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Maintenance and Inspection
5-7
Maintenance and Inspection
1,2,3...
Items of Inspection
No.
Item
1
Supply voltage fluctuation Voltage measured at terminal
2
Environments:
(a) Temperature
(b) Humidity
(c) Vibration, shock
(d) Dust
(e) Corrosive gas
3
Condition of pane:
(a) Is ventilation good?
(b) Is packing damaged
in the sealed panel?
4
I/O power
(a) Voltage fluctuation
(b) Ripple
5
Mounting condition
6
Battery life of DC
7
Error logging
To always keep the ID Controller in the best condition, the Controller should
be inspected daily or periodically. Although the ID Controller consists of semi-
conductor devices, without a limited life, the following troubles may occur
depending on the environments and conditions in which the ID Controller is
operated:
1. Degradation of elements due to overcurrent and overvoltage.
2. Degradation of elements due to long-term stress, if the ID Controller is
used at high temperatures.
3. Degradation of insulation and faulty connector contact of due to humidity
and dust.
4. Faulty connector contact or corrosion due to corrosive gas.
Particulars
block within rated range?
Momentary power failure fre-
quently occurs? Abrupt rise in
supply voltage occurs?
(a), (b) Must be within rated
values
(c) Is the Controller subject to
vibration or shock from sur-
rounding machines?
(d) Does dust or foreign object
collect on the Controller?
(e) Are the metallic parts dis-
colored or corroded?
(a) Natural ventilation, forced
ventilation, and air condition-
ing are adequate?
(b) Are panel packings loose
or damaged?
Is voltage measured at termi-
nal block of each I/O within
rated level?
(1) Is each device fixed
securely?
(2) Are connectors inserted
securely?
(3) Aren't screws of terminal
block loose?
(4) Is the wiring damaged?
(5) Are the communications
specifications between DC
and R/W Head satisfied?
Check the DC date of produc-
tion.
Check error.
Criteria
Supply voltage must be within
rated range.
Supply voltage must be within
rated range.
(a) –10° to +55°C
(b) 35 to 85% RH.
(c) Must be in specified range.
(d) Must be free from dust and
foreign objects.
(e) Must be free from discolor-
ation and corrosion.
(a) Good ventilation is essen-
tial. Temperature in panel
must be –10° to +55°C.
(b) Must be free from dam-
age.
Must be within rated range.
Must be tightened.
Must be locked and tightened
with screws.
Must not be loose.
Must be free from damage.
Must be within rated range.
Must be within guaranteed
period.
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Section 5-7
Remarks
Tester
Power analyzer
Thermometer,
hygrometer
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Tester, oscilloscope
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63
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