Neptronic SKE4 series User manual

SKE4-Modbus Guide-190110
SKE4 Steam Humidifier
Modbus Communication Module User Guide

SKE4 Steam Humidifier
Modbus Communication Module User Guide
www.neptronic.com
Page | 1
Introduction
The SKE4 Modbus Communication Module User Guide provides information for using Neptronic®communication
feature. The controller uses Modbus communication protocol over serial line in the RTU mode and provides a Modbus
network interface between client devices and Neptronic SKE4 devices.
The SKE4 Modbus Guide assumes that you are familiar with Modbus terminology.
The following are the requirements for Modbus:
Data Model. The SKE4 Steam Humidifier Modbus server data model uses only the Modbus Registers table.
Register Address:
oAs per protocol base (base 0); for PLC add 1 to protocol base.
oAs per holding register (base 400001).
Function Codes. The SKE4 Steam Humidifier Modbus server supports a limited function codes subset
comprising:
oRead Holding Registers (0x03)
oWrite Single Register (0x06)
oWrite Multiple Registers (0x10)
Exception Responses. The SKE4 Steam Humidifier Modbus server supports the following exception codes:
oIllegal data address
oIllegal data value
oSlave device busy
Serial Line. The SKE4 Steam Humidifier Modbus over serial line uses RTU transmission mode over a two-wire
configuration RS485 (EIA/TIA-485 standard) physical layer.
oThe physical layer can use fixed baud rate selection or automatic baud rate detection (default) as
per the Modbus Auto Baud Rate device menu item or holding register index 1.
oThe supported baud rates are 9600, 19200, 38400, and 57600.
oThe physical layer also supports variable parity control and stop bit configuration as per the Modbus
Comport Config device menu item or holding register index 2.
oIn auto baud rate configuration, if the device detects only consecutive bad frames (2 or more) for
one second with any given baud rate, it will reinitialize itself to the next baud rate.
Addressing. The SKE4 Steam Humidifier device only answers at the following address:
oThe device's unique address (1 to 246) that can be set through the device menu or through holding
register index 0.

SKE4 Steam Humidifier
Modbus Communication Module User Guide
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Page | 2
Modbus Registers
Table Glossary
Name
Description
Name
Description
W
Writable Register
ASCII
For registers containing ASCII (8-bit) characters
RO
Read Only Register
MSB
Most Significant Byte
Unsigned
For range of values from 0 to 65,535, unless otherwise specified
LSB
Least Significant Byte
Signed
For range of values from -32,768 to 32,767, unless otherwise
specified
MSW
Most Significant Word
Bit String
For registers with multiple values using bit mask (example,
flags)
LSW
Least Significant Word
Modbus Registers Table
Protocol
Base
Holding
Register
Description
Data Type
Units, Limits, State Texts
Writable
Default
Value
0
400001
Modbus Address and Product Type
Unsigned
MSB = Product type, not writable
LSB = Modbus Address (1 to 247), writable
W
1
400002
Device Baud Rate
Unsigned
Scale 100
0, 9600, 19200, 38400, and 57600, 0 = Auto
Baud Rate Detection Value/100 (e.g. 38400 baud
= 384)
W
19200
2
400003
Modbus Slave Communication Port
Configuration
Unsigned
0 = No parity, 2 Stop bits
1 = Even parity, 1 Stop bit
2 = Odd parity, 1 Stop bit
W
No parity,
2 Stops bits
3
400004
Product Name (characters 8 & 7)
ASCII
MSB = char 6, LSB = char 7
W
4
400005
Product Name (characters 6 & 5)
ASCII
MSB = char 4, LSB = char 5
W
5
400006
Product Name (characters 4 & 3)
ASCII
MSB = char 2, LSB = char 3
W
6
400007
Product Name (characters 2 & 1)
ASCII
MSB = char 0, LSB = char 1
W

SKE4 Steam Humidifier
Modbus Communication Module User Guide
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Page | 3
Protocol
Base
Holding
Register
Description
Data Type
Units, Limits, State Texts
Writable
Default
Value
7
400008
Product Actual Firmware Version (in Integer
x100)
Unsigned
Scale 100
1 to 65535 (e.g. 100)
RO
8
400009
Product Actual EEPROM Version (in Integer
x100)
Unsigned
Scale 100
1 to 65535 (e.g. 100)
RO
2000
402001
Control Signal
Unsigned
Scale 1000
0 to 10500
Value x 1000 (e.g. 1V = 1000)
RO
0
2001
402002
Room RH Signal
Unsigned
Scale 1000
0 to 10500
Value x 1000 (e.g. 1V = 1000)
RO
0
2002
402003
Supply RH Signal
Unsigned
Scale 1000
0 to 10500
Value x 1000 (e.g. 1V = 1000)
RO
0
2003
402004
Water Level Signal
Unsigned
Scale 1
0 to 30000
Value x 1 (e.g. 10Hz = 10)
RO
0
2004
402005
Water Level Low Signal
Unsigned
Scale 1000
0 to 10000
Value x 1000 (e.g. 1V = 1000)
RO
0
2005
402006
Water Level High Signal
Unsigned
Scale 1000
0 to 10000
Value x 1000 (e.g. 1V = 1000)
RO
0
2006
402007
Water Temperature Signal
Unsigned
Scale 1000
0 to 10000
Value x 1000 (e.g. 1V = 1000)
RO
0
2007
402008
Foam Signal
Unsigned
Scale 1000
0 to 10000
Value x 1000 (e.g. 1V = 1000)
RO
0
2008
402009
SSR Temperature Signal
Unsigned
Scale 1000
0 to 10000
Value x 1000 (e.g. 1V = 1000)
RO
0
2009
402010
Cabinet Temperature Signal
Unsigned
Scale 1000
0 to 10000
Value x 1000 (e.g. 1V = 1000)
RO
0
2010
402011
Current Sensor 1 Signal
Unsigned
Scale 1000
0 to 3300
Value x 1000 (e.g. 1V = 1000)
RO
0

SKE4 Steam Humidifier
Modbus Communication Module User Guide
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Page | 4
Protocol
Base
Holding
Register
Description
Data Type
Units, Limits, State Texts
Writable
Default
Value
2011
402012
Current Sensor 2 Signal
Unsigned
Scale 1000
0 to 3300
Value x 1000 (e.g. 1V = 1000)
RO
0
2012
402013
Board Temperature Signal
Unsigned
Scale 1000
0 to 10000
Value x 1000 (e.g. 1V = 1000)
RO
0
2013
402014
Main Power Supply
Unsigned
Scale 10
0 to 400
Value x 10 (e.g. 1V = 10)
RO
0
4000
404001
Power Output Feedback Signal
Unsigned
Scale 1000
0 to 10000
Value x 1000 (e.g. 1V = 1000)
RO
0
4001
404002
Heater SSR Stage
Unsigned
Scale 100
0 to 10000
Value x 100 (e.g. 10% = 1000)
RO
0
6000
406001
Control Input
Unsigned
Scale 100
0 to 10000
Value x 100 (e.g. 10% = 1000)
RO
0
6001
406002
Room RH
Unsigned
Scale 100
0 to 10000
Value x 100 (e.g. 10% hum = 1000)
RO
0
6002
406003
Supply High Limit RH
Unsigned
Scale 100
0 to 10000
Value x 100 (e.g. 10% hum = 1000)
RO
0
6003
406004
Water Temperature Signal Min
Unsigned
Scale 1000
0 to 10000
Value x 1000 (e.g. 10V = 10000)
RO
0
6004
406005
Water Temperature Signal Max
Unsigned
Scale 1000
0 to 10000
Value x 1000 (e.g. 10V = 10000)
RO
3000
6005
406006
Water Temperature
Unsigned
Scale 100
0 to 12500
Value x 100 (e.g. 10C = 1000)
RO
5000
6006
406007
Water Temperature Min
Unsigned
Scale 100
0 to 25000
Value x 100 (e.g. 10C = 1000)
RO
0
6007
406008
Water Temperature Max
Unsigned
Scale 100
0 to 25000
Value x 100 (e.g. 10C = 1000)
RO
12500

SKE4 Steam Humidifier
Modbus Communication Module User Guide
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Page | 5
Protocol
Base
Holding
Register
Description
Data Type
Units, Limits, State Texts
Writable
Default
Value
6008
406009
Water Temperature Bias
Signed
Scale 100
-1000 to 1000
Value x 100 (e.g. 10C = 1000)
RO
0
6009
406010
SSR Temperature
Signed
Scale 100
-2000 to 10000
Value x 100 (e.g. 10C = 1000)
RO
0
6010
406011
Cabinet Temperature
Signed
Scale 100
-200 to 1000
Value x 100 (e.g. 1C = 100)
RO
0
6011
406012
Current Sensor 1 (0)
Unsigned
Scale 100
0 to 15000
Value x 100 (e.g. 10A = 1000)
RO
0
6012
406013
Current Sensor 1 (1)
0 to 15000
6013
406014
Current Sensor 2 (0)
Unsigned
Scale 100
0 to 15000
Value x 100 (e.g. 10A = 1000)
RO
0
6014
406015
Current Sensor 2 (1)
0 to 15000
6015
406016
Board Temperature
Unsigned
Scale 100
0 to 10000
Value x 100 (e.g. 10C = 1000)
RO
0
6016
406017
Power Output Feedback
Unsigned
Scale 100
0 to 10000
Value x 100 (e.g. 10% = 1000)
RO
0
6017
406018
Water Level
Unsigned
Scale 10
0 to 2000
Value x 10 (e.g. 10% = 100)
RO
780
6018
406019
Water Probe Low Pos Reading
Unsigned
Scale 1
0 to 30000
Value x 1 (e.g. 1 Hz = 1)
RO
30000
6019
406020
Water Probe High Pos Reading
Unsigned
Scale 1
0 to 30000
Value x 1 (e.g. 1 Hz = 1)
RO
30000
6020
406021
Water Probe Abs Low Pos Reading
Unsigned
Scale 1
0 to 30000
Value x 1 (e.g. 1 Hz = 1)
RO
30000
6021
406022
Water Probe Abs High Pos Reading
Unsigned
Scale 1
0 to 30000
Value x 1 (e.g. 1 Hz = 1)
RO
30000

SKE4 Steam Humidifier
Modbus Communication Module User Guide
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Page | 6
Protocol
Base
Holding
Register
Description
Data Type
Units, Limits, State Texts
Writable
Default
Value
6022
406023
Room RH Network Reading
Unsigned
Scale 100
0 to 10000
Value x 100 (e.g. 10% hum = 1000)
RO
0
6023
406024
Room RH Setpoint
Unsigned
Scale 100
0 to 10000
Value x 100 (e.g. 10% hum = 1000)
W
4000
6024
406025
Room RH Unoccupied Setpoint
Unsigned
Scale 100
0 to 10000
Value x 100 (e.g. 10% hum = 1000)
W
3000
6025
406026
Room RH Vacant Setpoint
Unsigned
Scale 100
0 to 10000
Value x 100 (e.g. 10% hum = 1000)
W
2000
6026
406027
Room Demand
Unsigned
Scale 100
0 to 10000
Value x 100 (e.g. 10% = 1000)
RO
0
6027
406028
Supply High Limit Network Reading
Unsigned
Scale 100
0 to 10000
Value x 100 (e.g. 10% hum = 1000)
W
0
6028
406029
Supply High Limit Setpoint
Unsigned
Scale 100
0 to 10000
Value x 100 (e.g. 10% hum = 1000)
W
8000
6029
406030
Supply High Limit Demand
Unsigned
Scale 100
0 to 10000
Value x 100 (e.g. 10% = 1000)
RO
0
6030
406031
Humidity Control Network Demand
Unsigned
Scale 100
0 to 10000
Value x 100 (e.g. 10% = 1000)
W
0
6031
406032
Humidity Control Network High Limit
Unsigned
Scale 100
0 to 10000
Value x 100 (e.g. 10% = 1000)
W
10000
6032
406033
Humidity Demand
Unsigned
Scale 100
0 to 10000
Value x 100 (e.g. 10% = 1000)
RO
0
6033
406034
SDU Fan Off Delay
Unsigned
Scale 1
5 to 20
Value x 1 (e.g. 5min = 5)
W
5
6034
406035
Humidity Demand Low Dead Band (0)
Unsigned
Scale 100
0 to 10000
Value x 100 (e.g. 10% = 1000)
W
100
6035
406036
Humidity Demand Low Dead Band (1)
0 to 10000
Value x 100 (e.g. 10% = 1000)

SKE4 Steam Humidifier
Modbus Communication Module User Guide
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Page | 7
Protocol
Base
Holding
Register
Description
Data Type
Units, Limits, State Texts
Writable
Default
Value
6036
406037
Control Network Timeout (0)
Unsigned
Scale 1
1 to 15
Value x 1 (e.g. 5min = 5)
W
15
6037
406038
Control Network Timeout (1)
1 to 15
Value x 1 (e.g. 5min = 5)
6038
406039
System Power Output
Unsigned
Scale 100
0 to 10000
Value x 100 (e.g. 10% = 1000)
RO
0
6039
406040
System Steam Capacity
Unsigned
Scale 10
0 to 30000
Value x 10 (e.g 10 kg/h = 100)
RO
0
6040
406041
Boiler Demand
Unsigned
Scale 100
0 to 10000
Value x 100 (e.g. 10% = 1000)
W
0
6041
406042
Boiler Capacity
Unsigned
Scale 10
0 to 30000
Value x 10 (e.g. 10kg/hr = 100)
RO
160
6042
406043
Boiler Power Output
Unsigned
Scale 100
0 to 10000
Value x 100 (e.g. 10% = 1000)
RO
0
6043
406044
Boiler Run Time (0)
Unsigned
Scale 100
0 to 2147483647
Value x 100 (e.g. 10h = 1000)
RO
0
6044
406045
Boiler Run Time (1)
0 to 2147483647
6045
406046
Boiler Run Time (2)
0 to 2147483647
6046
406047
Boiler Run Time (3)
0 to 2147483647
6047
406048
Boiler On Time (0)
Unsigned
Scale 100
0 to 2147483647
Value x 100 (e.g. 10h = 1000)
RO
0
6048
406049
Boiler On Time (1)
0 to 2147483647
6049
406050
Boiler On Time (2)
0 to 2147483647
6050
406051
Boiler On Time (3)
0 to 2147483647
6051
406052
Boiler Service Run Time (0)
Unsigned
Scale 100
0 to 2147483647
Value x 100 (e.g. 10h = 1000)
RO
0

SKE4 Steam Humidifier
Modbus Communication Module User Guide
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Page | 8
Protocol
Base
Holding
Register
Description
Data Type
Units, Limits, State Texts
Writable
Default
Value
6052
406053
Boiler Service Run Time (1)
0 to 2147483647
6053
406054
Boiler Service Run Time (2)
0 to 2147483647
6054
406055
Boiler Service Run Time (3)
0 to 2147483647
6055
406056
Boiler Service On Time (0)
Unsigned
Scale 100
0 to 2147483647
Value x 100 (e.g. 10h = 1000)
RO
0
6056
406057
Boiler Service On Time (1)
0 to 2147483647
6057
406058
Boiler Service On Time (2)
0 to 2147483647
6058
406059
Boiler Service On Time (3)
0 to 2147483647
6059
406060
Boiler Minimum Steam Output
Unsigned
Scale 1
1 to 25
Value x 1 (e.g. 1% = 1)
W
5
6060
406061
Boiler Drain Interval
Unsigned
Scale 1
0 to 24
Value x 1 (e.g. 1h = 1)
W
6
6061
406062
Boiler Drain Volume
Unsigned
Scale 1
25 to 100
Value x 1 (e.g. 1% = 1)
W
100
6062
406063
Boiler Max Steam Output
Unsigned
Scale 1
0 to 100
Value x 1 (e.g. 1% = 1)
W
100
6063
406064
Boiler Idle Time Drain
Unsigned
Scale 1
0 to 72
Value x 1 (e.g. 1h = 1)
W
24
6064
406065
Boiler Idle Temperature Setpoint
Unsigned
Scale 1
0 to 60
Value x 1 (e.g. 1°C = 1)
W
0
6065
406066
Boiler Blowdown Rate
Unsigned
Scale 1
0 to 100
Value x 1 (e.g. 1% = 1)
W
0
6066
406067
Boiler Service Interval
Unsigned
Scale 1
1000 to 3000
Value x 1 (e.g. 1h = 1)
W
1000

SKE4 Steam Humidifier
Modbus Communication Module User Guide
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Page | 9
Protocol
Base
Holding
Register
Description
Data Type
Units, Limits, State Texts
Writable
Default
Value
6067
406068
Boiler Idle Tank Rinse Interval
Unsigned
Scale 1
1 to 7
Value x 1 (e.g. 1 day = 1)
W
3
6068
406069
Boiler Anti-Freeze Drain (0)
Signed
Scale 100
-4000 to 10000
Value x 100 (e.g. 1C = 100)
RO
100
6069
406070
Boiler Anti-Freeze Drain (1)
-4000 to 10000
Value x 100 (e.g. 1C = 100)
6070
406071
Boiler Anti-Freeze Keep Warm Setpoint (0)
Signed
Scale 100
-4000 to 10000
Value x 100 (e.g. 1C = 100)
RO
3000
6071
406072
Boiler Anti-Freeze Keep Warm Setpoint (1)
-4000 to 10000
Value x 100 (e.g. 1C = 100)
6072
406073
Boiler Anti-Freeze Keep Warm (0)
Signed
Scale 100
-4000 to 10000
Value x 100 (e.g. 1C = 100)
RO
1000
6073
406074
Boiler Anti-Freeze Keep Warm (1)
-4000 to 10000
Value x 100 (e.g. 1C = 100)
6074
406075
HRL Temperature
Signed
Scale 100
-4000 to 26000
Value x 100 (e.g. 1C = 100)
RO
0
6075
406076
HRL Humidity
Unsigned
Scale 100
0 to 10000
Value x 100 (e.g. 1% =100)
RO
0
10000
410001
Air Flow
Unsigned
Scale 1
0 = Closed
1 = Open
RO
Closed
10001
410002
Supply High Limit
Unsigned
Scale 1
0 = Closed
1 = Open
RO
Closed
10002
410003
Interlock
Unsigned
Scale 1
0 = Closed
1 = Open
RO
Closed
10003
410004
Binary External Demand
Unsigned
Scale 1
0 = 0%
1 = 100%
RO
0%
10004
410005
Water Leak Detection
Unsigned
Scale 1
0 = Ok
1 = Leak
RO
Ok

SKE4 Steam Humidifier
Modbus Communication Module User Guide
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Page | 10
Protocol
Base
Holding
Register
Description
Data Type
Units, Limits, State Texts
Writable
Default
Value
10005
410006
Thermal Cutout
Unsigned
Scale 1
0 = Closed
1 = Open
RO
Closed
10006
410007
RS485 Interface
Unsigned
Scale 1
0 = No
1 = Yes
RO
No
10007
410008
Ethernet Interface
Unsigned
Scale 1
0 = No
1 = Yes
RO
No
10008
410009
Contactors PCB Fuse
Unsigned
Scale 1
0 = Normal
1 = Blown Fuse
RO
Normal
10009
410010
Control PCB Fuse
Unsigned
Scale 1
0 = Normal
1 = Open Fuse
RO
Normal
11000
411001
Alarm Warning Relay
Unsigned
Scale 1
0 = Off
1 = On
RO
Off
11001
411002
Service Warning Relay
Unsigned
Scale 1
0 = Off
1 = On
RO
Off
11002
411003
Water Level Valve
Unsigned
Scale 1
0 = Off
1 = On
RO
Off
11003
411004
Tank Water Valve
Unsigned
Scale 1
0 = Off
1 = On
RO
Off
11004
411005
Drain Cooler Valve
Unsigned
Scale 1
0 = Off
1 = On
RO
Off
11005
411006
Drain Pump
Unsigned
Scale 1
0 = Off
1 = On
RO
Off
11006
411007
Drain Valve
Unsigned
Scale 1
0 = Off
1 = On
RO
Off
11007
411008
Main Contactor
Unsigned
Scale 1
0 = Off
1 = On
RO
Off

SKE4 Steam Humidifier
Modbus Communication Module User Guide
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Page | 11
Protocol
Base
Holding
Register
Description
Data Type
Units, Limits, State Texts
Writable
Default
Value
11008
411009
Heater Stage 1
Unsigned
Scale 1
0 = Off
1 = On
RO
Off
11009
411010
Heater Stage2
Unsigned
Scale 1
0 = Off
1 = On
RO
Off
11010
411011
Heater Stage 3
Unsigned
Scale 1
0 = Off
1 = On
RO
Off
11011
411012
SDU Fan
Unsigned
Scale 1
0 = Off
1 = On
RO
Off
11012
411013
Alarm LED
Unsigned
Scale 1
0 = Off
1 = On
RO
Off
11013
411014
Power LED
Unsigned
Scale 1
0 = Off
1 = On
RO
Off
11014
411015
Buzzer
Unsigned
Scale 1
0 = Off
1 = On
RO
Off
12000
412001
System Production Test Done
Unsigned
Scale 1
0 = Inactive
1 = Active
RO
Inactive
12001
412002
Network Control State
Unsigned
Scale 1
0 = Normal
1 = Fault
W
Normal
12002
412003
Water Level Low
Unsigned
Scale 1
0 = Inactive
1 = Active
RO
Inactive
12003
412004
Water Level High
Unsigned
Scale 1
0 = Inactive
1 = Active
RO
Inactive
12004
412005
Foam Sensor
Unsigned
Scale 1
0 = NoFoam
1 = Foam
RO
NoFoam
12005
412006
SDU Fan Fault
Unsigned
Scale 1
0 = Off
1 = On
RO
Off

SKE4 Steam Humidifier
Modbus Communication Module User Guide
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Page | 12
Protocol
Base
Holding
Register
Description
Data Type
Units, Limits, State Texts
Writable
Default
Value
12006
412007
Boiler Service Operation
Unsigned
Scale 1
0 = Not Allowed
1 = Allowed
W
Allowed
12007
412008
Boiler Service Due
Unsigned
Scale 1
0 = Off
1 = On
RO
Off
12008
412009
Boiler Foam State
Unsigned
Scale 1
0 = NotFoaming
1 = Foaming
RO
NotFoaming
12009
412010
HRL Lock Setpoint
Unsigned
Scale 1
0 = Unlock
1 = Lock
W
Unlock
15000
415001
System Log Verbose Level
Unsigned
Scale 1
0 = None
1 = Emergency
2 = Alert
3 = Critical
4 = Error
5 = Warning
6 = Notice
7 = Info
8 = Debug
W
Debug
15001
415002
Modbus Server Units
Unsigned
Scale 1
0 = Metric
1 = Imperial
W
Metric
15002
415003
Control Profile
Unsigned
Scale 1
0 = ExternAnalog
1 = ExternNetwork
2 = InternAnalog
3 = InternNetwork
4 = HRL
5 = Custom
W
ExternAnalog
15003
415004
Modulating High Limit Profile
Unsigned
Scale 1
0 = Disabled
1 = ExternAnalog
2 = ExternNetwork
3 = InternAnalog
4 = InternNetwork
5 = Custom
W
Disabled
15004
415005
Occupancy State
Unsigned
Scale 1
0 = Occupied
1 = Unoccupied
2 = Vacant
3 = Off
RO
Occupied
15005
415006
Room RH Source
Unsigned
Scale 1
0 = None
1 = RoomRH
2 = Network
W
None
15006
415007
Room RH Setpoint Source
Unsigned
Scale 1
0 = None
1 = Internal
2 = ControlInput
W
None

SKE4 Steam Humidifier
Modbus Communication Module User Guide
www.neptronic.com
Page | 13
Protocol
Base
Holding
Register
Description
Data Type
Units, Limits, State Texts
Writable
Default
Value
15007
415008
Supply High Limit Reading Source
Unsigned
Scale 1
0 = None
1 = SuppyHLRH
2 = Network
W
None
15008
415009
Supply High Limit Setpoint Source
Unsigned
Scale 1
0 = None
1 = Internal
2 = ControlInput
W
None
15009
415010
Humidity Control Demand Source
Unsigned
Scale 1
0 = None
1 = ControlInput
2 = RoomDemand
3 = Network
W
ControlInput
15010
415011
Humidity Control High Limit Source
Unsigned
Scale 1
0 = None
1 = ControlInput
2 = SupplyHLDemand
3 = Network
W
None
15011
415012
Humidity Control Cutout State
Unsigned
Scale 1
0 = Off
1 = Normal
2 = LowLimit
3 = HighLimit
4 = NoAirFlow
5 = Interlock
RO
Off
15012
415013
SDU Fan Target
Unsigned
Scale 1
0 = None
1 = SDUFan
W
None
15013
415014
Boiler Power State
Unsigned
Scale 1
0 = Off
1 = On
RO
Off
15014
415015
Boiler Request
Unsigned
Scale 1
0 = None
1 = Reset Alarms
2 = Drain
3 = Reset Counters
4 = Filling
5 = WaterCalib
W
None
15015
415016
Boiler State
Unsigned
Scale 1
0 = Off
1 = Idle
2 = LineRinse
3 = TankRinse
4 = Filling
5 = Draining
6 = Heating
7 = Boiling
8 = Alarm
RO
Off
15016
415017
Boiler Fill Mode
Unsigned
Scale 1
0 = OneShot
1 = Pulsed
W
Pulsed
15017
415018
Boiler Alarm
Unsigned
Scale 1
0 = Normal
1 = FailedPump
2 = FillTimeout
3 = BlockedPiping
4 = HeatTimeout
5 = Overheat
6 = WaterLeak
7 = Service
8 = Foaming
RO
Normal

SKE4 Steam Humidifier
Modbus Communication Module User Guide
www.neptronic.com
Page | 14
Protocol
Base
Holding
Register
Description
Data Type
Units, Limits, State Texts
Writable
Default
Value
15018
415019
Boiler Idle Tank Rinse On
Unsigned
Scale 1
0 = Off
1 = On
W
Off
15019
415020
Boiler Idle Tank Rinse Off
Unsigned
Scale 1
0 = Off
1 = On
W
Off
15020
415021
Water Probe Auto Calib.
Unsigned
Scale 1
0 = None
1 = Once
2 = Always
W
Always
15021
415022
Boiler Startup Tank Rinse
Unsigned
Scale 1
0 = Off
1 = On
W
Off

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