Rockwell Automation Publication 1756-UM535D-EN-P - November 2012 131
Configure the Redundancy Modules Chapter 6
System Update Commands
The three system update commands are available only when accessing a primary
redundancy module. These commands are not available when accessing the
secondary redundancy module.
Lock For Update
The Lock for Update command lets you to synchronize a redundant chassis pair
in these conditions:
• The secondary redundancy module uses updated firmware and an updated
RSLogix 5000 software application program version.
• The running primary redundancy module uses a previous firmware
revision and previous RSLogix 5000 software application program
version.
The Lock for Update command is available only when all the modules in the
primary chassis have no compatibility anomalies. Before issuing the lock
command, verify that you have completed these tasks:
• Set the Auto-Synchronization option in the Configuration tab to Never.
• Disqualify the secondary chassis by using the Disqualify Secondary
command in the Synchronization tab of the secondary redundancy
module’s RMCT.
• Updated the primary and secondary redundancy modules to compatible
firmware revisions.
• Updated all other modules in the secondary chassis to their intended
firmware revisions.
• Made changes to the controller project that are required to accommodate
the update and replacement of modules if needed.
For details about completing those tasks, see Step 4: Update Redundant Chassis
Firmware on page 67.
While you are completing tasks to update the system by using the system
update commands, you cannot access these tabs in the RMCT:
• Configuration
• Synchronization
• Synchronization Status
Attempting to access any of these tabs while the system is locked or is
completing a locked switchover results in a error dialog box.
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