Applicable variables

Synchronous variables must be used for writing within a real-time cycle. The reason for this is that the values of these variables are available at the time of execution. Variables which are not available at the time of declaration are treated as constants and are therefore unassignable.

The following variables can be used:

• V.E variables if they are marked as synchronous
• V.RTG/V.RTA variables
• V.CH variables if they are marked as synchronous

These variable types are discussed in the next subsections.

Notice

Only synchronised variables may be written in a real-time cycle.

If asynchronous variables are written, error ID 22009 is output.