Message: No external access to 'VAR_IN_OUT' parameter '<parameter name>' of '<object name>'
Possible error cause: An attempt is made to remotely access a 'VAR_IN_OUT' parameter.
Error correction: Do not remotely access 'VAR_IN_OUT' parameters.
Example of the error:
PROGRAM PLC_PRG VAR inst : FB; i : INT; END_VAR i := inst.in_out; FUNCTION_BLOCK FB VAR_IN_OUT in_out : INT; END_VAR --> C0178: No external access to 'VAR_IN_OUT' parameter 'in_out' of 'FB'