How it Works
Condair
Loading...
Modbus RTU
Operation Manual
61 pgs2.42 Mb0

Condair Modbus RTU Operation Manual

Download
Page 1
Important: Read and save these instructions. This guide to be left with equipment owner.
2560599-F | 15 June 2018
Modbus
Installation and Operation Manual
Using Modbus with Condair Humidifiers. Includes installation, operation maintenance and troubleshooting information.
Page 2
INSTALLATION DATE (MM/DD/YYYY)
MODEL #
SERIAL #
CYLINDER #
Thank you for choosing Condair.
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.
Liability Notice
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.
Copyright Notice
Copyright 2018, Condair Group AG. All rights reserved.
Page 3
Contents
Introduction 2
Requirements 2
Wiring Connections 2
EL/NH-EL Models 4
NHTC, GSTC, SETC, and MHTC Models 5
MES2 and RH2 Models 5
NHRS Models 5
Addressing and Communications 10
EL Electrode Steam Humidifiers 10
NH-EL Electrode Steam Humidifiers 16
NHTC Electrode Steam Humidifiers 21
GSTC Gas Fired Steam Humidifiers 27
SETC Steam Exchange Humidifiers 31
MHTC Evaporative Media Humidifiers 35
MES2 and RH2 Models 39
NHRS Electric Steam Humidifiers 46
Troubleshooting 49
Appendix A 52
Modbus – Field Retrofit for NHRS Models 52
Page 4
CAUTION: Servicing
Group AG.
CAUTION: Electrical
CAUTION: Installation
Disconnect main power before any servicing.
The plumbing and electrical compartments contain high voltage components and
wiring. Access should be limited to authorized personnel only.
During and following operation of the humidifier, the steam and components in
contact with the steam such as the blower pack, steam lines, steam distributors, and condensate lines can become hot and can burn if touched.
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
All electrical work should be done according to local and national electrical code.
Electrical connection to be performed by a licensed electrician.
Do not mount on hot surfaces.
Do not mount in area where freezing can occur.
Do not mount on vibrating surface.
Do not mount on floor.
Regardless of selecting on/off or modulating control method, Condair humidifiers
must have a closed circuit across its on/off security loop control terminal to operate. Condair highly recommends the use of a duct high limit humidistat.
1 | Modbus Installation
Page 5
Part
Number
Kit Name
Kit Description
2553787
NHTC, GSTC, SETC Modbus Connection
Optional adapter cable for NHTC, GSTC, SETC.
2560630
MHTC Modbus Interface
Optional terminal block for MHTC Modbus interface.
2531585
Modbus Option for OEM Digital Board
Required adapter board and terminals for Modbus connections.
2560631
NHRS Modbus converter
Required TTL converter for NHRS Modbus connections.
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. Please note that there are differences between Modbus RTU and Modbus TCP. Condair humidifiers are Modbus RTU capable and require a gateway (by others) for Modbus TCP networks. Contact the factory for more information on Modbus TCP communications.
Requirements
EL/NH-EL Humidifiers are capable of Modbus RTU and require no additional hardware for this connection.
Condair humidifiers that feature that Total Controller (“TC”) control boards are also capable of Modbus RTU. These include the NHTC, the GSTC, SETC, and MHTC humidifiers.
Additionally, the RH2 and MES-2 models feature a digital control board that supports Modbus, however these models require an adapter board to provide the Modbus interface. Finally, the NHRS also supports Modbus communications; however a TTL converter is required for this
functionality. Refer to following table for more information, items described as “optional” are
for convenience (but not required for Modbus), while items listed as required are needed for Modbus functionality:
Table 1: Modbus Accessories
Please consult your local Condair representative to orders connection kits.
Wiring Connections
Using the correct wiring between the humidifier and the Modbus network is important to ensure reliable communications and reduce the impact of electrical interference. The recommended wire type is 18 -24 AWG, shielded twisted pair wire with 120 Ohm characteristic impedance. As an alternative, CAT-5 (“Ethernet”) cable exceeds these specifications and may be used. In this case, only two of the conductors and the wire shield will be used; care must be taken to isolate any unused conductors.
Regardless of which wire type is used ensuring the correct shield terminations is necessary to prevent electrical interference. The wire shield should be terminated at either the humidifier or the Modbus system, but not both. This allows induced current to “drain”; if the shield is terminated at both ends it will function as a conductor and can actually increase electrical interference. To minimize signal loss a wire run should not exceed 2000 feet. Additionally, to ensure communication reliability, it is recommended that no more than 8 humidifiers are
Modbus Installation | 2
Page 6
connected to a single chain/bus. The humidifiers should be the same type but do not need to be the same capacity. For example it is not recommended to have an NHTC and a GSTC as part of the same chain, but it is acceptable to have an 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.
Figure 1: Example Daisy Chain Diagram for EL/NH-EL, NHTC, GS, SE
3 | Modbus Installation
Page 7
Figure 2: EL/NH-EL Modbus 3-Pole Plug Location
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. When the jumper J4 is on, 120 Ohm is enabled. When the jumper J4 is off, 120 Ohm is disabled.
Modbus Installation | 4
Page 8
NHTC, GSTC, SETC, and MHTC Models
The NHTC, GSTC, SETC, and MHTC models use a multifunction RJ45 plug on the mainboard to provide Modbus communications. Connections can be made directly to this plug or, alternatively, using one of accessories listed above.
Refer to figure 4 for information on the wiring connections for these units.
Note: This instruction manual covers the connections and points for the GSTC B+ and SETC B+ models only. Older models, manufactured pre-2009 do not include the RJ45 plug and require an additional interface cable. Contact Condair for information on connecting these units.
MES2 and RH2 Models
The MES2 and RH2 models require a Modbus support board to provide a connection point. This board can be factory installed if indicated at time of order, or retrofit to existing units in the field.
Refer to Figure 5 for information on the wiring connections for these units.
NHRS 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.
5 | Modbus Installation
Page 9
Figure 3: EL/NH-EL Modbus Wiring Diagram
Modbus Installation | 6
Page 10
7 | Modbus Installation
Figure 4: TC Modbus Wiring Diagram
Page 11
Figure 5: MES2 and RH2 Modbus Wiring Diagram
Modbus Installation | 8
Page 12
9 | Modbus Installation
Figure 6: NHRS Modbus Wiring Diagram
Page 13
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.
Modbus Communication Set-up
The default Modbus address for the EL is 10. If multiple units were included on an order, the addresses of individual units may vary. To view or change the Modbus address:
1 Press the Menu icon on the lower left corner of the screen, to access the menu. 2 When prompted for a password, enter 0335 using the number pad. Press the Check Mark
icon to confirm.
3 Select the Configuration menu. 4 Select the Comms. menu. 5 Using the navigation buttons on the top right of the screen, scroll down to the Modbus
Parameters.
Note: By default, Modbus is disabled. To enable Modbus, select Modbus under Modbus Parameters. Select ON and confirm the selection by pressing the Check Mark button.
6 Select the Modbus Address setting. Using the Up and Down arrows, select a value between
1 and 247 inclusive as desired and press the Check Mark button to confirm the selection. It is recommended to leave the parity and baud rate settings to their factory defaults (Even and 9600 respectively) unless communication problems occur.
7 Press Back repeatedly until you return to the home screen.
This procedure is summarized below:
Main Menu > 0335 > Configuration > Comms. Menu > Modbus Parameters >
Addr: 10 (1 – 247 acceptable) Parity: Even (None, Even, Odd) Baud Rate: 9600 (9600, 19200, 38400, 115200)
Modbus Installation | 10
Page 14
Source
Analog: Use hardwired control signal Modbus: Write control signal through Modbus interface
Control Mode
Demand: Use a demand control signal RH P: Use a sensor value and proportional RH PI: Use a sensor value and proportional-integral control band
Control Channels
Single: Use a signal channel control signal Dual: Use a dual channel control signal
Signaling Type
EIA-485
Transmission Mode
RTU
Baud Rate
9600
Data Bits
8
Stop Bits
1
Parity
Even
Address / Unit Number
10*
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. 2 When prompted for a password, enter 0335 using the number pad. Press the Check Mark
icon to confirm.
3 Select the Configuration menu. 4 Select the Control Settings menu. The following settings can be adjusted:
Note: Refer to the Operator Interface section of the EL Operation and Maintenance Manual for more information on the above settings.
5 Press Check Mark to confirm choice and then Back repeatedly to return to the home screen
when complete.
This procedure is summarized below:
Main Menu > 0335 > Configuration > Control Settings >
Source: Analog, Modbus, Control Mode: Demand, RH P, or RH PI Control Channels: Single or Dual
Modbus Parameters
The EL uses the following parameters for Modbus communication:
*Default, may vary for multi-unit orders.
It is important to note that the signaling type, transmission mode, data bits and stop bits cannot be modified. Parity, baud rate and unit address can be modified as required.
11 | Modbus Installation
Page 15
Parameter
Name
Description
Modbus
Addr.
Type
Format
Range
Unit
W/R
Details
Remote Disable
Remotely disable steam production for the unit
40001
Holding
Register
Integer
0 OR 1
-
WRITE/READ
0 = Idle/Humidify 1 = Disable
Manual Capacity A
Sets a manual capacity limit restriction for cylinder A
40002
Holding
Register
Integer
20-100
%
WRITE/READ
Limits output to percentage of total cylinder capacity for cylinder A (EL-150 and EL-200 models only)
Setpoint Channel A1
Sets the desired humidity setpoint value for Channel A1
40003
Holding
Register
Integer
0-95
%
WRITE/READ
Use only when sending RH values to Digital RH/Demand A1. For most common configurations this is the primary space setpoint
Setpoint Channel A2
Sets the humidity high limit setpoint value for Channel A2
40004
Holding
Register
Integer
10-95
%
WRITE/READ
Use only when sending RH value to Digital RH/Demand A2 with dual channel control enabled
Digital RH/Demand A1
Actual humidity or demand via BACnet unit A
40005
Holding
Register
Integer
0-100
%
WRITE/READ
Requires Modbus or BACnet to be enabled. For most common configurations, this is the primary control signal
Digital RH/Demand A2
Actual humidity or limiter via BACnet unit A
40006
Holding
Register
Integer
0-100
%
WRITE/READ
Requires Modbus or BACnet to be enabled. Only applies to EL-150 and EL-200 with cylinders in independent operation mode
Manual Capacity B
Sets a manual capacity limit restriction for cylinder B
40007
Holding
Register
Integer
20-100
%
WRITE/READ
Limits output to percentage of total cylinder capacity for cylinder B (EL-150 and EL-200 models only)
Setpoint Channel B1
Sets the desired humidity setpoint value for Channel B1
40008
Holding
Register
Integer
0-95%
%
WRITE/READ
Use only with EL-150 and EL-200 models when sending RH value to Digital RH/Demand B1 and cylinders are in independent operation mode
The following points may be mapped for control:
Table 2: EL Humidifier Modbus Parameters
Modbus Installation | 12
Page 16
Parameter
Name
Description
Modbus
Addr.
Type
Format
Range
Unit
W/R
Details
Setpoint Channel B2
Sets the humidity high limit setpoint value for Channel B2
40009
Holding
Register
Integer
10-95
%
WRITE/READ
Use only with EL-150 and EL-200 models when sending RH value to Digital RH/Demand B2 with dual channel control enabled and cylinders are in independent operation mode
Digital RH/Demand B1
Actual humidity or demand via BACnet unit B
40010
Holding
Register
Integer
0-100
%
WRITE/READ
Requires Modbus or BACnet to be enabled. Only applies to EL­150 and EL-200 with dual channel control enabled
Digital RH/Demand B2
Actual humidity or limiter via BACnet unit B
40011
Holding
Register
Integer
0-100
%
WRITE/READ
Requires Modbus or BACnet to be enabled. Only applies to EL­150 and EL-200 with cylinders dual channel control enabled and cylinders in independent operation mode
BAND CHANNEL A1
P-band unit A (proportional band)
40017
Holding
Register
Integer
6-65
%
WRITE/READ
BAND CHANNEL A2
P-band unit A (proportional band) limiter
40018
Holding
Register
Integer
6-65
%
WRITE/READ
BAND CHANNEL B1
P-band unit B (proportional band)
40019
Holding
Register
Integer
6-65
%
WRITE/READ
BAND CHANNEL B2
P-band unit B (proportional band) limiter
40020
Holding
Register
Integer
6-65
%
WRITE/READ
ITime Channel A1
Integral time channel 1 unit A
40021
Holding
Register
Integer
1-60
min
WRITE/READ
Damp Channel A2
Damp time channel 2 unit A
40022
Holding
Register
Integer
1-60
sec
WRITE/READ
ITime Channel B1
Integral time channel 1 unit B
40023
Holding
Register
Integer
1-60
min
WRITE/READ
Damp Channel B2
Damp time channel 2 unit B
40024
Holding
Register
Integer
1-60
sec
WRITE/READ
Enable Input A
Enable contact unit A
30002
Input
Register
Integer
0 OR 1 - READ
0 = Off 1 = On
Channel A1
Input signal channel 1 unit A
30004
Input
Register
Integer
0-100 % READ
Displays channel 1 demand/sensed RH as a percentage of cylinder capacity for cylinder A
Channel A2
Limiter signal channel 2 unit A
30005
Input
Register
Integer
0-100 % READ
Displays channel 2 demand/sensed RH as a percentage of cylinder capacity for cylinder A
13 | Modbus Installation
Page 17
Parameter
Name
Description
Modbus
Addr.
Type
Format
Range
Unit
W/R
Details
System Demand A
System Demand A
30006
Input
Register
Integer
0-100 % READ
Demand Mode: Summation of Channel A1 and Channel A2 RH Mode: PID calculation
Safety Loop A
External safety loop unit A
30007
Input
Register
Integer
0 OR 1 - READ
0 = Open 1 = Closed
Blower Pack A
Blower ready unit A
30008
Input
Register
Integer
0 OR 1 - READ
0 = Open 1 = Closed
FanActivate A
External fan unit A
30009
Input
Register
Integer
0 OR 1 - READ
0 = Open 1 = Closed
Operating Hours A
Operating hours unit A
30010
Input
Register
Float CD
AB
0-5000
Hrs
FLOAT CD AB
Displays the total time cylinder A has been running since last reset
Enable Input B
Enable contact unit B
30012
Input
Register
Integer
0 OR 1 - READ
0 = Off 1 = On
Channel B1
Input signal channel 1 unit B
30014
Input
Register
Integer
0-100 % READ
Displays channel 1 demand/sensed RH as a percentage of cylinder capacity for cylinder B (EL-150 and EL-200 models only)
Channel B2
Limiter signal channel 2 unit B
30015
Input
Register
Integer
0-100 % READ
Displays channel 2 demand/sensed RH as a percentage of cylinder capacity for cylinder B (EL-150 and EL-200 models only)
System Demand B
System Demand B
30016
Input
Register
Integer
0-100 % READ
Demand Mode: Summation of Channel B1 and Channel B2 RH Mode: PID calculation
Safety Loop B
External safety loop unit B
30017
Input
Register
Integer
0 OR 1 - READ
0 = Open 1 = Closed
Blower Pack B
Blower ready unit B
30018
Input
Register
Integer
0 OR 1 - READ
0 = Open 1 = Closed
FanActivate B
External fan unit B
30019
Input
Register
Integer
0 OR 1 - READ
0 = Open 1 = Closed
Operating Hours B
Operating hours unit B
30020
Input
Register
Float CD
AB
0-5000
Hrs
FLOAT CD AB
Displays the total time cylinder B has been running since last reset
Modbus Installation | 14
Page 18
Parameter
Name
Description
Modbus
Addr.
Type
Format
Range
Unit
W/R
Details
Status A
Operating status unit A
31003
Input
Register
Integer
0-13 - READ
0-Humidifying 1-Standby 2-Idle Drained 3-Keep Warm 4-Filling 5-Draining 6-Remote Off 7-Safety Loop 8-Warning 9-Fault 10-Blower Pack 11-Stopped 12-Partial Drained 13-Self Test
Service Status B
Maintenance and malfunctions status unit B
31026
Input
Register
Integer
0-13 - READ
0-Humidifying 1-Standby 2-Idle Drained 3-Keep Warm 4-Filling 5-Draining 6-Remote Off 7-Safety Loop 8-Warning 9-Fault 10-Blower Pack 11-Stopped 12-Partial Drained 13-Self Test
Main Contactor A
Contactor unit A
31200
Input
Register
Integer
0 OR 1 - READ
0 = Off 1 = On
Main Contactor B
Contactor unit B
31201
Input
Register
Integer
0 OR 1 - READ
0 = Off 1 = On
Inlet A
Inlet valve unit A
31202
Input
Register
Integer
0 OR 1 - READ
0 = Off 1 = On
Inlet B
Inlet valve unit B
31203
Input
Register
Integer
0 OR 1 - READ
0 = Off 1 = On
Drain A
Drain valve unit A
31204
Input
Register
Integer
0 OR 1 - READ
0 = Off 1 = On
Drain B
Drain valve unit B
31205
Input
Register
Integer
0 OR 1 - READ
0 = Off 1 = On
15 | Modbus Installation
Page 19
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. To view or change the Modbus address:
8 Press the Menu icon on the lower left corner of the screen, to access the menu. 9 When prompted for a password, enter 0335 using the number pad. Press the Check Mark
icon to confirm.
10 Select the Configuration menu. 11 Select the Comms. menu. 12 Using the navigation buttons on the top right of the screen, scroll down to the Modbus
Parameters.
Note: By default, Modbus is disabled. To enable Modbus, select Modbus under Modbus Parameters. Select ON and confirm the selection by pressing the Check Mark button.
13 Select the Modbus Address setting. Using the Up and Down arrows, select a value between
1 and 247 inclusive as desired and press the Check Mark button to confirm the selection. It is recommended to leave the parity and baud rate settings to their factory defaults (Even and 9600 respectively) unless communication problems occur.
14 Press Back repeatedly until you return to the home screen.
This procedure is summarized below:
Main Menu > 0335 > Configuration > Comms. Menu > Modbus Parameters >
Addr: 10 (1 – 247 acceptable) Parity: Even (None, Even, Odd) Baud Rate: 9600 (9600, 19200, 38400, 115200)
Modbus Installation | 16
Page 20
Source
Analog: Use hardwired control signal Modbus: Write control signal through Modbus interface
Control Mode
Demand: Use a demand control signal RH P: Use a sensor value and proportional RH PI: Use a sensor value and proportional-integral control band
Control Channels
Single: Use a signal channel control signal Dual: Use a dual channel control signal
Signaling Type
EIA-485
Transmission Mode
RTU
Baud Rate
9600
Data Bits
8
Stop Bits
1
Parity
Even
Address / Unit Number
10*
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. 7 When prompted for a password, enter 0335 using the number pad. Press the Check Mark
icon to confirm.
8 Select the Configuration menu. 9 Select the Control Settings menu. The following settings can be adjusted:
Note: Refer to the CONTROL SETTING section of the NH Series Installation and Operation Manual for more information on the above settings.
10 Press Check Mark to confirm choice and then Back repeatedly to return to the home screen
when complete.
This procedure is summarized below:
Main Menu > 0335 > Configuration > Control Settings >
Source: Analog, Modbus, Control Mode: Demand, RH P, or RH PI Control Channels: Single or Dual
Modbus Parameters
The NH-EL uses the following parameters for Modbus communication:
*Default, may vary for multi-unit orders.
It is important to note that the signaling type, transmission mode, data bits and stop bits cannot be modified. Parity, baud rate and unit address can be modified as required.
17 | Modbus Installation
Page 21
Parameter
Name
Description
Modbus
Addr.
Type
Format
Range
Unit
R/W
Details
Dinput_A1
Write RH or Demand signal value to control channel 1 for cylinder A
40005
Holding
Register
Integer
0 - 100
%
Write
Requires Modbus or BACnet to be enabled. For most common configurations, this is the primary control signal
Dinput_A2
Write RH or Demand signal value to control channel 2 for cylinder A
40006
Holding
Register
Integer
0 - 100
%
Write
Requires Modbus or BACnet to be enabled. Only applies to NH-EL-150 and NH-EL-200 with cylinders in independent operation mode
Dinput_B1
Write RH or Demand signal value to control channel 1 for cylinder B
40010
Holding
Register
Integer
0 - 100
%
Write
Requires Modbus or BACnet to be enabled. Only applies to NH-EL-150 and NH-EL-200 with dual channel control enabled
Dinput_B2
Write RH or Demand signal value to control channel 2 for cylinder B
40011
Holding
Register
Integer
0 - 100
%
Write
Requires Modbus or BACnet to be enabled. Only applies to NH-EL-150 and NH-EL-200 with cylinders dual channel control enabled and cylinders in independent operation mode
Manual_ Capcity_A
Sets a manual capacity limit restriction for cylinder A
40002
Holding
Register
Integer
0 - 100
%
Write
Limits output to percentage of total cylinder capacity for cylinder A (NH-EL-150 and NH­EL-200 models only)
Manual_ Capcity_B
Sets a manual capacity limit restriction for cylinder B (if present)
40007
Holding
Register
Integer
0 - 100
%
Write
Limits output to percentage of total cylinder capacity for cylinder B (NH-EL-150 and NH­EL-200 models only)
BMS_ Timeout
BMS timeout for Modbus and BACnet
40013
Holding
Register
Integer
0 - 300
s
Write
It is recommend to not change the value from the factory default (300)
Remote_ Disable
Remotely disable steam production for the unit
40001
Holding
Register
Integer
0 or 1
-
Write
0 = Idle/Humidify 1 = Disable
SP_Chan_A 1
Writes the desired space setpoint for control channel 1 for cylinder A
40003
Holding
Register
Integer
0 - 95
%
Write
Use only when sending RH values to Dinput_A1. For most common configurations this is the primary space setpoint
SP_Chan_A 2
Writes the desired space setpoint for control channel 2 for cylinder A
40004
Holding
Register
Integer
10 - 95
%
Write
Use only when sending RH value to Dinput_A2 with dual channel control enabled
SP_Chan_B 1
Writes the desired space setpoint for control channel 1 for cylinder B
40008
Holding
Register
Integer
0 - 95
%
Write
Use only with NH-EL-150 and NH-EL-200 models when sending RH value to Dinput_B1 and cylinders are in independent operation mode
SP_Chan_B 2
Writes the desired space setpoint for control channel 2 for cylinder B
40009
Holding
Register
Integer
10 - 95
%
Write
Use only with NH-EL-150 and NH-EL-200 models when sending RH value to Dinput_B2 with dual channel control enabled and cylinders are in independent operation mode
The following points may be mapped for control:
Table 3: NH-EL Humidifier Modbus Parameters
Modbus Installation | 18
Page 22
Parameter
Name
Description
Modbus
Addr.
Type
Format
Range
Unit
R/W
Details
Signal_ Source
Selects signal source to control unit
40014
Holding
Register
Integer
0 - 4
-
Write
0 = Analog 1 = Modbus 2 = BACnet/IP 3 = BACnet/MS 4 = LonWorks
Control_Mo de
Selects method to control unit
40015
Holding
Register
Integer
1 - 3
-
Write
1 = Demand 2 = RH P 3 = RH PI
Control_ Channel
Selects method to control channels
40016
Holding
Register
Integer
0 - 1
-
Write
0 = Single Channel 1 = Dual Channel
Input_A1
Displays channel 1 demand for cylinder A
30004
Input
Register
Integer
0 - 100
%
Read
Displays channel 1 demand/sensed RH as a percentage of cylinder capacity for cylinder A
Input_A2
Displays channel 2 demand for cylinder A
30005
Input
Register
Integer
0 - 100
%
Read
Displays channel 2 demand/sensed RH as a percentage of cylinder capacity for cylinder A
Input_B1
Displays channel 1 demand for cylinder B
30014
Input
Register
Integer
0 - 100
%
Read
Displays channel 1 demand/sensed RH as a percentage of cylinder capacity for cylinder B (NH-EL­150 and NH-EL-200 models only)
Input_B2
Displays channel 2 demand for cylinder B
30015
Input
Register
Integer
0 - 100
%
Read
Displays channel 2 demand/sensed RH as a percentage of cylinder capacity for cylinder B (NH-EL­150 and NH-EL-200 models only)
Blower_Pac k_A
Reads the status of the blower pack for cylinder A
30008
Input
Register
Integer
0 or 1
-
Read
0 = Open 1 = Closed
Blower_Pac k_B
Reads the status of the blower pack for cylinder B
30018
Input
Register
Integer
0 or 1
-
Read
0 = Open 1 = Closed
Fan_Activat e_A
Indicates if air handle or furnace is activated for cylinder A
30009
Input
Register
Integer
0 or 1
-
Read
0 = Not Activated 1 = Activated
Fan_Activat e_B
Indicates if air handle or furnace is activated for cylinder B
30019
Input
Register
Integer
0 or 1
-
Read
0 = Not Activated 1 = Activated
Do_Fault_A
Reads the status of a fault on the unit
30025
Input
Register
Integer
0 or 1
-
Read
0 = No Fault 1 = Fault
Do_Service _A
Reads the status of a service request on the unit
30024
Input
Register
Integer
0 or 1
-
Read
0 = No Service Required 1 = Service Required
19 | Modbus Installation
Page 23
Parameter
Name
Description
Modbus
Addr.
Type
Format
Range
Unit
R/W
Details
Humidifier_ Status_A
Reads the status of the unit for cylinder A
30003
Input
Register
Integer
0 - 9
-
Read
0 = Humidifying 1 = Idle 2 = Idle Drain 3 = Keepwarm 4 = Filling 5 = Draining 6 = Disabled 7 = Safety Loop 8 = Warning 9 = Fault
Humidifier_ Status_B
Reads the status of the unit for cylinder A
30026
Input
Register
Integer
0 - 9
-
Read
0 = Humidifying 1 = Idle 2 = Idle Drain 3 = Keepwarm 4 = Filling 5 = Draining 6 = Disabled 7 = Safety Loop 8 = Warning 9 = Fault
System_ Demand_A
Reads the demand for cylinder A
30006
Input
Register
Integer
0 – 100
%
Read
Demand Mode:
Summation of Input_A1 and Input_A2
RH Mode:
PID calculation
System_ Demand_B
Reads the demand for cylinder A
30016
Input
Register
Integer
0 – 100
%
Read
Demand Mode:
Summation of Input_B1 and Input_B2
RH Mode:
PID calculation
Safety_Loo p_A
Reads the status of the safety loop for cylinder A
30007
Input
Register
Integer
0 or 1
-
Read
0 = Open 1 = Closed
Safety_Loo p_B
Reads the status of the safety loop for cylinder B
30017
Input
Register
Integer
0 or 1
-
Read
0 = Open 1 = Closed
Run_Time_ A
Reads operating time for cylinder A
30010
Input
Register
Integer
0 -
5000
Hrs
Read
Displays the total time cylinder A has been running since last reset
Run_Time_ B
Reads operating time for cylinder B
30020
Input
Register
Integer
0 -
5000
Hrs
Read
Displays the total time cylinder B has been running since last reset
Weighted_ Hours_A
Reads the weighted time for cylinder A
30011
Input
Register
Integer
0 -
5000
Hrs
Read
An equated run time based on Run_Time_A x System_Demand_A
Weighted_ Hours_B
Reads the weighted time for cylinder B
30021
Input
Register
Integer
0 -
5000
Hrs
Read
An equated run time based on Run_Time_A x System_Demand_A
Modbus Installation | 20
Page 24
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. To view or change the unit number:
1 Press the Menu key to access the menu. 2 When prompted for a password, enter 0459 using the arrow keys. Press Set to confirm. 3 Select the Factory Settings menu and press the Set key. 4 Select the Core Parameters menu and press the Set key. 5 Select the Modbus Parameters menu and press the Set key.
Note: Do NOT modify other settings in the Factory settings manual. Adjusting other settings can cause serious damage to the humidifier.
11 Select the Address setting and press Set to modify. Enter a value between 1 and 127
inclusive as desired and press Set to confirm the solution. It is recommended to leave the parity and timeout settings to their factory defaults (Even and 300 respectively) unless communication problems occur.
12 Press Esc repeatedly until you return to the home screen.
This procedure is summarized below:
Menu > 0459 > Factory Settings > Core Parameters > Modbus Parameters >
Parity: Even Addr: 1 (Default, 1 – 127 acceptable) Timeout: 300 seconds (Default, 5 – 600 acceptable)
21 | Modbus Installation
Page 25
Source
Analog: Use hardwired control signal Digital: Write control signal through Modbus interface
REG Mode
Demand: Use a demand control signal RHp: Use a sensor value and proportional RHpi: Use a sensor value and proportional-integral control band
MOD Mode
Single CH: Use a signal channel control signal Dual CH: Use a dual channel control signal
CNT Type
Setting not relevant when writing control signal through Modbus.
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. 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:
Note: Refer to the CONTROL SETTING section of the NH Series Installation and Operation Manual for more information on the above settings.
4 Press Esc repeatedly to return to the home screen when complete.
This procedure is summarized below:
Menu > 0335 > Control Settings >
Source: Analog or Digital Reg Mode: Demand, RHp, or RHpi Mod Mode: Single CH or Dual CH CNT Type: As required
Modbus Installation | 22
Page 26
Signaling Type
EIA-485
Transmission Mode
RTU
Baud Rate
9600
Data Bits
8
Stop Bits
1
Parity
Even
Address / Unit Number
1*
Modbus Parameters
The NHTC uses the following parameters for communication:
*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. Parity and unit address can be modified as required.
23 | Modbus Installation
Page 27
Variable
Name
Description
Addr.
Type
Format
Range
Unit
R/W
Details
CapLimitCyl1
Sets a manual capacity restriction for cylinder 1.
40026
Holding
Register
Integer
50-100
%
Write
Limits output to percentage of total cylinder capacity
CapLimitCyl2
Sets a manual capacity restriction for cylinder 2 (if present).
41026
Holding
Register
Integer
50-100
%
Write
Limits output to percentage of total cylinder capacity for cylinder 2 (NHTC-150 and NHTC-200 models only)
RHDemCyl1
Write RH or Demand signal value to control channel 1 for cylinder 1
40264
Holding
Register
Integer
0 - 100
%
Write
Requires network controls (NetSensor =
1), for most common configurations this is the primary control signal
RHDemCyl2
Write RH or Demand signal value to control channel 1 for cylinder 2
41264
Holding
Register
Integer
0 - 100
%
Write
Requires network controls (NetSensor =
1), only applies to NHTC-150 and NHTC­200 with cylinders in independent operation mode
RHDem2Cyl1
Write RH or Demand signal value to control channel 2 for cylinder 1
40265
Holding
Register
Integer
0 - 100
%
Write
Requires network controls (NetSensor =
1), only applies to NHTC-150 and NHTC­200 with dual channel control enabled
RHDem2Cyl2
Write RH or Demand signal value to control channel 2 for cylinder 2
41265
Holding
Register
Integer
0 - 100
%
Write
Requires network controls (NetSensor =
1), only applies to NHTC-150 and NHTC­200 with cylinders dual channel control enabled and cylinders in independent operation mode
Set1Cyl1
Writes the desired space setpoint for control channel 1 for cylinder 1
40024
Holding
Register
Integer
30-95
%
Write
Use only when sending RH value to RHDem1, for most common configurations this is the primary space setpoint
Set1Cyl2
Writes the desired space setpoint for control channel 1 for cylinder 2
41024
Holding
Register
Integer
30-95
%
Write
Use only with NHTC­150 and NHTC-200 models when sending RH value to RHDem1 and cylinders are in independent operation mode
Set2Cyl1
Writes the desired space setpoint for control channel 2 for cylinder 1
40010
Holding
Register
Integer
30-95
%
Write
Use only when sending RH value to RHDem2 with dual channel control enabled
The following points may be mapped for control:
Table 4: NHTC Humidifier Modbus Parameters
Modbus Installation | 24
Page 28
Variable
Name
Description
Addr.
Type
Format
Range
Unit
R/W
Details
Set2Cyl2
Writes the desired space setpoint for control channel 2 for cylinder 2
41010
Holding
Register
Integer
30-95
%
Write
Use only with NHTC­150 and NHTC-200 models when sending RH value to RHDem2 with dual channel control enabled and cylinders are in independent operation mode
DisableCyl1
Remotely disable steam production for cylinder 1
40262
Holding
Register
Integer
0 or 255
-
Write
0 = Normal operation 255 = Disabled
DisableCyl2
Remotely disable steam production for cylinder 2
41262
Holding
Register
Integer
0 or 255
-
Write
Used only for NHTC­150 and NHTC-200 models. Both cylinder 1 and 2 must be disabled to completely disable humidifier. 0 = Normal operation 255 = Disabled
NetSensor
Switches between hard wired or network control signal
40226
Holding
Register
Integer
0 or 1
-
Write
1= Network sensor or demand 0 = Wired sensor or wired demand
Ch1DemCyl1
Displays channel 1 demand for cylinder 1
30348
Input
Register
Integer
0 - 100
%
Read
Displays channel 1 demand as a percentage of cylinder capacity for cylinder 1
Ch1DemCyl2
Displays channel 1 demand for cylinder 2
31348
Input
Register
Integer
0 - 100
%
Read
Displays channel 1 demand / output as a percentage of cylinder capacity for cylinder 2 (NHTC-150 and NHTC­200 models only)
Ch2DemCyl1
Displays channel 2 demand for cylinder 1
30349
Input
Register
Integer
0 - 100
%
Read
Displays channel 2 demand as a percentage of cylinder capacity for cylinder 1
Ch2DemCyl2
Displays channel 2 demand for cylinder 2
31349
Input
Register
Integer
0 - 100
%
Read
Displays channel 2 demand / output as a percentage of cylinder capacity for cylinder 2 (NHTC-150 and NHTC­200 models only)
Fault Warning
Reads fault status
30301
Input
Register
Integer
0 or 255
-
Read
0 = No Fault 255 = Fault Warning
Service Warning
Reads service warning status
30300
Input
Register
Integer
0 or 255
-
Read
0 = No Service Warning 255 = Service Warning
Unit Status
Reads unit status
30312
Input
Register
Integer
0 or 255
-
Read
0 = Idle / Standby 255 = Active / Humidifying
Cyl1OpTime
Reads operating time for cylinder 1
30213
Input
Register
Integer
0 -
65535
5
min
Read
Reads operating time for cylinder 1. Each number is equivalent to 5 minutes of operation. Time in hours = (Value x 5)/60
25 | Modbus Installation
Page 29
Variable
Name
Description
Addr.
Type
Format
Range
Unit
R/W
Details
Cyl2OpTime
Reads operating time for cylinder 2
31213
Input
Register
Integer
0 -
65535
5
min
Read
Reads operating time for cylinder 2 (NHTC­150 and NHTC-200 only). Each number is equivalent to 5 minutes of operation. Time in hours = (Value x 5)/60
UnitStatus
Displays status warnings
31385
Input
Register
Integer
0-99
-
Read
11 = Security loop open 19 = Cylinder spent warning If status 19, unit will have yellow service light on and will continue to run for 72hrs
CylSpent
Displays cylinder end of life fault
30378
Input
Register
Integer
0-99
-
Read
Unit will not run until cylinder is replaced 19 = Cylinder spend fault
SysTotalDem
Displays the total demand on system (sum both cylinders)
30251
Input
Register
Integer
0 - 100
%
Read
Sum of Steam Output Cyl-1 and Cyl-2 in percentage
Modbus Installation | 26
Page 30
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.
To view or change the unit number:
1 Press the Menu key to access the menu. 2 When prompted for a password, enter 0335 using the arrow keys. Press Set to confirm. 3 Select the Control Settings menu and press the Set key. 4 Select the Modbus Parameters menu and press the Set key. 5 Select the Address setting and press Set to modify. Enter a value between 1 and 127
inclusive as desired and press Set to confirm the solution. It is recommended to leave the parity and timeout settings to their factory defaults (None1 and 300 respectively) unless communication problems occur.
6 Press Esc repeatedly until you return to the home screen.
This procedure is summarized below:
Menu > 0335 > Control Settings > Modbus Parameters >
Parity: None1 Addr: 1 (Default, 1 – 127 acceptable) Timeout: 300 seconds (Default, 5 – 600 acceptable)
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.
27 | Modbus Installation
Page 31
Source:
Analog: Use hardwired control signal Digital: Write control signal through modbus interface
REG Mode:
Demand: Use a demand control signal RHp: Use a sensor value and proportional RHpi: Use a sensor value and proportional-integral control band
MOD Mode:
Single CH: Use a signal channel control signal Dual CH: Use a dual channel control signal
CNT Type:
Setting not relevant when writing control signal through modbus.
Signaling Type
EIA-485
Transmission Mode
RTU
Baud Rate
9600
Data Bits
8
Stop Bits
1
Parity
None
Address / Unit Number
1*
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:
Note: Refer to the GSTC Total Controller Flow Chart section of the GS Series Installation and Operation Manual for more information on the above settings.
4 Press Esc repeatedly to return to the home screen when complete.
This procedure is summarized below:
Menu > 0335 > Control Settings >
Source: Analog or Digital Reg Mode: Demand, RHp, or RHpi Mod Mode: Single CH or Dual CH CNT Type: As required
Modbus Parameters
The GSTC uses the following parameters for communication:
*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. Parity and unit address can be modified as required.
Modbus Installation | 28
Page 32
Variable
Name
Description
Addr
Type
Format
Range
Unit
R/W
Additional Details
RHDem1
Write RH or Demand signal value to control channel 1
40264
Holding
Register
Analog
0-100
%
Write
Requires network controls (NetSensor = 1)
RhDem2
Write RH or Demand signal value to control channel 2
40265
Holding
Register
Analog
0-100
%
Write
Requires network controls (NetSensor = 1)
Set1
Writes the desired space setpoint for control channel 1
40024
Holding
Register
Analog
30-95
%
Write
Use only when sending RH value to RHDem1
Set2
Writes the desired space setpoint for control channel 2
40025
Holding
Register
Analog
30-95
%
Write
Use only when sending RH value to RHDem2
Disable
Remotely disables the humidifier
40262
Holding
Register
Analog
0, 255
-
Write
0 = Run 255 = Disable
InputType
Selects the control type that the humidifier operates on
40007
Holding
Register
Analog
0,1,2,3,
-
Write
0 = Demand Signal 1 = On/Off Signal 2 = RH Sensor Value (Use Proportional Control) 3 = RH Sensor Value (Use Proportional­Integral Control)
NetSensor
Switches between hard wired or network control signal
40226
Holding
Register
Binary
0,1
-
Write
0 = Hard wired control signal 1 = Use Modbus to write control signal value
RHDem1
Read RH or Demand signal value from control Channel 1
30348
Input
Register
Analog
0-100
%
Read
Displays signal value as a percentage
RHDem2
Read RH or Demand signal value from control Channel 2
30349
Input
Register
Analog
0-100
%
Read
Displays signal value as a percentage
Set1
Read space setpoint for control channel 1
40024
Input
Register
Analog
30-95
%
Read
Only available for InputType 2 or 3
Set2
Read space setpoint for control channel 2
40025
Input
Register
Analog
30-95
%
Read
Only available for InputType 2 or 3
Disable
Confirms remote disable status
30989
Input
Register
Analog
0, 255
-
Read
0 = Run 255 = Disable
InputType
Confirms the control type that the humidifier operates on
40007
Input
Register
Analog
0,1,2,3
-
Read
0 = Demand Signal 1 = On/Off Signal 2 = RH Sensor Value (Use Proportional Control) 3 = RH Sensor Value (Use Proportional­Integral Control)
NetSensor
Confirms the system control type
40226
Input
Register
Binary
0,1
-
Read
0 = Hard wired control signal 1 = Use Modbus to write control signal value
The following points may be mapped for control:
Table 5: GSTC Humidifier Modbus Parameters
29 | Modbus Installation
Page 33
Variable
Name
Description
Addr
Type
Format
Range
Unit
R/W
Additional Details
Fault
Read fault status
30301
Input
Register
Binary
0,1
-
Read
0 = No Fault 1 = Fault Detected
Service
Read service warning status
30300
Input
Register
Binary
0,1
-
Read
0 = No Service Warning 1 = Service Required
Status
Read humidification status
30302
Input
Register
Binary
0,1
-
Read
0 = Idle / Standby 1 = Active / Humidifying
Connection
Read connection status
40267
Input
Register
Binary
0,1
-
Read
0 = Communication Error 1 = Normal Communication
HourOpt
Read operational hours of unit
30350
Input
Register
Analog
0 -
Infinity
hrs
Read
Displays hours of operation.
KeepWarm
Read keepwarm option status (enable/disable at humidifier)
30356
Input
Register
Analog
0,1
-
Read
Bit0 - KEEPWARM 0 = Disabled 1 = Enabled
3DayDrain
Read 3 day drain option status (enable/disable at humidifier)
30356
Input
Register
Analog
0,1
-
Read
Bit1 - 3 DAY DRAIN 0 = Disabled 1 = Enabled
SysDemand
Read system output / demand
30347
Input
Register
Analog
0-100
%
Read
Displays output as percentage of capacity
ServHours
Read hours before next service
30352
Input
Register
Analog
500-0
hrs
Read
Displays hours remaining until next service.
SecurityLoop
Displays status of security loop.
30364
Input
Register
Analog
0,1
-
Read
Displays the status of the security loop on terminals 1 and 2. Loop must be "closed" for humidifier to operate. 0 = Open 1 = Closed
Modbus Installation | 30
Page 34
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.
To view or change the unit number:
1 Press the Menu key to access the menu. 2 When prompted for a password, enter 0335 using the arrow keys. Press Set to confirm. 3 Select the Control Settings menu and press the Set key. 4 Select the Modbus Parameters menu and press the Set key. 5 Select the Address setting and press Set to modify. Enter a value between 1 and 127
inclusive as desired and press Set to confirm the solution. It is recommended to leave the parity and timeout settings to their factory defaults (None1 and 300 respectively) unless communication problems occur.
6 Press Esc repeatedly until you return to the home screen.
This procedure is summarized below:
Menu > 0335 > Control Settings > Modbus Parameters >
Parity: None1 Addr: 1 (Default, 1 – 127 acceptable) Timeout: 300 seconds (Default, 5 – 600 acceptable)
31 | Modbus Installation
Page 35
Source
Analog: Use hardwired control signal Digital: Write control signal through Modbus interface
REG Mode
Demand: Use a demand control signal RHp: Use a sensor value and proportional RHpi: Use a sensor value and proportional-integral control band
MOD Mode
Single CH: Use a signal channel control signal Dual CH: Use a dual channel control signal
CNT Type
Setting not relevant when writing control signal through Modbus.
Signaling Type
EIA-485
Transmission Mode
RTU
Baud Rate
9600
Data Bits
8
Stop Bits
1
Parity
None
Address / Unit Number
1*
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. 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:
Note: Refer to the SETC Humidifier Configuration section of the SE Series Installation and Operation Manual for more information on the above settings.
1 Press Esc repeatedly to return to the home screen when complete.
This procedure is summarized below:
Menu > 0335 > Control Settings >
Source: Analog or Digital Reg Mode: Demand, RHp, or RHpi Mod Mode: Single CH or Dual CH CNT Type: As required
Modbus Parameters
The SETC uses the following parameters for communication:
*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. Parity and unit address can be modified as required.
Modbus Installation | 32
Page 36
Variable
Name
Description
Addr
Type
Format
Range
Unit
R/W
Additional Details
RHDem1
Write RH or Demand signal value to control channel 1
40264
Holding
Register
Analog
0-100
%
Write
Requires network controls (NetSensor = 1)
RhDem2
Write RH or Demand signal value to control channel 2
40265
Holding
Register
Analog
0-100
%
Write
Requires network controls (NetSensor = 1)
Set1
Writes the desired space setpoint for control channel 1
40024
Holding
Register
Analog
30-95
%
Write
Use only when sending RH value to RHDem1
Set2
Writes the desired space setpoint for control channel 2
40025
Holding
Register
Analog
30-95
%
Write
Use only when sending RH value to RHDem2
Disable
Remotely disables the humidifier
40262
Holding
Register
Analog
0, 255
-
Write
0 = Run 255 = Disable
InputType
Selects the control type that the humidifier operates on
40007
Holding
Register
Analog
0,1,2,3
-
Write
0 = Demand Signal 1 = On/Off Signal 2 = RH Sensor Value (Use Proportional Control) 3 = RH Sensor Value (Use Proportional­Integral Control)
NetSenso r
Switches between hard wired or network control signal
40226
Holding
Register
Binary
0,1
-
Write
0 = Hard wired control signal 1 = Use Modbus to write control signal value
RHDem1
Read RH or Demand signal value from control Channel 1
30348
Input
Register
Analog
0-100
%
Read
Displays signal value as a percentage
RHDem2
Read RH or Demand signal value from control Channel 2
30349
Input
Register
Analog
0-100
%
Read
Displays signal value as a percentage
Set1
Read space setpoint for control channel 1
40024
Input
Register
Analog
30-95
%
Read
Only available for InputType 2 or 3
Set2
Read space setpoint for control channel 2
40025
Input
Register
Analog
30-95
%
Read
Only available for InputType 2 or 3
Disable
Confirms remote disable status
30989
Input
Register
Analog
0, 255
-
Read
0 = Run 255 = Disable
InputType
Confirms the control type that the humidifier operates on
40007
Input
Register
Analog
0,1,2,3
-
Read
0 = Demand Signal 1 = On/Off Signal 2 = RH Sensor Value (Use Proportional Control) 3 = RH Sensor Value (Use Proportional­Integral Control)
NetSenso r
Confirms the system control type
40226
Input
Register
Binary
0,1
-
Read
0 = Hard wired control signal 1 = Use Modbus to write control signal value
Fault
Read fault status
30301
Input
Register
Binary
0,1 - Read
0 = No Fault 1 = Fault Detected
Service
Read service warning status
30300
Input
Register
Binary
0,1 - Read
0 = No Service Warning
The following points may be mapped for control:
Table 6: SETC Humidifier Modbus Parameters
33 | Modbus Installation
Page 37
Variable
Name
Description
Addr
Type
Format
Range
Unit
R/W
Additional Details
1 = Service Required
Status
Read humidification status
30302
Input
Register
Binary
0,1 - Read
0 = Idle / Standby 1 = Active / Humidifying
Connecti on
Read connection status
40267
Input
Register
Binary
0,1 - Read
0 = Communication Error 1 = Normal Communication
HourOpt
Read operational hours of unit
30350
Input
Register
Analog
0 -
Infi
nity
hrs
Read
Displays hours of operation.
KeepWar m
Read keepwarm option status (enable/disable at humidifier)
30356
Input
Register
Analog
0,1 - Read
Bit0 - KEEPWARM 0 = Disabled 1 = Enabled
3DayDrai n
Read 3 day drain option status (enable/disable at humidifier)
30356
Input
Register
Analog
0,1 - Read
Bit1 - 3 DAY DRAIN 0 = Disabled 1 = Enabled
SysDema nd
Read system output / demand
30347
Input
Register
Analog
0-
100
%
Read
Displays output as percentage of capacity
ServHour s
Read hours before next service
30352
Input
Register
Analog
500
-0
hrs
Read
Displays hours remaining until next service.
SecurityL oop
Displays status of security loop.
30364
Input
Register
Analog
0,1 - Read
Displays the status of the security loop on terminals 1 and
2. Loop must be "closed" for humidifier to operate. 0 = Open 1 = Closed
Modbus Installation | 34
Page 38
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.
To view or change the unit number:
1 Press the Menu key to access the menu. 2 Select the User option and press Set. 3 When prompted for a password, enter 8808 using the arrow keys. Press Set to confirm. 4 Select the Settings menu and press the Set key. 5 Select the Modbus menu and press the Set key. 6 Select the Address setting and press Set to modify. Enter a value between 1 and 127
inclusive as desired and press Set to confirm the solution. It is recommended to leave the parity and timeout settings to their factory defaults (None1 and 300 respectively) unless communication problems occur.
7 Press Esc repeatedly until you return to the home screen.
This procedure is summarized below:
Menu > User > 8808 > Modbus >
Parity: None1 Addr: 1 (Default, 1 – 127 acceptable) Timeout: 300 seconds (Default, 5 – 600 acceptable)
35 | Modbus Installation
Page 39
Signal Source
Analog: Use hardwired control signal Modbus: Write control signal through Modbus interface
Hum. Control
External: Use a demand control signal Int(p): Use a sensor value and proportional int(pi): Use a sensor value and proportional-integral control band
Control Sign
Setting not relevant when writing control signal through Modbus.
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. 2 Select the User options and press Set. 3 When prompted for a password, enter 8808 using the arrow keys. Confirm the password
with set.
4 Select the Controls menu and press the Set key. The following settings can be adjusted:
Note: Refer to the MHTC Humidifier Configuration section of the MH Series Installation and Operation Manual for more information on the above settings.
1 Press Esc repeatedly to return to the home screen when complete.
This procedure is summarized below:
Menu > User > 8808 > Controls >
Signal Source: Analog or Modbus Hum. Control: External, Int(p), or Int(pi) Control Sign: As required
Modbus Installation | 36
Page 40
Signaling Type
EIA-485
Transmission Mode
RTU
Baud Rate
9600 (cannot be changed)
Data Bits
8
Stop Bits
1
Parity
None
Address / Unit Number
1*
Variable Name
Description
Addr
Type
Format
Range
Unit
R/W
Details
CapLimit
Manual Capacity Limit
40008
Holding
Register
Integer
30 ­100
%
Write
Limits unit output.
RHDem1
Reads/writes a control signal to the humidifier
40053
Holding
Register
Integer
0 - 100
%
Write
Writes a control signal to the humidifier. This input only works if humidifier is set to network control NetSensor set to 1) in the control settings. If the system is set to network control no signal is detected, the unit will display the modbus timeout error.
Set1
Reads/Writes the desired space setpoint
40005
Holding
Register
Integer
10 - 90
%
Write
Used when Hum_Control = 2 or 3 only
Disable
Remotely disables humidifier
40052
Holding
Register
Integer
0 or 1
-
Write
0 = Allow normal humidifier operation 1 = Remotely disables the humidifier
Hum_Control
Selects the control type that the humidifier operates on
40003
Holding
Register
Integer
0 - 3
-
Write
0 = Demand Signal 1 = On/Off Signal 2 = RH Sensor Value (Use Proportional control method) 3 = RH Sensor Value (Use Proportional-Integral control method)
NetSensor
Switches between hard wired or network control signal
40002
Holding
Register
Integer
0 or 1
-
Write
0 = Wired Analog Sensor/Demand 1 = Modbus/Remote Sensor/Demand
Stage1Dem
Indicates output from humidifier stage 1
30025
Input
Register
Integer
0 or 1
-
Read
0 = Inactive 1 = Active
Modbus Parameters
The MHTC uses the following parameters for communication:
*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. Parity and unit address can be modified as required.
The following points may be mapped for control:
Table 7: MHTC Humidifier Modbus Parameters
37 | Modbus Installation
Page 41
Variable Name
Description
Addr
Type
Format
Range
Unit
R/W
Details
Stage2Dem
Indicates output from humidifier stage 2
30026
Input
Register
Integer
0 or 1
-
Read
0 = Inactive 1 = Active
Stage3Dem
Indicates output from humidifier stage 3
30027
Input
Register
Integer
0 or 1
-
Read
0 = Inactive 1 = Active
Warning
Indicates warning status
30015
Input
Register
Integer
0 or 1
-
Read
0 = No warning 1 = Warning
Service
Indicates maintenance requirement
30016
Input
Register
Integer
0 or 1
-
Read
0 = No service required 1 = Service required
Fault
Indicates fault status
30017
Input
Register
Integer
0 or 1
-
Read
0 = No error 1 = Error(s) detected
Cleaning
Indicates automatic stage cleaning cycle status
30018
Input
Register
Integer
0 or 1
-
Read
0 = Inactive 1 = Active
TankDrain
Indicates automatic tank drain status
30019
Input
Register
Integer
0 or 1
-
Read
0 = Inactive 1 = Active
PumpRunHr
Displays pump operational hours
30100
Input
Register
Integer
0 -
65535
10
min
Read
1Bit = 10min (max. 10’922h)
UVRunHr
Displays UV lamp operational hours
30101
Input
Register
Integer
0 -
65535
10
min
Read
1Bit = 10min (max. 10’922h)
ServTime
Displays unit operational hours
30102
Input
Register
Integer
0 -
65535
10
min
Read
1Bit = 10min (max. 10’922h)
Security
Indicates security loop status (humidifier terminals 1 and
2)
30200
Input
Register
Integer
0 or 1
-
Read
Humidifier will only operate when security loop is closed. 0 = Off 1 = On
TankLevel
Max Level Sensor
30202
Input
Register
Integer
0 or 1
-
Read
0 = Tank below full level 1 = Tank full
System Ready
Indicates when the humidifier is ready to commence stages
30013
Input
Register
Integer
0 or 1
-
Read
0 = System busy (cleaning or draining) 1 = System ready to Humidify
Modbus Installation | 38
Page 42
Jumper Position
Function
J26 Removed
Terminal strip control
J26 Installed
Modbus control
Signaling Type
EIA-485
Transmission Mode
RTU
Baud Rate
9600 (can be changed to 4800 bps or 19200 bps)
Data Bits
8
Stop Bits
1
Parity
Even
Address / Unit Number
1*
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. Values of 1 – 255 are
acceptable.
By default the MES2 and RH2 are configured operate on a control signal supplied through the unit terminal strip. This can be changed to allow the humidifier to function entirely through its Modbus interface. This is configured by removed Jumper 26 from the humidifier circuit board.
MES2 and RH2 Electrode Steam OEM Humidifiers
The MES2 and RH2 both use the following parameters for communication:
*Default, may vary for multi-unit orders.
39 | Modbus Installation
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 Name
Description
Addr
Type
Format
Range
Unit
R/W
Details
HumEnable
Configures how humidifier responds to modbus controls
40003
Holding
Register
Integer
0,255
-
Write
0 = Disable operation of humidifier (Default Value) 255 = Allow operation of humidifier within limits specified by CapLimit
Notes:
- If a valid Modbus message is not received within the timeout windows, this parameter reverts to 0.
- This value cannot be set when the FORCE DRAIN is activated as. FORCE DRAIN temporarily sets this to value 0.
- Jumper J26 must be installed to write any parameter over the Modbus. J26 sets it into the control mode.
- Opening of the hardwired security loop (terminals 1 and 2) will override operation even if 255 is written.
CapLimit
Imposes a maximum output limit as percentage of unit capacity.
40004
Holding
Register
Integer
25 ­100
%
Write
Values outside of 25 - 100% return an error. Default on startup = 25.
ForceDrain
Manually initiates a drain period.
40005
Holding
Register
Integer
0, 255
-
Write
0 = Normal operation (Default) 255 = Initiate a 20 minute timer during which the drain is active.
Notes:
- During a force drain, humidification ceases.
- Writing 0 during 20 minute period will cancel the drain.
- After 20 minutes this value will revert to 0 and the humidifier will resume normal operation.
ModAddress
Writes a new Modbus address for the humidifier.
40201
Holding
Register
Integer
1-255
-
Write
Default = 1. Values of 1 ­255 are acceptable. Changes to this variable do not take effect until the humidifier has been power cycled.
Baud
Sets the Modbus baud rate
40202
Holding
Register
Integer
0,1,2
-
Write
Changes to this variable do not take effect until the humidifier has been power cycled. 0 = 4800 bps 1 = 9600 bps (Default) 2 = 19200 bps
Parity
Set Modbus Parity
40203
Holding
Register
Integer
0,1,2
-
Write
Changes to this variable do not take effect until the humidifier has been power cycled. 0 = No parity 1 = Even parity (Default) 2 = Odd parity
Modbus Installation | 42
Page 46
RunHrReset
Allows the run hour counter to be reset to 0, typically used following maintenance.
40006
Holding
Register
Integer
0, 255
-
Write
Requires that HumEnable is set to 0 (disabled) first or ILLEGAL DATA error will occur. 255 = Reset the run time hours (reported in RunHrs) to 0. Value reverts to 0 after operation is complete.
Units
Switches between imperial (lbs/hr) and metric (kg/hr) units.
40204
Holding
Register
Integer
0,1
-
Write
0 = Imperial (lbs/hr) 1 = Metric (kg/hr) Changes values reported in Model (40205) and SteamOutput (30105).
Model
Allows writing of humidifier capacity to match model.
40205
Holding
Register
Integer
0 - 30
-
Write
Value represents maximum unit capacity, in lbs/hr, at 100% Fill Off Amps. Value cannot be written while HumEnable = 255 (operational). The MES-005 would be written as 5. (Default = 8)
Voltage
Unit voltage
40206
Holding
Register
Integer
1 to 10
-
Write
Reads the jumper (J1 thru 6) pin settings and reports the voltage: 0: 110-120V (J6 installed) 1: 208V (J6 installed) 2: 220-240V (J5 installed) 3: 230V 4: 277V (J4 installed) 5: 347V 6: 380V (J3 installed) 7: 400V (J3 installed) 8: 415V (J3 installed) 9: 440-480V (J2 installed, Default) 10: 550-600V (J1 installed)
Phase
Unit voltage phases
40207
Holding
Register
Integer
0,1,2
-
Write
0 = Single phase 1 = 3 phase (Default) 2 = 3 phase (6 electrode)
ForceReset
Resets the controller and restarts in standby.
40007
Holding
Register
integer
0,255
-
Write
Write 255 to this register to reset the control. The controller will reset, restart, and remain in standby mode. After completion:
- WasReset (40002 )will read 255 (reset has occurred)
- HumEnable (40003) will read 0 (unit is disabled)
TimeWindow
Sets the permissible window for modbus data to be written.
40208
Holding
Register
Integer
0 - 255
-
Write
Each integer is a multiple of 200mS. Maximum time of 51 secs occurs when the register reads 255. A value of 0 disables the timeout, but can only be written with HumEnable (40003) is set to 0 (disabled).
43 | Modbus Installation
Page 47
Current
Displays current draw in Amps.
30104
Input
Register
Integer
0 -
12495
Amps
Read
Each bit represents 0.0024 Amps, therefore 1 Amp = 416 bits. The Amp value does not clear when security loop is open and the demand is 0. The last detected value remains in the register.
SteamOutput
Displays the steam output in either Metric of Imperial units.
30105
Input
Register
Integer
0 - 300
lbs/hr
kg/hr
Read
Units are defined in Units (register 40204). Unit includes decimal point as integer value. Example: 17 = 1.7 (kg/hr or lbs/hr) This variable does not clear when the security loop is open and the demand 0. The last detected value remains in the register.
RunHrs
Run hour Counter
30106
Input
Register
Integer
0 -
24000
min
Read
Steam production hours since last reset. Max possible 2000 hrs of operation. Each integer is a multiple of 5 minutes. Example: 1 = 5minutes 12 = 60 minutes (1 hr)
Firmware
Displays unit firmware version.
30113
Input
Register
Integer
- - Read
Example: 352 = Version
3.52
Status
Displays status of various components.
30107
Input
Register
Integer
0 - 128
-
Read
Significant bits: 1 (Bit 0), 2 (Bit 1), 4 (Bit 2), 8 (Bit 3), 16 (Bit 4), 32 (Bit 5), 64 (Bit 6), 128 (Bit 7). Bit 0 = Contactor Bit 1 = Fill Valve Bit 2 = Drain Valve Bit 3 = Blower pack fan Bit 4 = Collective fault (see 30108 for details) Bit 5 = Humidifier Active
A “1” in the appropriate bit
location indicates that the component is active.
MaxOutput
Displays the maximum capacity of humidifier.
30111
Input
Register
Integer
0 - 30
lbs/hr
Read
The maximum amount of steam per hour that the humidifier can produce in lbs/hr. This value is copied from Model (40205).
Modulation
Displays the value of modulating signal when a local modulating humidistat is used.
30102
Input
Register
Integer
0-1023
-
Read
Values are displayed as whole numbers with 2 decimals places. Example: 1023 = 10.23 volts 500 = 5.00 volts A constant value of 1023 can indicate the jumper J10 is installed.
FaultCode
Indicates the presence of a fault and which fault has been detected.
30108
Input
Register
Integer
0-
32768
-
Read
0 = (Amber LED 1 flash) Excess current. 1 = (Amber LED 3 flash) High water level, no current. 2 = (Amber LED 2 flash) No current detected 3 = (Amber LED 4 flash) End of cylinder life.
Modbus Installation | 44
Page 48
CtrlStatus1
Describes controller hardware and jumper statuses.
30109
Input
Register
Integer
0-
32768
-
Read
Uses significant bits 0 through 15 (1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768 respectively).
Bit 1 - Electrodes passing current (0 = On) Bit 2 - FAULT Relay (0 = On) Bit 3 - YELLOW LED (1 = Illuminated) Bit 4 - GREEN LED (0 = Illuminated) Bit 5 - FAN (1 = On) Bit 8 - High Water Input (0 = High Water)
CtrlStatus2
Hardware status Port D_E
30110
Input
Register
Integer
0-
32768
-
Read
Bit 4 - MODBUS Control Active (0 = J26 installed) Bit 9 - FILL (1 = Active) Bit 10 - DRAIN (1 = Active)
45 | Modbus Installation
Page 49
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.
To view or change the unit number:
1 Press both the ↑ and ↓keys simultaneously to access the menu. 2 When prompted for a password, enter 8808 using the arrow keys. 3 Scroll through the menu until and select the Modbus Address. 4 Enter a value between 1 and 127 inclusive as desired. 5 Press both the ↑ and ↓keys simultaneously to return to the main menu.
This procedure is summarized below:
↑ and ↓ > 8808 > Modbus Address > 1 to 127
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 Establish Modbus communications and map points as indicated in the following table. 2 Write a value of 1 to address 40039. A value of 1 indicates control through Modbus, a value
of 0 indicates controls hardwire to terminal strip.
The control type can also be modified:
1 Press both the ↑ and ↓keys simultaneously to access the menu. 2 When prompted for a password, enter 8808 using the arrow keys. 3 Scroll through the menu until and select the Controller Func. 4 Select Off for a demand type control, or On for sensor (transducer) control. 5 Press both the ↑ and ↓keys simultaneously to return to the main menu.
Modbus Installation | 46
Page 50
Signaling Type
EIA-485
Transmission Mode
RTU
Baud Rate
9600
Data Bits
8
Stop Bits
1
Parity
None
Address / Unit Number
1*
Modbus Parameters
The NHRS uses the following parameters for communication:
*Default, may vary for multi-unit orders.
47 | Modbus Installation
Page 51
Variable Name
Description
Addr
Type
Format
Range
Unit
R/W
Details
CapLimit
Set a manual capacity restriction for the humidifier
40006
Holding Register
Integer
50-100
%
Write
Limits output to percentage of total capacity
RHDem
Write RH or Demand signal value to humidifier
40038
Holding Register
Integer
0-100
%
Write
Requires network controls (NetSensor = 1)
Set
Writes the desired space setpoint when using sensor controls
40024
Holding Register
Integer
30-95
%
Write
Use only when sending RH value to RHDem
NetSensor
Switches between hard wired or network control signal
40039
Holding Register
Integer
0,1 - Write
1 = Use Modbus to write sensor or demand value 0 = Hard wired sensor or wired demand signal
RHDem
Read RH or Demand signal value from humidifier
40008
Input Register
Integer
0-100
%
Read
Used with hardwired or network control signal
Set
Read space setpoint (sensor type controls only)
40024
Input Register
Integer
30-95
%
Read
Sensor controls only, not for demand type controls
CapLimit
Reads the manual capacity restriction for humidifier
40006
Input Register
Integer
50-100
%
Read
Adjust using writeable CapLimit variable
NetSensor
Confirms humidifier control mode
40039
Input Register
Integer
0,1 - Read
1 = Use Modbus to write sensor or demand value 0 = Hard wired sensor or wired demand signal
SysDemand
Read system ouput / demand
40007
Input Register
Integer
0-100
%
Read
Displays output as percentage of capacity
HourOpt
Read operation hours of unit
40009
Input Register
Integer
0-infinity
hrs
Read
Displays cumulative hours since startup
SmallHrs
Read minor maintenance hours remaining
40013
Input Register
Integer
0-6000
hrs
Read
Displays hours until next minor maintenance
LargeHrs
Read major maintenance hours remaining
40015
Input Register
Integer
0-6000
hrs
Read
Displays hours until next major maintenance
Status
Read humidification status
40036
Input Register
Integer
0,1 - Read
0 = Idle / Standby 1 = Active / Humidifying
Service
Read service warning status
40037
Input Register
Integer
0,1 - Read
0 = No Service Warning 1 = Service Required
Fault
Read fault status
40035
Input
Register
Integer
0,1
-
Read
0 = No Fault 1 = Fault Detected
InputType
Read control signal mode
40025
Input
Register
Integer
0,1
-
Read
0 = Demand Signal 1 = RH Sensor Signal ("Transducer Control")
Connection
Read communication status
40015
Input
Register
Integer
0,1
-
Read
0 = Communication Error 1 = Normal Communications
The following points may be mapped for control:
Table 9: NHRS Humidifier Modbus Parameters
Modbus Installation | 48
Page 52
Troubleshooting
Table 10: General Troubleshooting
49 | Modbus Installation
Page 53
Problem
Resolutions
Cannot see/change set point over Modbus.
Check control type. Demand type controls use internal algorithms to generate a signal telling the humidifier to operate at a certain output percentage. These controls do not report the detected humidity level or set point to the humidifier. As a result the set point and space humidity levels cannot be monitored through Modbus when using demand controls.
Sensor ("transducer") type controls report a sensed humidity value to the humidifier. The set point is configured at the humidifier and the humidifier uses internal algorithms to determine the output percentage. Since the humidifier knows both the set point and humidity level, these values may be monitored over the Modbus connection.
Cannot establish communication.
Check communication parameters. Condair humidifiers are capable of Modbus RTU communication. Modbus TCP based systems require a gateway to translate the information.
Check Parity, baud rate, and stop bits. Modifying parity and stop bit parameters may be necessary for some Modbus networks.
Cannot read data from point
Check addresses, some Modbus network controllers automatically prepend the "40" for input registers and "30" for input registers.
Carefully ensure that addresses are mapped correctly. A single incorrect address may cause loss of communication or faults for an entire chain of humidifiers.
Check data type, some Modbus network controllers default to integer or binary values depending on variable type.
Only some registers report data.
Check the baud rate being used on the Modbus network. NH-EL, NHTC, GSTC, SETC, MHTC, and NHRS units only support 9600 bps. MES-2 and RH2 units can support 4800 bps, 9600 bps, or 19200 bps for communications. Use of faster baud rates may cause data loss.
Check the polling rate being used. High polling rates can interrupt responses from the previous poll of data causing incomplete data transfer. A recommended polling rate is once per minute.
Humidifier will not respond to set point/sensor values/ demand values written over Modbus.
Check that humidifier is configured for "Digital" or "Modbus" control. Refer to the "Control Signal Settings" section for your humidifier model. If the setting is "Analog" the humidifier will look for a control signal on the low voltage terminal strip only.
Humidifier will not respond to hardwired controls.
Check that humidifier is configured for "Analog" control. Refer to the "Control Signal Settings" section for your humidifier model. If the setting is "Digital" or "Modbus" the humidifier will look for a control value to be written over Modbus only.
Modbus Installation | 50
Page 54
Intermittent Communications
Check wire type and run length. Wire type should be 18 – 24 AWG, shielded twisted pair wire with 120 ohm characteristic impedance. Chains should not exceed 2000 feet in length.
Look for wire runs in close proximity to equipment generating significant electrical noise (such as VFD's, medical equipment, X-ray machinery, servers, etc).
Check that wire shield is terminated at one end only. Terminations at both ends cause shield to conduct electricity and can generate noise.
Confirm correct polarity of conductors at each device. This problem can be the result of Net+ and Net- terminals being crossed.
Check Modbus addresses for conflicts with any device. Each Modbus device on the network must have a unique address. Devices (humidifiers or otherwise) cannot share Modbus addresses.
Ensure that no more than 8 devices are connected to a single chain/bus. Humidifiers should be of the same type (gas, electric, etc) but do not to be the same size.
Invalid data
Check Modbus addresses for conflicts. Each Modbus device on the network must have a unique address. Devices (humidifiers or otherwise) cannot share Modbus addresses.
More variables or additional information is required from the humidifier.
Contact Condair Technical Services for additional support.
NHTC / GSTC / SETC E-50 Error
MHTC E-35 Error
“Modbus Timeout”
This error is generated in cases where the humidifier is configured for control over the Modbus network and a value is not written without the timeout window. The timeout clock restarts each time a value is written (even if the same value is written repeatedly).
The error is corrected by writing an appropriate value to the RHdem1 address: NH-EL - 40005 NHTC – 40264 GSTC – 40264 SETC – 40264 MHTC – 40053
If it is desired to use hardwired controls instead of network controls, the humidifier must be configured as such. Refer to the Control Signal Setting section for your humidifier found earlier in this manual.
51 | Modbus Installation
Page 55
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. First start by reviewing the contents of Modbus Field retrofit kit, you should have the following items:
1 Ribbon cable 10 pin to 20 pin 1 Translation Printed Circuit board (colour blue) 1 terminal strip (3 pole) with RJ 11 termination cable 4 Nylon Standoffs (white) 4 Nylon screws (white)
Step B – Hardware installation
1 Locate the main PCB board inside the humidifier. 2 Connect one end of the ribbon cable (10 pin end) to the Humidifier’s COM port.
Figure 7: Humidifier COM port
3 Route the ribbon cable through the punch out on the humidifiers front electrical panel
Modbus Installation | 52
Page 56
20 pin connection
Figure 8: Routing of Ribbon Cable
4 Connect the ribbon cable 20 pin side to the Logic Card.
Figure 9: Pin connection for Ribbon cable
53 | Modbus Installation
5 Configured dipswitch settings according to MODE1 printed on card (485<>TTL).
Page 57
Figure 10: Dipswitch settings for Logic Card
6 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. No warranty is made against corrosion, deterioration, or suitability of substituted materials used as a result of compliance with government regulations.
THE COMPANY’s obligations and liabilities under this warranty are limited to furnishing replacement parts to the customer, F.O.B. THE COMPANY’s factory, providing the defective
part(s) is returned freight prepaid by the customer. Parts used for repairs are warranted for the balance of the term of the warranty on the original humidifier or 90 days, whichever is longer.
The warranties set forth herein are in lieu of all other warranties expressed or implied by law. No liability whatsoever shall be attached to THE COMPANY until said products have been paid for in full and then said liability shall be limited to the original purchase price for the product. Any further warranty must be in writing, signed by an officer of THE COMPANY.
THE COMPANY’s limited warranty on accessories, not of the companies manufacture, such as controls, humidistats, pumps, etc. is limited to the warranty of the original equipment manufacturer from date of original shipment of humidifier.
THE COMPANY makes no warranty and assumes no liability unless the equipment is installed in strict accordance with a copy of the catalog and installation manual in effect at the date of purchase and by a contractor approved by THE COMPANY to install such equipment.
THE COMPANY makes no warranty and assumes no liability whatsoever for consequential damage or damage resulting directly from misapplication, incorrect sizing or lack of proper maintenance of the equipment.
THE COMPANY makes no warranty and assumes no liability whatsoever for damage resulting from freezing of the humidifier, supply lines, drain lines, or steam distribution systems.
THE COMPANY retains the right to change the design, specification and performance criteria of its products without notice or obligation.
57 | Modbus Installation
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
Loading...
Buy Points How it Works FAQ Contact Us Questions and Suggestions Privacy Policy Cookie Policy Terms of Use