6.23 Setting the sequence options
Setting the sequence options
The sequence options influence the behavior of the sequential control system. The various
sequence options can be combined. The following sequence options can be set in the runtime
system:
● Command output
● Cyclic mode
● Time monitoring
Sequence option Meaning
Command output The actions of the active steps are executed if command output = "On".
With instruction output "Off", the actions of the active steps are not executed.
Cyclic mode If cyclic mode is "On", the system automatically continues with "Starting" after the operating
state "Completed".
In cyclic mode, a sequencer in the "Completed" state that is to be processed is exited again
immediately. Only the start step and final step are processed.
If cyclic mode is "Off", the sequential control system remains in the "Completed" state.
As long as there is no command to exit this state, "Completed" is continually processed
cyclically.
Note: This applies to all states that only can be exited by means of commands.
Time monitoring With time monitoring "On", the active time of each step being processed is compared with
the maximum runtime. If the maximum runtime is exceeded, a step error is signaled to WinCC.
In addition, an acknowledgement button for this step error is displayed in the SFC chart.
With time monitoring "Off", the active time and maximum runtime are not compared.
Operating and monitoring SFCs
6.23 Setting the sequence options
SFC Visualization (V9.0)
Programming and Operating Manual, 05/2017, A5E41356392-AA 67
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