EvoControl Pro series
Models: EvoDry 30 Pro – 180 Pro
6.8 ModBus
Modbus via TCP/IP (RJ45), std. port 502.
In the parameter list there is a column “ModBus” which tells you which register the parameter belongs to (3 or 4) and whether the parameter is available to ModBus.
- 3 = Input register (Read).
- 4 = Holding register (Read / Write).
Address = Parameter id +1 (Ex. id 1000 => address 1001).
Values are normally sent as int16.
Some parameters with larger numbers (int32) utilise the next higher parameter id number as high number, marked with “ModBus” in the parameter list.
Values with decimal places are shown as the value*10 (1 decimal place), marked with “Decimal” in the parameter list (e.g. Process Air Temperature, ID 1120 sends a value of 210 for 21.0°C).
| Id | Text | ModBus | Level | Min | Max | Text values / ModBus | Factory value | Unit |
|---|---|---|---|---|---|---|---|---|
| 1120 | Process air | 3 | 0 | -50 | 150 | Decimal number | 0 | °C |
The function codes are defined on modbus.org.
EvoControl can use the following function codes:
| Function code | Description of the programme |
|---|---|
| 4 | Read Input Registers |
| 3 | Read Multiple Holding Registers |
| 6 | Write Single Holding Register |
See the list of parameters here.
New parameter Id for “Time clock” (Id 8000->) and “Alarm / Alarm history” (Id 9000->) from 2024-10-07.
Blocks of parameters cannot be read out if any parameter in the block is missing!
Troubleshooting:
Check that the network is up and running and you have an IP address in the unit.
Try pinging the unit and see if you get a response.
Try one parameter at a time, e.g. Relative Humidity, ID 1111.
Try reducing the intervals between each reading.
Only one connection (socket)!
If there is no communication with EvoControl within about two minutes, the connection is closed and the ModBus is reinitialised to establish a new connection.
Ominitisation also occurs if connection is broken incorrectly.