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Modbus Installation

Modbus Parameters

The MHTC uses the following parameters for communication:

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*

*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

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

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Содержание Modbus RTU

Страница 1: ...on Manual Using Modbus with Condair Humidifiers Includes installation operation maintenance and troubleshooting information 2560599 F 15 June 2018 Important Read and save these instructions This guide to be left with equipment owner ...

Страница 2: ...horization 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 ...

Страница 3: ...ommunications 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 ...

Страница 4: ...f humidity equipment installed by unqualified personnel or the use of parts components equipment that are not authorized or approved by Condair Group AG CAUTION Electrical All electrical work should be done according to local and national electrical code Electrical connection to be performed by a licensed electrician CAUTION Installation Do not mount on hot surfaces Do not mount in area where free...

Страница 5: ...art 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 Please consult y...

Страница 6: ...art 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...

Страница 7: ... 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 Figure 2 EL NH EL Modbus 3 Pole Plug Location ...

Страница 8: ... 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...

Страница 9: ...Modbus Installation 6 Figure 3 EL NH EL Modbus Wiring Diagram ...

Страница 10: ...7 Modbus Installation Figure 4 TC Modbus Wiring Diagram ...

Страница 11: ...Modbus Installation 8 Figure 5 MES2 and RH2 Modbus Wiring Diagram ...

Страница 12: ...9 Modbus Installation Figure 6 NHRS Modbus Wiring Diagram ...

Страница 13: ...or 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 ...

Страница 14: ... 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 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 p...

Страница 15: ... 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 lim...

Страница 16: ...g 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 Re...

Страница 17: ...l 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...

Страница 18: ...ying 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...

Страница 19: ...ms 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 th...

Страница 20: ...a sensor value and proportional integral control band Control Channels Single Use a signal channel control signal Dual Use a dual channel control signal 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 ...

Страница 21: ...or cylinder A NH EL 150 and NH EL 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 NH EL 200 models only BMS_ Timeout BMS timeout for Modbus and BACnet 40013 Holding Register Integer 0 300 s Write It is recommend to not c...

Страница 22: ...ays channel 1 demand sensed RH as a percentage of cylinder capacity for cylinder B NH EL 150 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 EL 150 and NH EL 200 models only Blower_Pac k_A Reads the status of the blower pack for cylinder A 3...

Страница 23: ... 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 ...

Страница 24: ...re 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 le...

Страница 25: ...ol 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 Note Refer to the C...

Страница 26: ... EIA 485 Transmission Mode RTU Baud Rate 9600 Data Bits 8 Stop Bits 1 Parity Even Address Unit Number 1 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 ...

Страница 27: ...dent 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 NHTC 200 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 ...

Страница 28: ...isplays 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 NHTC 200 models only Ch2DemCyl1 Displays channel 2 demand for cylinder 1 30349 Input Register Integer 0 100 Read Displays channel 2 d...

Страница 29: ... 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 de...

Страница 30: ...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 summ...

Страница 31: ...relevant when writing control signal through modbus 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 Singl...

Страница 32: ...Control 3 RH Sensor Value Use Proportional Integral 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 si...

Страница 33: ...nalog 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...

Страница 34: ...ow 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 ...

Страница 35: ... 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 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 procedur...

Страница 36: ... 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 va...

Страница 37: ...nable 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 se...

Страница 38: ...ed 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 None...

Страница 39: ...ings can be adjusted 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 Note Refer to the MHTC Humidifier Configura...

Страница 40: ...midifier 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 Regi...

Страница 41: ...ad 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 hour...

Страница 42: ...ontrol 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 Jumper Position Function J26 Removed Terminal strip control J26 Installed Modbus control MES2 and RH2 Electrode Steam OEM Humidifiers The MES2 and RH2 both use the following par...

Страница 43: ...Modbus Installation 40 The following points may be mapped for control ...

Страница 44: ...41 Modbus Installation Table 8 MES2 and RH2 Humidifier Modbus Parameters ...

Страница 45: ...e 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 wi...

Страница 46: ... 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 ...

Страница 47: ...us 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 Displa...

Страница 48: ... 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 ...

Страница 49: ...arized 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 ...

Страница 50: ...bus Parameters The NHRS uses the following parameters for communication Signaling Type EIA 485 Transmission Mode RTU Baud Rate 9600 Data Bits 8 Stop Bits 1 Parity None Address Unit Number 1 Default may vary for multi unit orders ...

Страница 51: ...umidifier 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...

Страница 52: ...49 Modbus Installation Troubleshooting Table 10 General Troubleshooting ...

Страница 53: ...t 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 NH...

Страница 54: ...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 addition...

Страница 55: ...wing 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 Humi...

Страница 56: ... 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 5 Configured dipswitch settings according to MODE1 printed on card 485 TTL 20 pin connection ...

Страница 57: ...witch 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 ...

Страница 58: ...55 Modbus Installation 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 ...

Страница 59: ...Modbus Installation 56 Figure 13 Low voltage terminal strip on NHRS Humidifier ...

Страница 60: ...tsoever 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 ...

Страница 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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