Omron CP1E-E10DT-A, User Manual

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7-3
7 Maintenance and Inspection
CP1E CPU Unit Hardware User’s Manual(W479)
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7-1-3 Inspection and Maintenance
No.
Inspection
points
Inspection Criteria Remedy
1 Power sup-
ply voltage Check for voltage fluctuations
at the power supply terminals. Allowable voltage
range
AC power supply:
85 to 264 VAC
DC power supply:
20.4 to 26.4 VDC Use a voltage tester to check the
power supply at the terminals. Take
necessary steps to bring voltage fluc-
tuations within limits.
2 I/O power
supply Check for voltage fluctuations
at the I/O terminals. Voltages must be
within I/O specifica-
tions for each Unit. Use a voltage tester to check the
power supply at the terminals. Take
necessary steps to bring voltage fluc-
tuations within limits.
3 Ambient
environment Check the ambient tempera-
ture. (Inside the control panel
if the PLC is in a control
panel.) 0 to 55°C Use a thermometer to check the tem-
perature and make sure that the
ambient temperature remains within
the allowed range of 0 to 55ºC.
Check the ambient humidity
(inside the control panel if the
PLC is in a control panel). Relative humidity
must be 10% to
90% with no con-
densation. Use a hygrometer to check the opera-
tion humidity and ensure that the
ambient humidity remains between
10% and 90%.
Make sure that condensation does
not occur due to rapid changes in
temperature.
Check that the PLC is not in
direct sunlight. Not in direct sun-
light Protect the PLC if necessary.
Check for accumulation of
dirt, dust, salt, metal filings,
etc. No significant accu-
mulation Clean and protect the PLC if neces-
sary.
Check for water, oil, or chemi-
cal spray. No spray on the
PLC Clean and protect the PLC if neces-
sary.
Check for corrosive or flam-
mable gases in the area of the
PLC. No corrosive or
flammable gases Check by smell or use a sensor.
Check the level of vibration or
shock. Vibration and shock
must be within
specifications. Install cushioning or shock absorbing
equipment if necessary.
Check for noise sources near
the PLC. No significant noise
sources Either separate the PLC and noise
source or protect the PLC.
4 Installation
and wiring Check that the Option Boards
and cable connectors are fully
inserted and locked. No looseness Correct any improperly installed con-
nectors.
Check for loose screws in
external wiring. No looseness Tighten loose screws with a Phillips
screwdriver.
Check crimp connectors in
external wiring. Adequate spacing
between connec-
tors Check visually and adjust if neces-
sary.
Check for damaged external
wiring cables. No damage Check visually and replace cables if
necessary.