Rockwell Automation Publication 1756-UM535D-EN-P - November 2012 185
Program the Redundant Controller Chapter 7
When using a 1756-L7x redundancy controller using version 19 software, and
the Memory Usage slider is set all the way to Tags, the first synchronization
attempt will be successful, but after switchover or disqualification, the next
qualification attempt will fail, and one or more entries will appear in the
secondary redundancy module event log with the following description: ‘(14)
Error Setting Up Data Tracking.’
To recover from this issue, move the slider slightly to the right. This must be
done offline or in Program mode. Additionally, you must download the
updated application to the disqualified secondary to update its configuration.
The next qualification attempt is successful.
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