8/25/2019
776856 - Lock for Update Fails
Lock for Update Fails
776856 | Date Created: 03/02/2016 | Last Updated: 05/29/2019
Access Level: TechConnect
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Question
Why am I failing a lock for update when going through the procedure for redundancy systems?
Abort
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Invalid response received from a module to "Lock for Update" command
Answer
Ensure there are none of the following:
Pending edits
Forces
Project inconsistencies
Incorrect firmware for communication modules
I/O faults
If there are faults (16#0203, 16#0204 etc) on I/O and it's known, inhibit the modules before starting the
lock for update procedure.
Major hardware differences (1756-RM and 1756-RM2, 1756-L65 and 1756-L75, etc.)
Notes:
The modules in the redundancy rack need to be at a supported bundle initially in order to update the system
while online
If the existing system isn't at a supported bundle then it will not be able to be updated while online
When migrating from 19 -> 20 there is a potential anomaly.
This is explained in 917386 - Redundancy Module Configuration Tool: Redundancy System Update Unable to Lock for Update (//rockwellautomation.custhelp.com/app/answers/detail/a_id/917386)
If all of this has been checked and the error is still occurring then please contact TechSupport.
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8/25/2019
776856 - Lock for Update Fails
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