Replacing A Redundant Power Supply Module; Replacing A Redundant Function Module; Replacing A Network Module - Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual

Replacing a redundant power supply module

Select the standby system or control system and power off and replace the redundant power supply module in the system.
After that, power off and replace the module in the other system. Since the redundant power supply module that is not the
replacement target supplies power to the modules on the base unit, controls can be continuously performed during
replacement of the other redundant power supply module.
For the replacement procedure, refer to the following.
 MELSEC iQ-R Module Configuration Manual

Replacing a redundant function module

This section describes the procedure for replacing the redundant function module.
1.
Check the system of the replacement target power supply module.
Check the CTRL LED and SBY LED of the redundant function module in the system of the replacement target module for the
following. The target module is in the standby system in this case.
• The CTRL LED is off and the SBY LED is on on the redundant function module of the system of the replacement target
CPU module.
2.
Power off the standby system.
Power off the standby system. When the standby system is powered off, the BACKUP LED of the redundant function module
in the control system flashes.
3.
Replace the redundant function module in the standby system.
Replace the redundant function module in the standby system.
4.
Power on the standby system.
Power on the standby system. When the standby system is powered on, the BACKUP LED of the redundant function module
in the control system turns on.
5.
Check the modules for errors.
Check that no error has occurred on the CPU module or redundant function module in the standby system. If the ERROR LED
of either of the modules is on or flashes, check the cause of an error and eliminate the error cause.

Replacing a network module

This section describes the procedure for replacing the network module.
1.
Check the system of the replacement target power supply module.
Check the CTRL LED and SBY LED of the redundant function module in the system of the replacement target module for the
following. The target module is in the standby system in this case.
• The CTRL LED is off and the SBY LED is on on the redundant function module of the system of the replacement target
CPU module.
2.
Power off the standby system.
Power off the standby system. When the standby system is powered off, the BACKUP LED of the redundant function module
in the control system flashes.
3.
Replace the network module in the standby system.
Replace the network module in the standby system with a new network module whose model is the same as that of the
network module in the control system.
4.
Power on the standby system.
Power on the standby system. When the standby system is powered on, the BACKUP LED of the redundant function module
in the control system turns on.
5.
Perform network diagnostics on the standby system.
Check that no error has occurred on the network module.
40 MAINTENANCE AND INSPECTION FOR A SYSTEM USING SIL2 PROCESS CPU
40.1 Module Replacement in a System Using the SIL2 Process CPU
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