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Device manual CR3105/CR3106
10 Troubleshooting
10.1 GSM network search and troubleshooting
The device can be put into operation without CAN bus, controller or
communication with other software�
As soon as the device is supplied with voltage it automatically starts to search for
a GSM network� CR3105 should have found a network after 30 seconds at the
latest, CR3106 after approx� 60 seconds�
If the network search was successful, the GSM LED is constantly lit green� If this is
not the case there may be the following error sources:
Error source
SIM card
GSM antenna
CAN master
GSM network
RS-232 cable
Avoid change of position in the online mode!
The passing on of a network connection from one radio cell to the next
("handover") during a direct modem connection may lead to faulty
transmissions� So it is possible in some cases that the handover cannot be
carried out correctly and the connection is interrupted�
This may be connected to the fact that no capacities are available on the
"new" transmitter or that the handover is not carried out fast enough and the
contact to the "old" transmitter is interrupted�
Therefore a change of position during a direct modem connection should be
avoided�
44
Possible cause
● not inserted
● jammed
● contacts soiled
● does not support the available GSM network
● PIN no. not correctly configured (→ 7.5.3 GSM parameters)
● not connected
● antenna connector only tightened loosely
● field intensity too low
master resets the device again and again
(to test operate the device without CAN master)
no network available
● The device is connected to the PC via the serial interface and
passes into the configuration mode
(all LEDs flash simultaneously)
● Pin 4 (DSR) of the serial interface is set to logic "high" and the
device is in the update mode
(all LEDs are permanently "on" at the same time)
● The device does not boot if the serial interface is connected to the
PC and the configuration software is not active (all LEDs are "off")
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