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6.12 Maintenance and Inspection
6.12.1 Daily inspection
6
PREPARATORY PROCEDURES AND SETTING
6.12.1 Daily inspection
The following table lists the items to be inspected daily.
* 1 The MODE LED flashes to notify that the C Controller has completed its shutdown. (Flashing does
not indicate an error.)
Table 6.26 Daily inspection
No. Item Inspection Criterion Action
1 Installation of base unit
Check the fixing screws and
cover for looseness.
The base unit is securely
installed.
Retighten the screws.
2 Installation of I/O modules
Check the module and
module fixing hook for
looseness.
The module fixing hooks are
securely engaged and the
modules are securely
mounted.
Securely engage the module
fixing hooks.
3 Connection
Check the terminal screws for
looseness.
No looseness. Retighten the terminal screws.
Check the distance between
solderless terminals.
Proper clearance between
solderless terminals.
Provide proper clearance
between solderless terminals
Check the connector part of
the cable.
Connectors are securely
connected.
Retighten the connector fixing
screws.
4
Indicator LEDs
Power supply module
POWER LED
Check that the LED is lit.
Lit green.
(Faulty if the LED is off)
Page 16-4, Section
16.2.1
C Controller module
MODE LED
Check that the LED is lit. in
the RUN status.
Lit
*1
(Faulty if the LED is off)
Page 16-5, Section
16.2.2
C Controller module
ERR. LED
Check that the LED is off.
Off
(Faulty if the LED is off or
flashing)
Page 16-7, Section
16.2.3
C Controller module
7-segment LED
(Q12DCCPU-V only)
Check for on/off of the LED.
On/off reactions of the 7-
segment LED are correct.
Page 16-83, Section
16.5.1 (5) (c)
Please consult your local
Mitsubishi service center or
representative, explaining the
details of the problem.
Input module
Input LED
Check for on/off of the LED.
Lit when the input is on.
Off when the input is off.
(Faulty if the reaction is other
than above.)
Manual for the CPU
module
Output module
Output LED
Check for on/off of the LED.
Lit when the output is on.
Off when the output is off.
(Faulty if the reaction is other
than above.)
Page 16-20, Section
16.2.11
Q06CCPU-V Q06CCPU-V-B
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