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CHAPTER 13 MAINTENANCE AND INSPECTION
13
13.1 Daily Inspection
CHAPTER 13MAINTENANCE AND INSPECTION
This chapter describes items that must be maintained or inspected daily or periodically to properly use a
programmable controller in optimal condition at all times.
13.1 Daily Inspection
This section describes items that must be inspected daily.
*1 For the Q00JCPU and Q00UJCPU, check the POWER LED on the CPU module side.
*2 When the Life detection power supply module is used, check the LIFE LED.
*3 The Basic model QCPU does not have the MODE LED.
*4 The Basic model QCPU does not have the BAT. LED.
No. Inspection item Inspection details Criteria Action
1 Installation of base unit
Check that installation screws
are not loose and the cover is
not dislocated.
The screws and cover must be installed securely. Retighten the screws.
2 Installation of I/O module
Check that the module is not
dislocated and the module
fixing hook is engaged
securely.
The module fixing hook must be engaged and installed
securely.
Securely engaged the
module fixing hook.
3 Connecting conditions
Check for loose terminal
screws.
Screws must not be loose.
Retighten the terminal
screws.
Check for distance between
solderless terminals.
The proper clearance must be provided between
solderless terminals.
Correct.
Check that the cable
connector is not loose.
Connections must no be loose.
Retighten the
connector fixing
screws.
4
Module indication LED
Power supply module
POWER LED
*1
Check that the LED is on.
The LED must be on (green).
(Error if the LED is off or on (red)).
Page 277,
Section 15.1
Power supply module LIFE
LED
*2
Check that the LED is on.
The LED must be on (green or orange) or flashing
(orange).
(Error if the LED is off, on (red), or flashing (red))
CPU module MODE LED
*3
Check that the LED is on.
The LED must be on (green).
(Error if the LED is off or flashing.)
CPU module RUN LED
Check that the LED is on in
the RUN status.
The LED must be on. (Error if the LED is off.)
CPU module ERR. LED Check that the LED is off.
The LED must be off. (Error if the LED is on or
flashing.)
CPU module BAT. LED
*4
Check that the LED is off. The LED must be off. (Error if the LED is on.)
Input module Input LED
Check that the LED turns on
and 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.
(Error if the LED does not turn on or turn off as
indicated above.)
Output module Output LED
Check that the LED turns on
and off.
The LED turns on when the output power is turned on.
The LED must be off when the output power is turned
off.
(Error if the LED does not turn on or turn off as
indicated above.)
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