Operator: NE The IEC operator compares two operands for inequality. All elementary data types are permitted as data types for the operands. If the operands are unequal, then the operator yields the re

Operator: __ISVALIDREF The operator is an extension of the IEC 61131-3 standard. The operator is used for checking whether a reference refers to a valid value. For a description of use and an example,

Compiler Error C0178 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.

Compiler Error C0179 Message : '<identifier>' is no output of 'Function block' Possible error cause : The initialization of a function block instance must not contain VAR_IN_OUT variables. Error corre

Compiler Error C0182 Message : Return type is only possible for POUs of Type FUNCTION and METHOD Possible error cause : An attempt is made to define a return value in a program. Error correction : Def

Compiler Error C0183 Message : Global scope operation '.' is not valid on expression '<expression>' Possible error cause : The '.' operator is used to access a global variable. However, at this locati

Compiler Error C0188 Message : Device not installed to the system. No code generation possible. Possible error cause : The desired device is not installed. Error correction : Install the missing devic

Compiler Error C0189 Message : ';' expected instead of '<token>' Possible error cause : Syntax error Error correction : Make sure that the syntax is correct. Example 395 . Example of the error: PROGRA

Compiler Error C0190 Message : ';' expected instead of end of POU Possible error cause : Syntax error in the POU Error correction : Make sure that the syntax is correct. Example 396 . Example of the e

Compiler Error C0191 Message : The operator 'INDEXOF' is no longer supported. Use ADR instead. ADR on a POU-Name returns a Pointer to a Pointer to the function code. Possible error cause : The outdate