8. Set the new CPM’s mode switch position to STOP (to enable
firmware update).
9. Using an external (user-supplied) switch, re-connect the power
supply in the rack (associated with the new CPM) to the source
main power.
10. Optional-for IPsec enable system, setup certificates and IPsec
policy in the CPM. See "Setup certificates and IPsec policy in
PLC/RTU" in ControlEdge PLC and ControlEdge RTU Network and
Security Guide for more information.
11. Use the ControlEdge Builder to load firmware to the new CPM to
match the version that is running in the primary redundant
partner CPM.
12. Check the redundancy synchronization state by monitoring the
role LED of the primary or secondary CPM.
13. Switch the new secondary CPM’s mode switch position to match
the primary redundant partner CPM.
Replacing a primary PLC-CPM
ATTENTION: Replacing a synchronized primary CPM can be
performed while on-process or off-process.
Replacing an unsynchronized primary CPM can only be
performed off-process.
We recommend that you proceed with extreme caution
whenever replacing any component in a control system. Be
sure the system is offline or in a safe operating mode.
Component replacements may also require firmware update
and/or downloading appropriate configuration data to the
replaced component through ControlEdge Builder.
Wear an ESD wrist strap and observe static precautions.
You will need a #2 Phillips screwdriver.
Replacing an unsynchronized primary PLC-CPM
n It is recommended to first establish redundancy synchronization
between the redundant controllers (when possible) and follow the
procedure to replace a synchronized primary PLC-CPM below.
n When primary CPM on-process replacement is either not required
or not possible due to inability to synchronize the redundant
controllers, follow the off-process procedures in Replacing a non-
redundant PLC-CPM section.
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