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