Compiler error C0044

Message: Assignment to input missing for parameter '<input variable name>' in call of '<function block name>'

Possible error cause: A parameter is passed although an input variable is not declared.

Error correction: Declare an input variable.

Example of the error:

PROGRAM PLC_PRG
VAR
	inst : FB;
END_VAR 
inst(1);


FUNCTION_BLOCK FB
VAR_INPUT

END_VAR


--> C0044: Assignment to input missing for parameter '1' in call of 'FB'

Error correction:

Example:
VAR_INPUT
	in : INT;
END_VAR