Resume Batch Processing after a Failure

As the AVEVA Batch Management System runs batches and allocates equipment, Batch Manager stores each event in data files residing in the .BatchWR folder. By retaining all of the batch processing and equipment allocation actions, Batch Manager can resume batch processing following a system failure. In the event of a failure, the sequence of operation in the following list occurs. Operator interaction is denoted where applicable.

1. When a system failure occurs, you must completely shut down the batch control system if the failure did not automatically accomplish this action.

2. You must restart the Batch Control system.

3. All equipment allocated by any of the previously active batches remain allocated.

4. All batches previously in the Batch Scheduler are returned to the scheduler with their previous status. The exceptions to this are that the Execute in Order option in the Batch Scheduler are not set upon restarting the system and all batches that were in the run state prior to the failure are in the Held state when the system is restarted.

   For more information on changing the mode in which batches are resumed, see Using Batch Restart Mode.

5. The statuses of all phases are unchanged during a system failure that does not involve the control system. In other words, phases that were running before the failure continue to run during the failure. However, phases that previously had or change to a status of Held, Done, or Aborted remain in that state until the AVEVA Batch Management System is restarted. Batch Manager resumes the batches that control these phases. Upon resuming these batches, Batch Manager restarts or resets the affected phases.

6. The mode of all batches and the value of all phase parameters is unchanged following the restart of a failed system.