Lock for Update
The Lock for Update command enables you to synchronize a redundant chassis pair under these conditions:
- The secondary redundancy module uses a firmware revision and programming software version that is later than the primary redundancy module.
- The active primary redundancy module uses a firmware revision and programming software version that is earlier than the secondary redundancy module.
IMPORTANT:
During a lock for update in Logix SIS applications, the safety function is temporarily muted for up to 2 seconds + 1 safety task period.
The Lock for Update command is available only when all modules in the primary chassis have no compatibility discrepancies. Before issuing the lock command, complete these tasks:
- On the Configuration tab, set Auto-synchronization to Never.
- Disqualify the secondary chassis by using the Disqualify Secondary command on the Synchronization tab of the secondary redundancy module.
- Update the primary and secondary redundancy modules to compatible firmware revisions.
- Update all other modules in the secondary chassis to their intended firmware revisions.
- Configure the controller project as required to accommodate the update and replacement of modules if needed.
The lock can take several minutes to complete. To determine when the lock is complete, check the following:
- System Update Lock Attempts log on the System Update tab. The status changes from In Progress to Locked.
- Chassis status in the status bar at the bottom of the dialog box. The status changes from Primary with Disqualified Secondary to Primary Locked for Update.
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