Your example: [RoomController] HRS12376:20
Wago PLC:
VAR_GLOBAL
test_string [color=#0040FF]AT [/color][color=#BF40FF]%MW88[/color] : [color=#0040FF]STRING(20)[/color]; (Modbus-Adress 12376)
END_VAR
Ignition OPC-UA Modbus-Device:
Reverse String Byte Order = true
Tag setup in the designer:
Datatype=string
[RoomController] HRS12376:20
This should be work.
Gruessle
ch4plus