Instruction manual

6 - 4
6 INSPECTION AND MAINTENANCE
6.2 Daily Inspection
The items that must be inspected daily are shown below.
Table 6.1 Daily Inspection
Item Inspection item Inspection Criterion Action
1 Mounting of base unit
Check that the fixing screws
are not loose and the cover
is not dislocated.
The screws and cover must be mounted securely.
Retighten the
screws.
2
Installation of Motion
modules and I/O
modules
Check that the module is not
dislocated and the unit fixing
hook is engaged securely.
The module fixing hook must be engaged and installed
correctly.
Securely engaged
the module fixing
hook.
3 Connecting conditions
Check for loose terminal
screws.
Screws should not be loose.
Retighten the
terminal screws.
Check the distance between
solderless terminals.
The proper clearance should be provided between
solderless terminals.
Correct.
Check the connector part of
the cable.
Connections should not be loose.
Retighten the
connector fixing
screws.
4
Module indication LED
Power supply module
[POWER]
LED
Check that the LED is ON.
The LED must be ON (green).
(Abnormal if the LED is OFF or ON (red)).
Refer to
"QnUCPU User's
Manual (Function
Explanation,
Program Funda-
mentals)".
PLC CPU module
[MODE] LED Check that the LED is ON.
The LED must be ON (green).
(Abnormal if the LED is OFF or flickering.)
[RUN] LED
Check that the LED is ON in
RUN status.
The LED must be ON.
(Abnormal if the LED is OFF.)
[ERR.] LED Check that the LED is OFF.
The LED must be OFF.
(Abnormal if the LED is ON or flickering.)
[BAT.] LED Check that the LED is OFF.
The LED must be OFF.
(Abnormal if the LED is ON.)
Motion CPU module
Normal
Steady "RUN" display.
(Abnormal if "RUN" does not display or incorrect display.)
Refer to Section
2.5.1
Steady "STP" display.
(Abnormal if "STP" does not display or incorrect display.)
Battery error
warning
(2.7V or less)
"BT1" does not display.
(Abnormal if steady "BT1" display.)
Refer to Section
6.5
Battery error
warning
(2.5V or less)
"BT2" does not display.
(Abnormal if steady "BT2" display.)
WDT error
" . . . " does not display.
(Abnormal if steady " . . ." display.)
Refer to Section
2.5.1
Others
" AL" does not flash.
(Abnormal if " . . ." flashes.)
I/O module
Input LED
Check that the LED is
ON/OFF.
The LED must be ON when the input power is turned ON.
The LED must be OFF when the input power is turned OFF.
(Abnormal if the LED does not turn ON or turn OFF as
indicated above.)
Refer to
"I/O Module Type
Building Block
User's Manual".
Output LED
Check that the LED is
ON/OFF.
The LED must be ON when the output power is turned ON.
The LED must be OFF when the output power is turned
OFF.
(Abnormal if the LED does not turn ON or turn OFF as
indicated above.)