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2
10. MAINTENANCE AND INSPECTION
10.1 Daily Inspection
Dairy inspection items recommended are shown in Table 10.1.
Table 10.1 Dairy inspection
Item
Check item
Content of inspection
Judgement
Action
1
Installation condition of
the base unit
Confirm if mounting
screws are not loose or
cover is not detached.
It is installed securely. Retighten the screw.
2
Installation condition of
the I/O modules
Confirm if the module
mounting screw is firmly
tightened.
The module mounting
screws are firmly
tightened.
Tighten the module
mounting screw firmly.
3
Connection conditions
Loosening of terminal
screw
No loosening.
Retighten the terminal
screw.
Proximity of solderless
terminals
There is an
appropriate distance.
Correct the distance.
Connector areas of
extension cable
No loosening at
connectors.
Retighten the
connector fixing
screw.
4
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POWER LED
Confirm it is ON.
The LED is ON.
(Faulty if it is OFF.)
"RUN" LED
Confirm it is ON in the
"RUN" state.
The LED is ON.
(Faulty if it is OFF or
flickering.)
Section 11.2.3
Per Section 11.2.4.
"ERROR" LED
Confirm it is ON at error
occurrence.
The LED is OFF.
(ON when error has
occurred.)
Section 11.2.5
Per Section 11.2.6.
Input LED
Confirm if it correctly
turns on and off.
The LED is ON when
input is ON,
and OFF when input
is OFF.
(Faulty other than the
above.)
Output LED
Confirm if it correctly
turns on and off.
The LED is ON when
output is ON,
and OFF when output
is OFF.
(Faulty other than the
above.)
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