Chapter 13 Maintenance And Inspection; Daily Inspection - Mitsubishi Electric Q26UD(E)HCPU User Manual

CHAPTER 13
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.
No. Inspection item
1 Installation of base unit
2 Installation of I/O module
3 Connecting conditions
Power supply module
*1
POWER LED
Power supply module LIFE
*2
LED
CPU module MODE LED
CPU module RUN LED
CPU module ERR. LED
4
CPU module BAT. LED
Input module Input LED
Output module Output LED
*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.
MAINTENANCE AND INSPECTION
Inspection details
Check that installation screws
are not loose and the cover is
not dislocated.
Check that the module is not
dislocated and the module
fixing hook is engaged
securely.
Check for loose terminal
screws.
Check for distance between
solderless terminals.
Check that the cable
connector is not loose.
Check that the LED is on.
Check that the LED is on.
*3
Check that the LED is on.
Check that the LED is on in
the RUN status.
Check that the LED is off.
*4
Check that the LED is off.
Check that the LED turns on
and off.
Check that the LED turns on
and off.

CHAPTER 13 MAINTENANCE AND INSPECTION

Criteria
The screws and cover must be installed securely.
The module fixing hook must be engaged and installed
securely.
Screws must not be loose.
The proper clearance must be provided between
solderless terminals.
Connections must no be loose.
The LED must be on (green).
(Error if the LED is off or on (red)).
The LED must be on (green or orange) or flashing
(orange).
(Error if the LED is off, on (red), or flashing (red))
The LED must be on (green).
(Error if the LED is off or flashing.)
The LED must be on. (Error if the LED is off.)
The LED must be off. (Error if the LED is on or
flashing.)
The LED must be off. (Error if the LED is on.)
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.)
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.)
Action
13
Retighten the screws.
Securely engaged the
module fixing hook.
Retighten the terminal
screws.
Correct.
Retighten the
connector fixing
screws.
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