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6 INSPECTION AND MAINTENANCE
6.2 Daily Inspection
The items that must be inspected daily are listed below.
Table 6.1 Daily Inspection
Item Inspection item Inspection Criterion Action
1
Installation of the base
unit
Check that the fixing
screws are not loose and
the cover is not dislocated.
The screws and cover must be installed
correctly.
Retighten the
screws.
2
Installation of the I/O
module, etc.
Check that the module is
not dislocated and the unit
fixing hook is engaged
correctly.
The unit fixing hook must be engaged and
installed correctly.
Correctly
engaged the
unit fixing hook.
Check that terminal screws
are not loose.
Screws should not be loose.
Retighten the
terminal screws.
Check distance between of
crimping terminals.
Crimping terminals must be positioned at
proper intervals.
Correct.
3 Connecting condition
Check connectors of
extension cable.
Connector must not be loose.
Retighten the
connector fixing
screws.
Power supply module
Power supply
[POWER] LED
Check that the LED is ON.
The LED must be ON (green).
(Abnormal if the LED is OFF.)
CPU
[RUN] LED
Check that the LED is ON
in RUN state.
The LED must be ON.
(Abnormal if the LED is OFF.)
CPU
[ERR.] LED
Check that the LED is OFF.
The LED must be OFF.
(Abnormal if the LED is ON or flickers.)
CPU
[USER] LED
Check that the LED is ON.
The LED must be ON in the detection of CHK
instruction or annunciator [F] is ON.
CPU
[BOOT] LED
Check that the LED is
ON/OFF.
The LED must be ON in the mode operated by
ROM.
The LED must be OFF in the mode operated
by RAM/Installation mode • mode written in
ROM.
PLC CPU module
CPU
[BAT.] LED
Check that the LED is OFF.
The LED must be OFF.
(Abnormal if the LED is ON.)
Refer to
"QCPU User's
Manual
(Function
Explanation
/Program
Fundamentals)".
CPU
[MODE] LED
Check that the LED is ON.
The LED must be ON (green).
(Abnormal if the LED is OFF.)
The LED must be ON (orange) in the
Installation mode • Mode written in ROM.
(Abnormal if the LED is OFF.)
CPU
[RUN] LED
Check that the LED is ON.
The LED must be ON.
(Abnormal if the LED is OFF.)
CPU
[ERR.] LED
Check that the LED is OFF.
The LED must be OFF.
(Abnormal if the LED is ON or flickers.)
CPU
[M.RUN] LED
Check that the LED is ON
in RUN state.
The LED must be ON during operation in
motion control.
(Abnormal if the LED is OFF.)
4
Module indication LED
Motion CPU module
CPU
[BAT.] LED
Check that the LED is OFF.
The LED must be OFF.
(Abnormal if the LED is ON.)
Refer to Section
2.4.1