ESME M251 BOOL variable in OPC UA and modbus simultaneously

[dnordenberg1]

Hi!

TLDR;

How can I have an BOOL variable that is read/write in both modbus TCP server and from OPC UA at the same time?

Since the OPCUASymbolConfiguration forbids %QX addressed variables being in the list I can not use the build in modbus TCP server which uses %QX for modbus coils. I switched to using FB_ModbusTcpServer instead only to discover it can't use port 502 even when built in modbus TCP server is removed from the interface 😞

But anyway I changed my BOOLs to %MX.n addressing and added my array of BOOLs to the FBs coils pin and went back to the OPCUASymbolConfiguration only to discover that variables that has an %MX address is not allowed either 😞

So how should I do it then? It seems like an impossible combination. Since I want read/write access from both ways I can't just simply make a second variable and assign it the value of another since it would be a one way assignment. I also tried using VAR_CONFIG which then makes the address syntax %Q* or %M* in my main variable list and that fools OPCUASymbolConfiguration to allow it and then I add the complete %MX.n address of it in the VAR_CONFIG list. This semi works, I can toggle the BOOL from modbus but the OPC UA symbol seems to be read only. It displays symbol status but nothing happens when I toogle it 😞

Kind regards

David