Omron NX701-1620, User Manual

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6 - 3
6 Inspection and Maintenance
NX-series CPU Unit Hardware User’s Manual (W535)
6-1
Clean
ing a
nd Ma
inte
nanc
e
6
6-
1-2 Per
iodic Insp
ections
Periodic Inspection Items
No.
Inspec-
tion item
Inspection details Criteria Correction
1 External
power
supply Check for voltage fluctua-
tions at the power supply ter-
minals. The voltage must be
within the allowable
voltage fluctuation
range. Use a voltage tester to check the
power supply at the terminals. Take
necessary steps to bring voltage of
the supplied power to within the
allowable voltage fluctuation range.
2 I/O power
supply Check for voltage fluctua-
tions at the I/O terminals. Voltages must be within
specifications for each
Unit. Use a voltage tester to check the I/O
power supply at the terminals. Take
necessary steps to bring voltage
fluctuations within limits.
3 Ambient
environ-
ment Check the ambient tempera-
ture.
(Inside the control panel if the
Controller is in a control
panel.) 0 to 55°C Use a thermometer to check the
temperature and ensure that the
ambient temperature remains within
the allowed range of 0 to 55°C.
Check the ambient humidity.
(Inside the control panel if the
Controller is in a control
panel.) Relative humidity must
be 10% to 95% with no
condensation. Use a hygrometer to check the
humidity and ensure that the ambi-
ent operating humidity remains
between 10% and 95%.
Make sure that condensation does
not occur due to rapid changes in
temperature.
Check that the Controller is
not in direct sunlight. Not in direct sunlight Protect the Controller if necessary.
Check for accumulation of
dirt, dust, salt, metal powder,
etc. No accumulation Clean and protect the Controller if
necessary.
Check for water, oil, or chem-
ical sprays hitting the Con-
troller. No spray Clean and protect the Controller if
necessary.
Check for corrosive or flam-
mable gases in the area of
the Controller. No corrosive or flam-
mable gases Check by smell or use a gas sensor.
Check the level of vibration
or shock. Vibration resistance
and shock resistance
must be within specifi-
cations. Install cushioning or shock absorb-
ing equipment if necessary.
Check for noise sources near
the Controller. No significant noise
sources Either separate the Controller and
noise source or protect the Control-
ler.
4 Installa-
tion and
wiring Check that each Unit is con-
nected and locked to the next
Unit securely. No looseness Press the connectors together com-
pletely and lock them with the slid-
ers.
Check that cable connectors
are fully inserted and locked. No looseness Correct any improperly installed
connectors.
Check for loose screws in
external wiring. No looseness Tighten loose screws with a Phil-
lips-head screwdriver.
Check crimp connectors in
external wiring. Adequate spacing
between connectors Check visually and adjust if neces-
sary.
Check for damaged external
wiring cables. No visible damage Check visually and replace cables if
necessary.