User guide

EG_GenPro30e_1006_UG_002_UK Page 26 / 37
Descriptions and non-contractual illustrations in this document are given as an indication only.
ERCO&GENER reserves the right to make any modifications.
6 Trouble Shooting
This section describes the problems that may be encountered when using the modem.
6.1 Communication problem between the modem and the USB link
If the modem does not respond to the AT commands via the USB, link, refer to the table hereunder to see
the possible causes and the solutions.
Table: Solutions when there is no connection between the modem and the USB link
6.2 ERROR" message
The modem returns a message "ERROR" (in response to an AT command) in the following cases:
▪ The COM port is not directed to the GenPro 30e modem but to another modem. Enter ATI, and the
response must be Manufacturer: Sierra.... Any other response indicates a dialog with another modem. In
this case, check the COM port used in the Hyperterminal.
▪ The syntax of the AT command is incorrect: check it (see the "Commands List" document of ERCO
& GENER),
▪ The syntax of the AT command is correct, but transmitted with wrong parameters (see the
"Commands List" document of ERCO & GENER).
If the modem... Check : Action
Is the modem correctly powered? Ensure that the modem is connected to an
external regulated power source and supplies a
tension from 5.5V to 32V (§ 8.2.1).
Is the USB cable connected at
both ends (PC and Modem)?
Check the connection of the USB cable.
Returns nothing
Is the USB cable correctly cabled
according to the paragraph
3.2.1.3?
Connect the USB câble rding to the table of
paragraph3.2.1.3.
Returns nothing or
random characters
Is the communications terminal
correctly configured on the PC?
Ensure that the configuration of the
communication terminal corresponds with the
one of the modem.
Factory configuration :
Speed = 115200 bps
Data bits = 8
Parity = sans
Stop bits = 1
Flow control = hardware
Is there another application
creating a conflict during the
access to the communication
port?
Close the conflicting application.
Is the modem without echo and
without message reporting?
Send the command ATE1Q0 followed by AT&W
if a backup is necessary.