10. MAINTENANCE AND INSPECTION
10 - 1
MELSEC-
10. MAINTENANCE AND INSPECTION
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DANGER
•
Do not touch a terminal while power is supplied.
Doing so may result in electric shock or a malfunction.
•
Connect the battery correctly. Do not perform charging, disassembly, heating, throwing into fire,
short-circuit, soldering and so on.
Handling the battery incorrectly may cause injuries or a fire due to overheating, blowout, ignition and
so on.
•
Be sure to shut down all phases of the external power supply before cleaning the module or
retightening terminal screws.
Unless all phases are shut down, electric shock may occur.
Tightening the screws insufficiently may cause the module to fall, short-circuit, or malfunction.
Tightening the screws too much may cause the module to fall, short-circuit, or malfunction due to
damage to the screws or the module.
!
CAUTION
•
Read the manuals carefully and confirm safety before performing online operation (in particular,
changing a program, performing forced output, or changing the operation status) while connecting a
peripheral device to the running CPU module.
Erroneous operations may cause damage to the machine or an accident.
•
Do not disassemble or modify the module.
Doing so may cause a failure, malfunction, injury, or fire.
•
Be sure to shut down all phases of the external power supply before installing or removing the module.
Otherwise it may cause a failure or malfunction of the module.
•
When using a cellular phone or PHS, keep it 25cm or more away from the PLC.
This chapter describes items to be checked in daily and periodic maintenance and
inspection in order to maintain the programmable controller in the normal and
optimum condition.
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