Mitsubishi Electric Q06HCPU - Replacement Procedure of the Battery; Replacement Procedure of the CPU Module Battery

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CHAPTER 13 MAINTENANCE AND INSPECTION
13
13.3 Replacement Procedure of the Battery 13.3.1 Replacement procedure of the CPU module battery
13.3 Replacement Procedure of the Battery
13.3.1 Replacement procedure of the CPU module battery
Replace the battery of the CPU module by the following procedures when it comes to the end of its life.
The programmable controller power must be on for 10 minutes or longer before dismounting the battery.
Data in the memory are backed up for a while by a capacitor even after the battery is removed. However, since data in
the memory may be erased if the time for replacement exceeds the backup time, replace the battery quickly.
(1) Replacement procedure for the Basic model QCPU's Q6BAT battery
Backup time
3 minutes
Open the CPU module front cover.
Remove the old battery from its
holder.
Insert a new battery into the holder
in the correct direction. Connect
the lead to the connector.
Close the CPU module front cover.
ON
OFF
Bit 0 is ON.
Bit 0 is OFF.
Failure of CPU module battery
Completed
Monitor
SM51 to check
ON/OFF.
Monitor
SD52 to check if bit 0 is
ON.
Replacing battery
CPU module
Connector CPU
module side
Connector
battery side
Backup the program and the
data.
Turn OFF the programmable controller
power supply.
Turn ON the programmable controller
power supply.