Device Description HG G-98780-A | English, Revision 16 | Date: 15.07.2021
40
Chapter 8 – Troubleshooting
8
Troubleshooting
The following table contains a list of errors that might occur. For each error, a symp
-
tom description is given. In the third column you will find a description of how to lo
-
cate 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.
Table 22
Troubleshooting
Error
Possible cause
Diagnosis/ Correction
No system function
Even though a transponder
is located within reception
range, there is not serial out
-
put
–
Power supply is not sufficient
Measure the voltage at the respec
-
tively labeled clamps in the clamp
-
ing case.
No contact is possible, only
unintelligible characters 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 sys
-
tem monitor.
Inaccurate values at low
temperature.
1.
System needs a certain warm-up
time in order to operate at suffi
-
cient accuracy in low ambient
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
heating).
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
