
7. MEMORY CASSETTE AND BATTERY
7 - 2
MELSEC-A
7.1.2
Handling precautions
(1)
Handle memory cassettes and pin connectors with care since their plastic
bodies cannot resist strong impacts.
(2)
Do not remove the printed circuit board from its enclosure.
(3)
Take care not to let chips of wires and other foreign material enter the
memory cassette.
(4)
When installing a memory cassette in an AnSHCPU module, push it in so that
the connectors engage securely.
(5)
Never place a memory cassette on metal, which may allow current flow, or on
an object which is charged with static electricity, such as wood, plastic, vinyl,
fiber, cable or paper.
(6)
Do not touch or bend the leads of memory chips.
(7)
Do not touch the connectors of a memory cassette. This could cause
insecure contact.
POINT
(1)
Always turn OFF the power to an AnSHCPU module when installing or
removing a memory cassette. If a memory cassette is installed or
removed with the power to the CPU ON, the data contents of the memory
may be destroyed while the AnSCPU power is live.
(2)
If the power is turned ON when the memory cassette is installed, the
program in the built-in RAM memory of the CPU module is overwritten by
that of the memory cassette.
If the program in the RAM memory needs to be saved, install the memory
cassette after making a backup of the program by using a programming
device.
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