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7 MAINTENANCE AND INSPECTION
7.2 Daily Inspection
Daily inspection items are as follows.
Number
Inspection Item
1
Module mounting status
Loose terminal
screws
Proximate
2
Connection status
solderless
terminals
Loose
connectors
7.3 Periodic Inspection
Inspection items to be checked once or twice in six months or one year are as follows.
The following inspection should also be performed when equipment has been moved
or modified or the wiring changed.
Number
Inspection Item
Ambient
temperature
Surrounding
1
Ambient
environment
humidity
Atmosphere
2
Power supply voltage check
Looseness
3
Mounting status
Dirt, foreign
matter
Loose terminal
screws
Proximate
4
Connection status
solderless
terminals
Loose
connectors
7 - 2
Inspection Method
Check for loose mounting
screws and disconnected
Securely mounted
cover
Retighten screws with
Not loose
screwdriver
Visual check
Proper intervals
Visual check
Not loose
Inspection Method
Display section 0 to 40°C
Other portions
Make measurement with
thermometer or hygrometer
10 to 90%RH
Measure corrosive gas
No corrosive gas
100 to 240VAC
Measure voltage across
85AC to 242V
terminals.
24VDC
15.6DC to 31.2V
Measure voltage across
terminals
Move module
Should be mounted firmly
Visual check
No dirt, foreign matter sticking Remove, clean
Retighten screws with
Not loose
screwdriver
Visual check
Proper intervals
Visual check
Not loose
MELSEC-GOT
Criterion
Action
Retighten screws
Retighten terminal screws
Correct
Retighten connector fixing
screws
Criterion
Action
0 to 55°C
For use in enclosure,
temperature inside enclosure
is ambient temperature
Change supply power
Retighten screws
Retighten terminal screws
Correct
Retighten connector fixing
screws
7
7 - 2
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