Use of variables with the 9400 HighLine in the FB editor of the L-force Engineer

Question:
What do you have to observe when using variables with the 9400 HighLine in the FB editor of the L-force Engineer?

Answer:
With the 9400 HighLine, variables are not read or written at any position in the program flow, but they are executed at the beginning or end of the task cycle. The sequence for variable processing is as follows:

1. Process input image creation
2. Reading of variable values (writing of the FB inputs whose status is derived from variable values)
3. Function block processing in the defined order (reading of FB inputs which are derived from other Function blocks / System blocks)
4. Writing of variable values
5. Process output image creation
This fixed sequence may lead to unintended time delays when variables are used for the temporary storage of signals.