21.
21 -
2
MAINTENANCE AND INSPECTION
21.2 Periodic Inspection
Inspection on items shown below should be conducted once or twice every six months to a
year. Conduct the inspection when the equipment is moved or modified, or wiring is
changed.
Table 21.2 Periodic inspection
Item
Check item
Check method
Judgement
Action
1
A
m
bient
env
ironment
Ambient temperature
Measure with
temperature and
humidity gauge.
Measure presence of
corrosive gases.
0 to 55
When used in a panel,
temperature inside the
panel is the ambient
temperature.
Ambient humidity
10 to 90%RH
Atmosphere
There is no corrosive
gas present.
2
Line voltage check
100/200VAC,
24VDC, 110VDC
Measure voltage across
100/200VAC terminals.
85 to 132VAC
Change the power
supply.
170 to 264VAC
15.6 to 31.2VDC
85 to 140VDC
3
Fuse
Check if the fuse is
blown.
(Preventive
maintenance)
Even if a fuse has not
blown, the element may
have deteriorated due to
inrush current, and the
fuse should therefore be
changed at regular
intervals.
4
In
st
al
lat
ion co
ndi
tion
Loosening, backlash
Test by moving the
module.
Must be installed solidly.
Retighten the screw.
For CPU module, I/O
module, and power
supply modules check
all connections.
Adhesion of dirt or
foreign matters
Visual inspection
No adhesion.
Remove and clean.
5
Connec
tion condit
ions
Loosening of
terminal screw
Retighten with a
screwdriver.
No loosening.
Retighten.
Proximity of
solderless terminals
Visual inspection
There is an appropriate
distance.
Correct the distance.
Loosening of
connector
Visual inspection
No loosening.
Retighten the connector
fixing screw.
6
Battery
Confirm SM51 or SM52
is OFF with a peripheral
device in the monitoring
mode.
(Preventive
maintenance)
Even when there is no
low-battery display,
replace if specified life is
exceeded.
Summary of Contents for Q2ACPU
Page 1: ......
Page 2: ......
Page 221: ...12 12 12 OVERVIEW OF PROCESSING PERFORMED BY THE QnACPU ...
Page 222: ...12 13 12 OVERVIEW OF PROCESSING PERFORMED BY THE QnACPU ...
Page 237: ...12 28 12 OVERVIEW OF PROCESSING PERFORMED BY THE QnACPU MEMO ...
Page 271: ...16 13 16 POWER SUPPLY MODULE 4 Names and description of parts of the A66P ...
Page 343: ...21 21 13 MAINTENANCE AND INSPECTION 21 4 2 Replacement of the fuse for an output module ...
Page 357: ...22 12 22 TROUBLESHOOTING ...
Page 359: ...22 14 22 TROUBLESHOOTING MEMO ...
Page 429: ...App 32 APPENDICES Trigonometric function Classification Symbol Description ...
Page 537: ...App 140 APPENDICES REMARK 1 Message 1 An error code is displayed in 2 Alert 1 3 Alert 2 ...
Page 539: ...App 142 APPENDICES 2 Q2ACPU Q2ACPU S1 modules Unit mm inch ...
Page 541: ...App 144 APPENDICES 2 A66P power supply module Unit mm inch ...
Page 543: ...App 146 APPENDICES 3 A35B base unit 4 A38B A38HB A38HBEU base unit Unit mm inch Unit mm inch ...
Page 567: ...MEMO ...
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