Hot Standby Module Replacement
Original instructions
Replacing a Module without Stopping
A module to be replaced must be in the standby controller with its CPU in the OFFLINE mode. If the inoperative module is in the primary PLC, perform a switchover to move the module to the standby mode, then move the standby PLC to the OFFLINE mode.
The OFFLINE mode ensures that the system does not try to do a Switchover while replacing a module. The primary PLC continues to control the system as a non-redundant standalone PLC during the module replacement.
Ensure that the new module being replaced:
WARNING
UNEXPECTED EQUIPMENT BEHAVIOUR
Do not remove a module from the primary PLC that is under power (Hot Swapping is not allowed in the primary PLC of a Quantum Hot Standby system).
Failure to follow these instructions can result in death, serious injury, or equipment damage.