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Errors and Remedies
6-3
Errors and Remedies
The following are considered to be main causes of system breakdowns.
· Noise interference
· Failures in peripheral devices
· Failures in the Controller
· Failures in the Antenna
· Failures in the cable
· Failures in the Tag
· Other failures
Noise Interference
Circumstance of failure
Occurs when a heavy-
duty motor, transformer,
or capacitor is turned ON.
Occurs irregularly
Improvement in Grounding
Other
device
Controller
6-4
Take appropriate countermeasures against noise.
Repairs are required.
Repairs are required.
Repairs are required.
Repairs are required.
Repairs are required.
Repairs are required.
If the system malfunctions due to noise, refer to the following and take
appropriate countermeasures.
Probably cause
An instantaneous voltage drop due
to inrush current to the heavy load.
Common mode noise caused by
the above cause.
Noise on power line
More than one V720-series
Antenna
Other
device
Controller
24 VDC
24VDC
Ground at a
Resistance less
100 W
than 100Ω
· Increase the capacity of the power supply and that
of the power cable.
· Provide the power through a 1-to-1 non-grounded
insulating transformer.
· Independently ground the Controller at a resistance
less than 100 W.
· Provide the power through a 1-to-1 non-grounded
insulating transformer or noise filter.
· Independently ground the Controller at a resistance
less than 100 W.
· When operating more than one V720-series
Antenna, provide a sufficient clearance between the
Antennas.
Refer to V720 series Antenna, Tag Manual for details.
Countermeasures Against Noise on Power Line
Line filter
0 V
Section 6-3
Remedy
Controller
Twist the wires and do
Not lay them out in
Parallel to power lines.
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