(2) When an error occurs in job execution
(a) The job execution is canceled when the error cause is the following:
• Failure in device data writing due to network disconnection within the PLC system
• Failure in device data writing, or operation error
• Failure in access to the database (Except jobs for which [Enable DB buffering] is selected)
(b) If a job execution is canceled, the operation processed before the error occurrence returns to the status
before the job execution.
The following explains access to GOT device data and the database.
(1) GOT device data
Since all of data are written to the device data area in the GOT at a time upon completion of job execution, any
change due to the error is not reflected in the device data of the GOT.
Rollback is executed assuming the time immediately before job activation as a commit point.
However, when the database is Wonderware
When an error occurs during inserting data into a database, the data inserted into the database before
occurring the error are reflected.
(c) When [Notify errors (job cancellation) that occur during job execution] has been selected, a value is
assigned to the specified tag component.
6.7.5 Notify errors (job cancellation) that occur during job execution
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5.1.10 DB buffering function
Historian, rollback is not executed.