidifiers GSTC Gas Fired Steam Humidifiers SETC Steam Exchange Humidifiers MHTC Evaporative Media Humidifiers MES2 and RH2 Models NHRS Electric Steam Humidifiers...
  • Page 4  Condair Group AG does not accept any liability for installations of humidity equipment installed by unqualified personnel or the use of parts/components/equipment that are not authorized or approved by Condair Group AG.

  • Page 5: Introduction

    Introduction Many Condair humidifiers feature control boards that include Modbus RTU and can connect to Modbus networks right out of the box. This document describes how to connect these humidifiers to such a network and defines the parameters that may be monitored.
  • Page 6 NHTC-200 and an NHTC-30 as part of the same chain. Connecting additional non-Condair equipment into a Modbus chain is possible; however it is important to ensure that all devices are operating with identical baud rate, parity, and stop bits, and that each device has a unique Modbus address.

  • Page 7: El/Nh-El Models

    EL/NH-EL Models The EL/NH-EL models use a 3-pole connector on the main processor card for Modbus connection. This 3-pole connector is provided with all EL/NH-EL and connections can be made directly to this plug. Refer to Figure 2 and Figure 3 for connection location and wiring. Please note: there is a 120 Ohm termination resistor available on board.

  • Page 8: Nhtc, Gstc, Setc, And Mhtc Models

    The NHRS models require a Modbus kit to translate information from the processor board into Modbus RTU information. This kit can be factory installed if specified at time of order or retrofit to existing units in the field. Refer to figure 6 for information on the wiring connections for these units.
  • Page 9 Figure 3: EL/NH-EL Modbus Wiring Diagram Modbus Installation | 6...
  • Page 10 Figure 4: TC Modbus Wiring Diagram 7 | Modbus Installation...
  • Page 11 Figure 5: MES2 and RH2 Modbus Wiring Diagram Modbus Installation | 8...
  • Page 12 Figure 6: NHRS Modbus Wiring Diagram 9 | Modbus Installation...

  • Page 13: Addressing And Communications

    Addressing and Communications Once the humidifier has been wired to the network, control variables must be mapped to allow for control of the humidifier. The specific variables and communications requirements for each humidifier are described in the following sections. EL Electrode Steam Humidifiers After wiring connections have been completed, the humidifier needs to be setup to operate and communicate either through the Modbus or BACnet interface.
  • Page 14 Control Signal Setting By default the humidifier is configured operate on a hardwired control signal supplied through the unit terminal strip. This can be changed to allow the humidifier to function entirely through its Modbus or BACnet interface. To adjust this setting: 1 Press the Menu icon on the lower left corner of the screen, to access the menu.
  • Page 15 The following points may be mapped for control: Table 2: EL Humidifier Modbus Parameters Parameter Modbus Description Type Format Range Unit Details Name Addr. Remotely disable Remote Holding 0 = Idle/Humidify steam production 40001 Integer 0 OR 1 WRITE/READ Disable Register 1 = Disable for the unit...
  • Page 16 Parameter Modbus Description Type Format Range Unit Details Name Addr. Use only with EL-150 and EL-200 models when sending RH Sets the humidity value to Digital Setpoint high limit setpoint Holding RH/Demand B2 with 40009 Integer 10-95 WRITE/READ Channel B2 value for Channel Register dual channel control...
  • Page 17 Parameter Modbus Description Type Format Range Unit Details Name Addr. Demand Mode: Summation of System Input Channel A1 and System Demand A 30006 Integer 0-100 READ Demand A Register Channel A2 RH Mode: PID calculation External safety Input 0 = Open Safety Loop A 30007 Integer...
  • Page 18 Parameter Modbus Description Type Format Range Unit Details Name Addr. 0-Humidifying 1-Standby 2-Idle Drained 3-Keep Warm 4-Filling 5-Draining Operating status Input 6-Remote Off Status A 31003 Integer 0-13 READ unit A Register 7-Safety Loop 8-Warning 9-Fault 10-Blower Pack 11-Stopped 12-Partial Drained 13-Self Test 0-Humidifying 1-Standby...

  • Page 19: Nh-El Electrode Steam Humidifiers

    NH-EL Electrode Steam Humidifiers After wiring connections have been completed, the humidifier needs to be setup to operate and communicate either through the Modbus or BACnet interface. Modbus Communication Set-up The default Modbus address for an NH-EL is 10. If multiple units were included on an order, the addresses of individual units may vary.
  • Page 20 Control Signal Setting By default the humidifier is configured operate on a hardwired control signal supplied through the unit terminal strip. This can be changed to allow the humidifier to function entirely through its Modbus or BACnet interface. To adjust this setting: 6 Press the Menu icon on the lower left corner of the screen, to access the menu.
  • Page 21 The following points may be mapped for control: Table 3: NH-EL Humidifier Modbus Parameters Parameter Modbus Description Type Format Range Unit Details Name Addr. Write RH or Requires Modbus or BACnet to Demand signal be enabled. Holding Dinput_A1 value to control 40005 Integer 0 - 100...
  • Page 22 Parameter Modbus Description Type Format Range Unit Details Name Addr. 0 = Analog Selects signal 1 = Modbus Signal_ Holding source to 40014 Integer 0 - 4 Write 2 = BACnet/IP Source Register control unit 3 = BACnet/MS 4 = LonWorks 1 = Demand Control_Mo Selects method...
  • Page 23 Parameter Modbus Description Type Format Range Unit Details Name Addr. 0 = Humidifying 1 = Idle 2 = Idle Drain Reads the 3 = Keepwarm Humidifier_ status of the Input 4 = Filling 30003 Integer 0 - 9 Read Status_A unit for cylinder Register 5 = Draining...

  • Page 24: Nhtc Electrode Steam Humidifiers

    NHTC Electrode Steam Humidifiers After wiring connections have been completed, the humidifier needs to be setup to operate and communicate through the Modbus interface. Modbus Address The default Modbus address for an NHTC is 1. If multiple units were included on an order, the addresses of individual units may vary.
  • Page 25 Control Signal Setting By default the humidifier operation is configured on a hardwired control signal supplied through the unit terminal strip. This can be changed to allow the humidifier to function entirely through its Modbus interface. To adjust this setting: 1 Press the Menu key to access the menu.
  • Page 26 Modbus Parameters The NHTC uses the following parameters for communication: Signaling Type EIA-485 Transmission Mode Baud Rate 9600 Data Bits Stop Bits Parity Even Address / Unit Number *Default, may vary for multi-unit orders. It is important to note that the signaling type, transmission mode, baud rate, data bits and stop bits cannot be modified.
  • Page 27 The following points may be mapped for control: Table 4: NHTC Humidifier Modbus Parameters Variable Description Addr. Type Format Range Unit Details Name Sets a manual Limits output to capacity Holding CapLimitCyl1 40026 Integer 50-100 Write percentage of total restriction for Register cylinder capacity cylinder 1.
  • Page 28 Variable Description Addr. Type Format Range Unit Details Name Use only with NHTC- 150 and NHTC-200 Writes the models when sending desired space RH value to RHDem2 Holding Set2Cyl2 setpoint for 41010 Integer 30-95 Write with dual channel Register control channel control enabled and 2 for cylinder 2 cylinders are in...
  • Page 29 Variable Description Addr. Type Format Range Unit Details Name Reads operating time for cylinder 2 (NHTC- 150 and NHTC-200 Reads operating Input only). Each number is Cyl2OpTime time for cylinder 31213 Integer Read Register 65535 equivalent to 5 minutes of operation. Time in hours = (Value x 5)/60 11 = Security loop...

  • Page 30: Gstc Gas Fired Steam Humidifiers

    GSTC Gas Fired Steam Humidifiers After wiring connections have been completed, the humidifier needs to be setup to operate and communicate through the Modbus interface. Modbus Address The default Modbus address for a GSTC is 1. If multiple units were included on an order, the addresses of individual units may vary.
  • Page 31 To adjust this setting: 1 Press the Menu key to access the menu. 2 When prompted for a password, enter 0335 using the arrow keys. Confirm the password with set. 3 Select the Control Settings menu and press the Set key. The following settings can be adjusted: Analog: Use hardwired control signal Source:...
  • Page 32 The following points may be mapped for control: Table 5: GSTC Humidifier Modbus Parameters Variable Description Addr Type Format Range Unit Additional Details Name Write RH or Requires network Demand signal Holding RHDem1 40264 Analog 0-100 Write controls value to control Register (NetSensor = 1) channel 1...
  • Page 33 Variable Description Addr Type Format Range Unit Additional Details Name Input 0 = No Fault Fault Read fault status 30301 Binary Read Register 1 = Fault Detected 0 = No Service Read service Input Service 30300 Binary Read Warning warning status Register 1 = Service Required Read...

  • Page 34: Setc Steam Exchange Humidifiers

    SETC Steam Exchange Humidifiers After wiring connections have been completed, the humidifier needs to be setup to operate and communicate through the Modbus interface. Modbus Address The default Modbus address for a SETC is 1. If multiple units were included on an order, the addresses of individual units may vary.
  • Page 35 Control Signal Setting By default the humidifier is configured operate on a hardwired control signal supplied through the unit terminal strip. This can be changed to allow the humidifier to function entirely through its Modbus interface. To adjust this setting: 1 Press the Menu key to access the menu.
  • Page 36 The following points may be mapped for control: Table 6: SETC Humidifier Modbus Parameters Variable Description Addr Type Format Range Unit Additional Details Name Requires network Write RH or Demand signal Holding RHDem1 40264 Analog 0-100 Write controls (NetSensor value to control channel 1 Register = 1) Requires network...
  • Page 37 Variable Description Addr Type Format Range Unit Additional Details Name 1 = Service Required 0 = Idle / Standby Input Status Read humidification status 30302 Binary Read 1 = Active / Register Humidifying 0 = Communication Connecti Input Error Read connection status 40267 Binary Read...

  • Page 38: Mhtc Evaporative Media Humidifiers

    MHTC Evaporative Media Humidifiers After wiring connections have been completed, the humidifier needs to be setup to operate and communicate through the Modbus interface. Modbus Address The default Modbus address for a MHTC is 1. If multiple units were included on an order, the addresses of individual units may vary.
  • Page 39 Control Signal Setting By default the humidifier is configured operate on a hardwired control signal supplied through the unit terminal strip. This can be changed to allow the humidifier to function entirely through its Modbus interface. To adjust this setting: 1 Press the Menu key to access the menu.
  • Page 40 Modbus Parameters The MHTC uses the following parameters for communication: Signaling Type EIA-485 Transmission Mode Baud Rate 9600 (cannot be changed) Data Bits Stop Bits Parity None Address / Unit Number *Default, may vary for multi-unit orders. It is important to note that the signaling type, transmission mode, baud rate, data bits and stop bits cannot be modified.
  • Page 41 Variable Description Addr Type Format Range Unit Details Name Indicates output from Input 0 = Inactive Stage2Dem 30026 Integer 0 or 1 Read humidifier Register 1 = Active stage 2 Indicates output from Input 0 = Inactive Stage3Dem 30027 Integer 0 or 1 Read humidifier...

  • Page 42: Mes2 And Rh2 Models

    MES2 and RH2 Models The default Modbus address for a humidifier is 1. To view or change the unit number: 1 Establish Modbus communications and map desired points as indicated in the following table. 2 Read the current Modbus address from variable 40201. 3 Change this address by writing the desired value to 40201.
  • Page 43 The following points may be mapped for control: Modbus Installation | 40...
  • Page 44 Table 8: MES2 and RH2 Humidifier Modbus Parameters 41 | Modbus Installation...
  • Page 45 Variable Description Addr Type Format Range Unit Details Name 0 = Disable operation of humidifier (Default Value) 255 = Allow operation of humidifier within limits specified by CapLimit Notes: - If a valid Modbus message is Configures not received within the timeout windows, this parameter reverts to 0.
  • Page 46 Requires that HumEnable is Allows the set to 0 (disabled) first or run hour ILLEGAL DATA error will counter to be occur. Holding RunHrReset reset to 0, 40006 Integer 0, 255 Write 255 = Reset the run time Register typically used hours (reported in RunHrs) following to 0.
  • Page 47 Each bit represents 0.0024 Amps, therefore 1 Amp = 416 bits. Displays Input The Amp value does not Current current draw 30104 Integer Amps Read Register 12495 clear when security loop is in Amps. open and the demand is 0. The last detected value remains in the register.
  • Page 48 Uses significant bits 0 through 15 (1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768 respectively). Describes Bit 1 - Electrodes passing controller Input current (0 = On) CtrlStatus1 hardware 30109 Integer Read Register 32768 Bit 2 - FAULT Relay (0 = On)

  • Page 49: Nhrs Electric Steam Humidifiers

    NHRS Electric Steam Humidifiers After wiring connections have been completed, the humidifier needs to be setup to operate and communicate through the Modbus interface. Modbus Address The default Modbus address for a NHRS is 1. If multiple units were included on an order, the addresses of individual units may vary.
  • Page 50 Modbus Parameters The NHRS uses the following parameters for communication: Signaling Type EIA-485 Transmission Mode Baud Rate 9600 Data Bits Stop Bits Parity None Address / Unit Number *Default, may vary for multi-unit orders. 47 | Modbus Installation...
  • Page 51 The following points may be mapped for control: Table 9: NHRS Humidifier Modbus Parameters Variable Description Addr Type Format Range Unit Details Name Set a manual Limits output to Holding CapLimit capacity restriction 40006 Integer 50-100 Write percentage of total Register for the humidifier capacity...

  • Page 52: Troubleshooting

    Troubleshooting Table 10: General Troubleshooting 49 | Modbus Installation...
  • Page 53 Since the humidifier knows both the set point and humidity level, these values may be monitored over the Modbus connection. Check communication parameters. Condair humidifiers are capable of Modbus RTU communication. Modbus TCP based systems require Cannot establish a gateway to translate the information. communication.
  • Page 54 Check Modbus addresses for conflicts. Each Modbus device on the Invalid data network must have a unique address. Devices (humidifiers or otherwise) cannot share Modbus addresses. More variables or Contact Condair Technical Services for additional support. additional information is required from the humidifier.

  • Page 55: Modbus - Field Retrofit For Nhrs Models

    Appendix A Modbus – Field Retrofit for NHRS Models Step A – Unpacking The Field kit is used to provide a simple hardware interface between the humidifier and Modbus BMS RS485 connection. Because the NHRS Humidifier speaks a different language, a Translation card is provided with the hardware kit.
  • Page 56 Figure 8: Routing of Ribbon Cable 4 Connect the ribbon cable 20 pin side to the Logic Card. 20 pin connection Figure 9: Pin connection for Ribbon cable 5 Configured dipswitch settings according to MODE1 printed on card (485<>TTL). 53 | Modbus Installation...
  • Page 57 Figure 10: Dipswitch settings for Logic Card Connect the RJ-11 cable to the corresponding jack on the logic card. Figure 11: RJ-11 Jack Location on Logic Card 7 Mount logic card with nylon standoffs and screws to humidifier using the 4 pre-drilled holes Modbus Installation | 54...
  • Page 58 Figure 12: Pre drilled holes for Logic card 1 Mount the Terminal strip (3 pole) below or above the existing NHRS low voltage terminal strip 55 | Modbus Installation...
  • Page 59 Figure 13: Low voltage terminal strip on NHRS Humidifier Modbus Installation | 56...
  • Page 60 Warranty Condair Humidity Inc. and/or Condair Humidity Ltd. (hereinafter collectively referred to as THE COMPANY), warrant for a period of two years after installation or 30 months from manufacturer’s ship date, whichever date is earlier, that THE COMPANY’s manufactured and assembled products, not otherwise expressly warranted (with the exception of the cylinder), are free from defects in material and workmanship.
  • Page 61 U.S.A. 826 Proctor Avenue Ogdensburg, NY 13669 CANADA 2740 Fenton Road Ottawa, Ontario K1T 3T7 TEL: 1.866.667.8321 FAX: 613.822.7964 EMAIL: nortec@humidity.com WEBSITE: www.humidity.com...

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