Mitsubishi MELSEC-A A1SCPUC24-R2, User Manual

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A-24
USER PRECAUTONS
Precautions when using the AnS series
For a new CPU module, which has never used before, the contents of built-in
RAM and device data are undefined.
Make sure to clear the built-in RAM memory (PC memory all clear) in the CPU
module by peripheral devices and operate latch clear by RUN/STOP key
switches.
Precautions for battery
(1) The operation after a battery is unmounted and the programmable controller
is stored.
When reoperating after a battery is uncounted and the programmable
controller is stored, the contents of built-in RAM and device data may be
undefined. For this reason, make sure to clear the built-in RAM memory (PC
memory all clear) in the CPU module by peripheral devices and operate latch
clear by RUN/STOP key switch before start the operation again.
(2) If a battery exceeded its guaranteed life is stored and reoperated.
If a battery exceeded its guaranteed life is stored and reoperated, the
contents of built-in RAM and device data may be undefined. For this reason,
make sure to clear the built-in RAM memory (PC memory all clear) in the
CPU module by peripheral devices and operate latch clear by RUN/STOP
key switches before start the operation again.
After the built-in RAM clear and latch clear of the CPU module, write the
backed-up memory contents to the CPU module before saving.
* Refer to the following manuals for details of built-in RAM clear
(programmable controller memory all clear) by peripheral devices.
• GX Developer Operating Manual
• A6GPP/A6PHP Operating Manual
• SW
† SRX/SW † NX/SW † IVD-GPPA Operating Manual
Refer to Section 4.6 for latch clear operation by RUN/STOP key switch of the
CPU module.
POINT
Make sure to back-up each memory contents before storing the programmable controller.