PLC Programming

Appendix J: Compiler Errors and Warnings
4303
4320
4321
4330
4331
4332
4333
4334
4335
"'' is no operator"
Replace '' by a valid operator.
"Non-boolean expression '' used with contact"
The switch signal for a contact must be a boolean expression.
"Non-boolean expression '' used with coil"
The output variable of a coil must be of type BOOL.
"Expression expected at input 'EN' of the box '' "
Assign an input or an expression to the input EN of POU '’.
"Expression expected at input '' of the box '' "
The input of the operator POU is not assigned.
Expression expected at input '' of the box ''"
The input of the POU is of type VAR_IN_OUT and is not assigned.
"Identifier in jump expected"
The given jump mark is not a valid identifier.
"Expression expected at the input of jump"
Assign a boolean expression to the input of the jump. If this is TRUE, the jump will be executed.
"Expression expected at the input of the return"
Assign a boolean expression to the input of the RETURN instruction. If this is TRUE, the jump will be
executed.
4336
"Expression expected at the input of the output"
Assign a suitable expression to the output box.
4337
"Identifier for input expected"
nsert a valid expression or identifier in the input box.
4338
"Box '' has no inputs"
CoDeSys V2.3 10-125