HygroMatik FlexLine
Steam humidifier for air handling units and steam baths, with remote setpoints and fault codes.
The HygroMatik FlexLine is a steam humidifier that produces steam with electrode or heater cylinders for air handling units, process rooms and steam baths. This Modbus RTU template reads steam output, humidity, temperature, states and fault messages, and lets you set humidity and temperature setpoints, ECO mode and steam on or off from ModbusCloud.
- Protocol
- Modbus RTU
- Connection
- RS485, 19200 baud
- Registers
- 49, read and write
- Brand
- HygroMatik
- Key readings
- Steam output · Relative humidity · Temperature · Demand · Cylinder current · Water level · Unit state · Fault message
- Available commands
- Humidity setpoint · Temperature setpoint · ECO mode · Steam on or off · Maximum steam output · Demand via Modbus
- Compatible models
- FlexLine electrode steam humidifier (FLE) · FlexLine heater steam humidifier (FLH) · FlexLine FLE · FlexLine FLH · FlexLine Spa
- Last updated
Registers (49)
49 read, 21 write
| Name | Unit | Access | Address (Hidden until you enter your email) | Function (hidden) | Type (hidden) |
|---|---|---|---|---|---|
| Steam Output Unit | kg/h | Read | |||
| Steam Output Cylinder 1 | kg/h | Read | |||
| Steam Output Cylinder 2 | kg/h | Read | |||
| Humidity Actual Value | % | Read | |||
| Humidity Actual Max | % | Read | |||
| Humidity Setpoint Active | % | Read | |||
| Humidity Set Max | % | Read | |||
| Temperature Actual Value | °C | Read | |||
| Temperature Setpoint Active | °C | Read | |||
| Temperature Actual Value 1 | °C | Read | |||
| Temperature Actual Value 2 | °C | Read | |||
| Demand | % | Read | |||
| Demand PI | % | Read | |||
| Demand SPA | % | Read | |||
| Control Signal Internal | % | Read | |||
| Current Cylinder 1 | A | Read | |||
| Current Cylinder 2 | A | Read | |||
| Water Level Cylinder 1 | mm | Read | |||
| Water Level Cylinder 2 | mm | Read | |||
| Safety Interlock | Read | ||||
| Status Unit | Read | ||||
| Fault Message Unit | Read | ||||
| Status Cylinder 1 | Read | ||||
| Fault Message Cylinder 1 | Read | ||||
| Service Message Cylinder 1 | Read | ||||
| Status Cylinder 2 | Read | ||||
| Fault Message Cylinder 2 | Read | ||||
| Service Message Cylinder 2 | Read | ||||
| Demand Via Modbus | % | Read and write | |||
| Modbus Counter | s | Read and write | |||
| Safety Interlock Virtual | Read and write | ||||
| ECO Mode | Read and write | ||||
| Humidity Setpoint | % | Read and write | |||
| Dehumidification Setpoint Delta | % | Read and write | |||
| Humidity ECO Delta | % | Read and write | |||
| Humidity PI Gain | % | Read and write | |||
| Humidity PI Integral | % | Read and write | |||
| Temperature Setpoint | °C | Read and write | |||
| Temperature Steam Off Delta | °C | Read and write | |||
| Temperature ECO Delta | °C | Read and write | |||
| Temperature Max Delta | °C | Read and write | |||
| Temperature PI Gain | % | Read and write | |||
| Temperature PI Integral | % | Read and write | |||
| Steam Output Max | % | Read and write | |||
| Light 1 | Read and write | ||||
| Light 2 | Read and write | ||||
| Light 3 | Read and write | ||||
| Light 4 | Read and write | ||||
| Modbus Timeout | s | Read and write |
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If a device is not in the library yet, we build the template for free as soon as we have the register data.
Use cases
- Show actual humidity, setpoint and steam output of each humidifier on a dashboard per air handling unit.
- Send an email when Fault Message Unit is not 0, with the fault shown as text.
- Alert on a service message such as electrode or pump warning before the cylinder needs replacing.
- Keep a 365-day history of humidity and steam output to show that a process room stayed in range.
- Raise or lower the humidity setpoint remotely when the use of a room changes.
Installation
With the board switched off, plug the RS485 interface option onto the FlexLine main board and fix it with the locking post.
Wire the 3-pole plug to the RS485 bus of the ModbusCloud Gateway. Set jumper X3 on the units at both ends of the line, and X2 and X4 on one unit only.
Check address, baud rate, parity and stop bits in the unit control. Factory settings are address 1, 19200 baud, no parity, 1 stop bit.
In ModbusCloud, add a Modbus device with the same settings and import the HygroMatik FlexLine template.
Check that Status Unit shows a plain state such as Humidification or No demand and that Humidity Actual Value matches the display.
Things to watch for
The humidifier does not answer. What should I check?
Check that the RS485 interface option is fitted on the main board and fully seated. Then compare address, baud rate and parity with the Modbus device in ModbusCloud; the factory setting is 19200 baud without parity. Swap A and B if needed, and check that termination jumper X3 is set only at the two ends of the line.
Steam production stops when I control demand over Modbus.
With Control_settings on Modbus, the demand must be rewritten cyclically together with Modbus Counter set to 0. If the counter passes the Modbus Timeout (factory 20 s), steam stops on purpose. ModbusCloud is not meant for this fast refresh; keep the demand on the analog input or internal controller, or let the building management system write it.
The cylinder current looks ten times too high.
The cylinder current registers have no clear scale factor: cylinder 1 is listed with factor 1 and cylinder 2 with factor 10 for the same range. The template uses scale 1 for both. Compare the value with the display and change the scale in ModbusCloud if needed.
What happens when I write to the humidifier?
Setpoints, ECO offsets and PI settings take effect immediately and change the humidity in the room. Writing 0 to Safety Interlock Virtual switches steam production off until you write 1. Agree on values with whoever maintains the air handling unit before you change them.
Want to see how it works?
