8.2.4 Run sequence
Principle of the run sequence
A runtime group is created for every CFC chart (process tag) automatically upon creation. The
"Predecessor for runtime sequence" function in the runtime editor provides the option of
determining the installation position of the next CFC chart within a cyclic interrupt OB. All blocks
of a CFC chart are therefore assigned to the same cyclic interrupt OB. This ensures that the
channel drivers and technological blocks are processed in the same cycle in a runtime
sequence.
Note
If blocks with startup characteristics are included, these are also integrated in OB 100.
Execution time of the runtime groups
You can set the execution time of the process tags by inserting the corresponding runtime
group in one of the following cyclic interrupt OBs.
Cyclic interrupt OB Default value for time frame Default value for priority class
OB 30 5 s 7
OB 31 2 s 8
OB 32 1 s 9
OB 33 500 ms 10
OB 34 200 ms 11
OB 35 100 ms 12
OB 36 50 ms 13
Configuring AS functions
8.2 Creating process tags
Compendium Part A - Configuration Guidelines (V8.2)
Configuration Manual, 08/2016, A5E38166869-AA 169
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