User guide

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Description 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 various problems and their solutions that may be encountered when using the
modem.
6.1 RS232 (V24) Communication problem
If the modem does not respond to any of the AT commands via the RS232 then refer to the table below for a
list of possible causes and solutions.
Table: possible causes and solutions for RS232 communication problems
If the modem... Check Action
Returns nothing Is the modem correctly powered? Ensure that the modem is connected to an
external regulated power source (5.5V to 32V
DC). See chapter 8.2.1 Power supply.
Is the serial cable connected at
both ends (PC and Modem)?
Verify the connexion of the serial cable.
Is the serial cable correctly cabled
according to the table in chapter
3.2.1.3 15-pin Sub HD female
connector?
Cable the serial cable according to the table in
chapter 3.2.1.3 15-pin Sub HD female
connector.
Returns nothing or
random characters
Is the communications terminal
correctly configured on the PC?
Ensure that the terminal configuration
corresponds to that of the modem.
Factory configuration :
Speed = 9600 bps
Data bits = 8
Parity = none
Stop bits = 1
Flow control = hardware
Is there another application using
the same port thus creating a
conflict?
Close the conflicting application.
Is the modem echo deactivated
and without message reporting?
Enter the command ATE1Q0 followed by AT&W
if a backup is required.
6.2 "ERROR" message
The modem returns the message “ERROR” (in response to an AT command) in the following cases :
• The COM port is not directed to the GenPro 18e but to another modem. Enter the command
ATI1. The response should be Enabler_III.... All other responses indicate a dialog with another
modem. Verify the COM port used in the communications application.
• The syntax of the AT command is incorrect. Re-enter the command. (Refer to the ERCO &
GENER "Commands List")
• The syntax of the AT command is correct, but with incorrect parameters :