5-2
Section 5 Maintenance and Inspection
5-1-3 Inspection items
When inspecting the equipment, use the following inspection table.
Inspection item Inspection contents Criteria Inspection method
Main unit
Conrmation of PWR/BAT, RUN/MEM, ALM LED
LED must not be
blinking.
Visual inspection
Main unit
Expansion unit
Power supply
Voltage
Is the voltage within the normal range when
measured at a terminal block ?
AC:
100V: 85 to 132V
240V: 170 to 264V
DC:
24V: 20.4 to 28.8V
Voltmeter
Voltage
uctuation
Are there frequent momentary power failures or
abrupt voltage rises or drops ?
Voltage uctuations
must be within the
above range.
Oscilloscope
Ambient
environment
Temperature
Is the temperature within the specied range ?
(temperature in the panel when installed inside the
panel)
0 to +55°C Max./min.
thermometer
Humidity
Is there condensation or extreme discoloration or
corrosion ?
20 to 95%RH
Visual inspection,
hygrometer
Vibration
Is there any vibration ?
There must be no
vibration.
Check by touching
Dust
Is there any dirt or other foreign matter ?
There should be no
dirt or other matter.
Visual inspection
Installation status
Are all modules mounted securely ? No looseness Visual inspection
Are there any loose screws on the external wiring
terminals ?
No looseness Screwdriver
Are cable connectors inserted securely ? No looseness
Visual inspection,
Screwdriver
Are any external wiring cables damaged ?
No abnormal
appearance
Visual inspection
Spare parts
Is the designated quantity available ?
Are storage conditions appropriate ?
See the inspection
records.
Program
Were any errors detected through verication ?
Is the source program stored appropriately?
There must be no
errors.
Program verication
Notes:
1) If a fault occurs, replace the entire faulty unit or board. For this replacement, a minimum amount of space components
should be provided.
2) For spare main units and expansion units, power on once every six months.
(To prevent discharging of aluminum electrolytic capacitor in the power supply module)
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