Sram Card Battery Replacement Procedure - Mitsubishi Electric Q26UD(E)HCPU User Manual

13.3.2

SRAM card battery replacement procedure

Replace the SRAM card battery in the following procedure.
(1) Replacing Q2MEM-1MBS and Q2MEM-2MBS
Replacing battery
Backup the program and the
data.
Open the front cover while the
programmable controller power
supply is on.
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.
Check that the battery holder
fixing switch is set to the LOCK
position.
Deeply insert the SRAM card
into the battery holder.
Monitor
SM52 to verify on/off.
ON
Monitor
SD52 to check if bit 1 and bit
2 are ON.
Bit 1 and bit 2 are ON.
Failure of SRAM card battery
Battery holder
OFF
Bit 1 and bit 2 are OFF.
Clears the error.
CHAPTER 13 MAINTENANCE AND INSPECTION
Release
direction
Battery holder
fixing switch
CPU
module
Used battery
Battery holder
New battery
Lock
direction
Battery holder
fixing switch*
* The battery holder fixing switch is
automatically set to the "LOCK" position
when the battery holder is removed. In its
position, insert the battery holder to the
end.
Put + toward you.
Page 410, Appendix 1.10
Completed
CPU
module
Flat blade
screwdriver
CPU
module
CPU
module
261
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