5-7
Section
Maintenance and Inspection
60
5-7
Maintenance and Inspection
To always keep the ID Controller in the best condition, the Controller should be
inspected daily or periodically. Although the ID Controller consists of semicon-
ductor devices, without a limited life, the following troubles may occur depending
on the environments and conditions in which the ID Controller is operated:
1, 2, 3...
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.
Items of Inspection
No.
Item
Particulars
Criteria
Remarks
1
Supply voltage
fluctuation
Voltage measured at terminal
block within rated range?
Supply voltage must be
within rated range.
Tester
Momentary power failure
frequently occurs? Abrupt
rise in supply voltage occurs?
Supply voltage must be
within rated range.
Power analyzer
2
Environments:
Thermometer,
hygrometer
(a) Temperature
(a), (b) Must be within rated
values
(a) –10
°
to +55
°
C
(b) Humidity
(b) 35 to 85% RH.
(c) Vibration, shock
(c) Is the Controller subject to
vibration or shock from
surrounding machines?
(c) Must be in specified
range.
(d) Dust
(d) Does dust or foreign
object collect on the
Controller?
(d) Must be free from dust
and foreign objects.
(e) Corrosive gas
(e) Are the metallic parts
discolored or corroded?
(e) Must be free from
discoloration and corrosion.
3
Condition of pane:
(a) Is ventilation good?
(a) Natural ventilation, forced
ventilation, and air
conditioning are adequate?
(a) Good ventilation is
essential. Temperature in
panel must be –10
°
to +55
°
C.
---
(b) Is packing damaged
in the sealed panel?
(b) Are panel packings loose
or damaged?
(b) Must be free from
damage.
4
I/O power
(a) Voltage fluctuation
(b) Ripple
Is voltage measured at
terminal block of each I/O
within rated level?
Must be within rated range.
Tester, oscilloscope
5
Mounting condition
(1) Is each device fixed
securely?
Must be tightened.
---
(2) Are connectors inserted
securely?
Must be locked and tightened
with screws.
---
(3) Aren’t screws of terminal
block loose?
Must not be loose.
---
(4) Is the wiring damaged?
Must be free from damage.
---
(5) Are the communications
specifications between DC
and R/W Head satisfied?
Must be within rated range.
---
6
Battery life of DC
Check the DC date of
production.
Must be within guaranteed
period.
---
7
Error logging
Check error.
---
---