6-5SectionMaintenance and Inspections
99
6-4 Dealing with Abnormalities
The following three items are usual causes of problems in the ID Controller.
• Noise. Take countermeasures to deal with noise.
• Breakdowns in external equipment, in which case repairs are required.
• ID Controller breakdown, in which case repairs are required.
6-4-1 Noise
When
system mis-operation occurs due to noise, refer to the following table
to
take appropriate countermeasures to eliminate the influence of noise.
No. Problem conditions Probable cause Action
1 Occurs with large capacity
motor, transformers, or
capacitors when power is
applied.
Instantaneous
voltage drop in
power supply
system due to
large-scale load
surge current
There exists an abnormality in communications between
R/W Heads and DCs. Check communications speed,
distance, and obstacles.
Common mode
noise due to above
cause
Supply power via a 1:1 non-grounded insulated transformer.
Avoid common grounds with other large-scale loads, and
ground the ID Controller independently.
2 Occurs irregularly Noise on power
lines
Supply power via a 1:1 non-grounded insulated transformer
or a noise filter.
3 Mis-operation such as
turning input signal on
when it is off
Induced noise in
input wiring
Lay input signal grounds away from other power lines.
If noise effects are large, insert inside metal line pipes or
use shielded cables.
Improving Ground
Other
equipment
ID
Controller
GR,
Class 3 ground
Other
equipment
ID
controller
Dealing with Power Supply Noise
Power
supply
Noise
filter
ID
Controller
T
wist lines and ensure that
they are not parallel to other
power lines
6-5 Maintenance and Inspections
Daily
and other regular
inspections are required to keep the ID Controller func
-
tions
operating at optimal levels. The ID Controller main sections are configured
from
IC components, and consequently there are almost no consumable items,
but
the following problems may occur due to environmental or operating condi
-
tions.
• Excessive voltage or excessive current causing element deterioration.
• Use
in high ambient temperature locations can cause long term stress leading
to the deterioration of elements.
• Deterioration
of
insulation due to humidity
, dust, or deterioration in connector
connections.
• Corrosive gas causing bad connector connections or corroding elements.
To Next Page
Loading...
Need help?
General
