Omron CS1W-SCU21 Operation Manual page 175

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Example 1
Sequence
Step No. 00
Step No. 01
When the sequence ends normally
Protocol Macro
Executing Flag
Sequence
executed
Sequence End
Completion Flag
Step Error
Processing
Flag
When the sequence ends abnormally
Protocol Macro
Executing Flag
Sequence
executed
Sequence Abort
Completion Flag
Step Error
Processing
Flag

Error
Sequence ended
abnormally
Sequence ended
abnormally
Error
Sequence ended
normally
Sequence Sequence
completed re-executed
Sequence Sequence
completed re-executed
Note The Step Error Processing Flag is used to see whether error processing has been executed for
an individual step in a sequence, and not for the overall steps. Therefore, as shown in Example 2
above, after executing error processing during a sequence (step No. 00), the flag will remain ON,
even if the next step ends normally. Care is therefore required because it is not always possible
to use this flag to determine whether the overall sequence has ended abnormally.
Example 2
Sequence
Step No. 00
Error
Step No. 01 Step No. 02
Sequence ended
normally
When the sequence ends normally
Protocol Macro
Executing Flag
Sequence
executed
Sequence End
Completion Flag
Step Error
Processing
Flag
When the sequence ends abnormally
Protocol Macro
Executing Flag
Sequence
executed
Sequence Abort
Completion Flag
Error processing
for step No. 00
Step Error
Processing
Flag
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Error
Sequence ended
abnormally
Sequence ended
normally
Sequence Sequence
completed re-executed
Error processing
for step No. 00
Sequence
Sequence
completed
re-executed