Errors and Remedies
Section 6-3
6-4
6-3 Errors and Remedies
The following are considered to be main causes of system breakdowns.
•
Noise Interference ....................................... Take appropriate countermeasures against noise.
•
Failures in any of the external devices
•
Failures in the Reader/Writer
•
Failures in the Antenna
•
Failures in the cable
•
Failures in any of the Tags
•
Others
Noise Interference
If the system malfunctions due to noise, refer to the following and take
appropriate countermeasures.
No.
Circumstance of
failure
Probably cause
Remedy
1
An instantaneous voltage drop
due to inrush current to the heavy
load.
Increase the capacity of the power supply and that
of the power cable.
Occurs when a
heavy-duty motor,
transformer, or
capacitor is turned
ON.
Common mode noise caused by
the above cause.
Provide the power through
a 1-to1non-grounded
insulating transformer.
Independently ground the Reader/Writer at a
resistance less than 100 ohm.
2
Occurs irregularly
Noise on power line
Provide the power through a 1-to-1 non-grounded
insulating transformer or noise filter.
Independently ground the Reader/Writer at a
resistance less than 100 ohm.
More than one V720-series
Antenna
When operating more than one V720-series
Antenna, provide a sufficient clearance between
the Antennas.
Refer to the instruction manual for your antenna
for details.
Improvement of grounding
Remedy for power noise
Other
equipmen
Reader/Writer
Reader/Writer
Other
equipment
Reader/Writer
Use twisted
-
pair wires.
Do not install them in parallel
with other power lines.
Line filter
+
24 V
DC
0
V
Repairs are required.
connecting to
a ground of
100 ohm or less
