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SECTION 6
Errors and Countermeasures
RFID System
User's Manual
SECTION 6
Troubleshooting
Errors and Countermeasures
The four main causes of problems that may occur in the FL Remote ID are as follows:
■ Noise Interference
If the system malfunctions due to noise, refer to the following table and take appropriate countermea-
sures.
No. Occurrence of fault Possible cause Countermeasure
1
Occurs when a heavy-duty motor,
transformer, or capacitor is turned ON.
An instantaneous voltage drop due to
inrush current to the heavy load.
Increase the capacity of the power
supply and the size of the power cable.
Common mode noise as a result of the
above cause.
• Provide the power through a 1-to-1
non-grounded insulating transformer.
• Do not use the same ground as other
large-capacity devices. Indepen-
dently ground the Controller at a
resistance of 100 or less. (See
figure1.)
2 Occurs irregularly. Noise on power line
Provide the power through a 1-to-1
non-grounded insulating transformer or
noise filter. (See figure 2.)
3
Malfunction such as input signal turn-
ing ON when it should be OFF.
Inductive noise on input line
• Separate input signal from power
lines.
• If there is a lot of noise interference,
put the input line inside a grounded
metal conduit or use shielded cable.
• Noise interference· · · · · · · · · · · · · Take adequate countermeasures against noise.
• External device failure
• FL Remote ID failure
• Others
· · · · · · Repairs are required.
1. Improvement in Grounding
2. Countermeasures Against Noise on Power Line
Noise filter
Twist the wires and do
not lay them out
parallel to power lines.
Other
device
FL Remote
ID
Other
device
FL Remote
ID
Ground at a
resistance less
than 100 Ω.
FL Remote
ID
Power
supply
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