Replacing The Power Supply Module; Replacing The Redundant Power Supply Module - Mitsubishi Electric MELSEC iQ-R Series User Manual

Replacing the power supply module

The following describes the procedure for replacing the power supply module on the main base unit of the standby system
after turning the power off while the redundant system is operating. When the replacement target is in the control system, turn
on SM1646 (System switching by a user) in advance and switch the system to the standby system.
1.
Checking the system of the replacement target module
Check the CTRL LED and SBY LED of the redundant function module in the system to which the replacement target module
belongs, and confirm that the replacement target module is in the standby system.
• The CTRL LED is off and the SBY LED is on.
2.
Powering 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. (The control system enters the wait state for the start-up of the other system.)
3.
Replacing the power supply module in the standby system
Replace the power supply module in the standby system.
4.
Powering on the standby system
Check that the cables are correctly connected to the power supply module and the power supply voltage is normal, and then
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. (The control system no longer waits for the start-up of the other system.)

Replacing the redundant power supply module

To replace a redundant power supply module while the redundant system is operating, if the power supply system is
redundant, replace one power supply module at a time after powering it off while the system is operating. 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
35 MAINTENANCE AND INSPECTION OF A REDUNDANT SYSTEM
544
35.1 Module Replacement in a Redundant System