Troubleshooting
Englisch, Revision 14, Date: 07.02.2017
44
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Troubleshooting
The following table contains a list of errors that might occur. For each error, a symptom
description is given. In the third column you will find a description of how to locate and
possibly correct the error.
If you should not be able to correct an occurring error, please use the table to locate
the source of the error as exactly as possible (nature of malfunction, at which point in
time did the error occur, etc.) before consulting us.
Error
Possible cause
Diagnosis/ Correction
No system function
Even though a transpon-
der is located within
reception range, there is
not serial output
-
Power supply is not sufficient
Measure the voltage at the respec-
tively labelled clamps in the clamp-
ing case.
No contact is possible,
only unintelligible char-
acters are sent.
1. RS 422 T+(R+) exchanged with
RS 422 T- (R-) by mistake
2. Signal ground not connected, a
too high potential difference
between antenna and receiver.
3. Incorrect setting of transfer
parameters.
4. Incorrect transfer procedure
selected.
1. Check the connections
2. Connect signal ground
3. Select only 9600 or 19200 baud,
8 bit, even parity.
4. Select the correct procedure,
etc. with the PC and the system
monitor.
Inaccurate values at low
temperature.
1. System needs a certain warm-
up time in order to operate at
sufficient accuracy in low ambi-
ent temperature.
2. Insufficient heating perfor-
mance, loose cable connections
Wait until the system has warmed
up (ca. 60 minutes at -20
o
C).
Measure the voltage 24 V at the
corresponding clamps (+ 24 V heat-
ing).
No positioning pulse.
1. Transponder defective
2. Loose cable connections
3. Wrong reading distance
4. Transponders are located out-
side the reading area of the
antenna during the antenna
crossing
5. Antenna defective
Check the transponder (e. g. with
the hand-held reader) and its loca-
tion
Table 22
Troubleshooting