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4. Periodic Inspection
4. Periodic Inspection
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 implement this inspection.
Item Inspection item Inspection Criterion Action
1
Ambient environment
Ambient temperature
Measure with a
thermometer and a
hygrometer.
Measure corrosive gas.
0 to 55 °C (32 to 131 °F)
When the controller is
used in the board, the
ambient temperature in
the board becomes the
ambient temperature
Ambient humidity 5 to 95 % RH
Atmosphere No corrosive gases
2 Power voltage
Measure a voltage across
the terminals of 100/
200VAC and 24VDC.
85 to 132VAC
Change the power supply.170 to 264VAC
15.6 to 31.2VDC
3
Installation
Looseness, rattling
Move the module to check
for looseness and rattling.
The module must be
installed solidly.
Retighten the screws.
If the CPU modules,
Motion modules, I/O
modules, or power supply
modules are loose, fix it
with screws.
Adhesion of dirt and foreign
matter
Check visually.
Dirt and foreign matter
must not be present.
Remove and clean.
4
Connection
Looseness of terminal screws
Try to further tighten
screws with a screwdriver.
Screws must not be loose.
Retighten the terminal
screws.
Proximity of solderless
terminals to each other
Check visually.
Solderless terminals must
be 4 positioned at proper
intervals.
Correct.
Looseness of connectors Check visually.
Connectors must not be
loose.
Retighten the connector
fixing screws.
5 Battery
Check the 7-segment LED
at the front side of CPU
module.
Must be turned OFF "BT1"
or "BT2" display.
Even if the lowering of a
battery capacity is not
shown, replace the
battery with a new one if a
service life time of the
battery is exceeded.
Check the length of term
after purchasing the battery
Must not be used more than
5 years.
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