6 MAINTENANCE AND INSPECTION
6.1 Daily Inspection
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6 MAINTENANCE 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.
When using the C Controller module, refer to the following.
MELSEC iQ-R C Controller Module User's Manual (Startup)
6.1 Daily Inspection
This section describes items that must be inspected daily.
Item Inspection Item Inspection method Judgment criteria Corrective action
1 Mounting of the
base unit
Loose Check that mounting screws
are not loose and the cover is
not dislocated.
The screws and cover must be
fixed.
Retighten the screws.
2 Mounting of the
module
Loose Check that the module is
mounted and the module fixing
hook is fixed securely.
The module must be mounted
and the module fixing hook
must be fixed.
Fix the module fixing hook
securely.
3 Connection status Terminal screw
loosening
Check for the terminal screw
loosening.
The terminal screws must not
be loose.
Retighten the terminal screws.
Clearance between the
solderless terminals
Check for the clearance
between the solderless
terminals.
The proper clearance must be
provided between solderless
terminals.
Provide the proper clearance.
Connector loosening Check for the cable connector
loosening.
The cable connector must not
be loose.
Connect the connector with no
loosening securely.
4 LED status POWER LED (power
supply module)
Check that the LED is on. The LED must be on. When the judgment criteria is
not satisfied, refer to the
following and take the
corrective action.
User's Manual
(Application) for the module
used
READY LED and RUN
LED
Check that the LED is on. The LED must be on.
ERROR LED, ERR LED,
P ERR LED, and L ERR
LED
Check that the LED is off. The LED must be off.
BATTERY LED (CPU
module)
Check that the LED is off. The LED must be off.
USER LED (CPU
module)
Check that the LED is off. The LED must be off.
I/O indicator LED (I/O
module)
Check that the LED is on or off. The LED turns on when I/O
signals are on. The LED turns
off when I/O signals are off.
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