Variable: VAR_STAT This functionality is an extension of the IEC 61131-3 standard. You declare static variables locally between the keywords VAR_STAT and END_VAR . Static variables are initialized on

Variable: VAR_EXTERNAL External variables are global variables that are "imported" into a POU. You declare these variables between the keywords VAR_EXTERNAL and END_VAR . If the global variable does n

Variable: VAR_INST The VAR_INST instance variables are allowed only in methods. This kind of variable can be accessed only within the method. You can monitor the variable values of instance variables

Variable: VAR_CONFIG Configuration variables assign the full address to variables which are declared in function blocks with incomplete address information and that should be mapped to device I/Os. Th

Variable: CONSTANT Constant variables are declared in global variable lists or in the declaration part of programming objects. In implementations, constant variables can be accessed as read-only via t

Variable: PERSISTENT Persistent variables are declared in the declaration section VAR_GLOBAL RETAIN PERSISTENT in the persistent global variable list. For variables that are marked with the PERSISTENT

Variable: RETAIN Retain variables are declared by the keyword RETAIN is added in programming objects in the scope VAR , VAR_INPUT , VAR_OUTPUT , VAR_IN_OUT , VAR_STAT , or VAR_GLOBAL . Syntax for the

Pointer: SUPER The SUPER pointer is a special variable which is used for object-oriented programming. SUPER is the pointer of a function block to the base function block instance from which the functi

Pointer: THIS The THIS pointer is a special variable which is used for object-oriented programming. THIS is the pointer of a function block to its own function block instance. A THIS pointer is automa

Certificate Expired If the certificate from the controller for encrypted communication has expired (valid from "not before" until "not after"), you get a prompt with a corresponding message in CODESYS