Periodic Inspection - Mitsubishi MELSEC- Q Q12PHCPU User Manual

10 MAINTENANCE AND INSPECTION

10.2 Periodic Inspection

Item Inspection Item
Ambient
temperature
1 Ambient humidity
Atmosphere
2 Power voltage
Looseness, rattling
3
Adhesion of dirt and
foreign matter
Looseness of
terminal screws
Proximity of
4
solderless terminals
to each other
Looseness of
connectors
5 Battery
10 - 3
The items that must be inspected one or two times every 6 months to 1 year are listed
below.
When the equipment is moved or modified, or layout of the wiring is changed, also
perform this inspection.
Periodic Inspection
Inspection
Measure with a thermometer
and a hygrometer.
Measure corrosive gas.
Measure a voltage across the
terminals of 100/200VAC and
24VDC.
Move the module to check for
looseness and rattling.
Check visually.
Try to further tighten screws
with a screwdriver.
Check visually.
Check visually.
check on the monitor mode of
the GX Developer that SM51 or
SM52 is turned OFF.
Judgment Criteria
0 to 55 °C
5 to 95 %RH 1
Corrosive gas must not be
present.
85 to 132VAC
170 to 264VAC
15.6 to 31.2VDC
The module must be installed
fixedly.
Dirt and foreign matter must
not be present.
Screws must not be loose.
Solderless terminals must be
positioned at proper intervals.
Connectors must not be loose.
(Preventive maintenance)
MELSEC-Q
Remedy
When the sequencer is
used in the board, the
ambient temperature in
the board becomes the
ambient temperature.
Change the power
supply.
Further tighten screws.
If the CPU, I/O, or power
supply module is loose,
fix it with screws.
Remove and clean.
Further tighten.
Correct.
Further tighten connector
fixing screws.
Even if the lowering of a
battery capacity is not
shown, replace the
battery with a new one if
a specified service life of
the battery is exceeded.
10 - 3