Mitsubishi Electric Q26UD(E)HCPU User Manual page 264

(2) Replacing Q3MEM-4MBS and Q3MEM-8MBS
Backup the program and the
data.
Remove a memory card
protective cover of the CPU
module at power-on status of
the programmable controller.
With a flat-blade screwdriver, etc.,
remove the battery holder locking
switch from the LOCK position.
Remove the battery holder from
the SRAM card.
Remove the old battery from its
holder.
Insert a new battery into the
holder in the correct direction.
Deeply insert the SRAM card
into the battery holder.
Set a battery holder fixing switch
to the LOCK position
Set the memory card protective
cover on the CPU module.
SD52 to check if bit 1 and bit
Failure of SRAM card battery
262
Replacing battery
Monitor
OFF
SM52 to verify on/off.
ON
Monitor
Bit 1 and bit 2 are OFF.
2 are ON.
Bit 1 and bit 2 are ON.
Remove a cover,
pressing the top and
bottom fixing claws.
CPU
module
CPU
module
Battery holder
Release
direction
Battery holder
fixing switch
CPU
module
Facing "+ (positive)"
up, install the battery
LOCK
Battery holder
fixing switch
Clears the error.
Page 410, Appendix 1.10
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