Write a Digital Tag to PLC M340 via Modbus TCP

Hello everyone,

I want to write a single bit variable in a M340 PLC. I have declared a Digital variable inside Citect Application with address %MW50.1.

I can read the variable value if a force from the PLC, but I cannot write the value from the SCADA.

The syntax "variable_name" = 1 or "variable_name" = true doesn't work. (for analog values it works)