User guide

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Descriptions and non-contractual illustrations in this document are given as an indication only.
ERCO & GENER reserves the right to make any modification.
Dct_427_01
6 Trouble Shooting
This section of the document describes the problems that may be encountered when using the modem.
6.1 Problem of communication between the modem and the RS232 link (V24)
If the modem does not respond to the AT commands via the RS232 link, see the table below for the possible
causes and the solutions.
Table 14 : Solutions when there is no dialogue between the modem and the RS232 link
If the modem... Check: Action
Returns nothing
Is the modem correctly powered?
Ensure that the modem is connected to an
external regulated power source and supplies a
voltage from 6.5V to 32V (§ 8.2
Electrical
characteristics
).
Is the serial cable connected on
both sides (PC and Modem)?
Check the connection of the serial cable.
Is the serial cable correctly cabled
according to the paragraph
3.2.1.3?
Connect the serial cable according to the table of
le § 3.2.1.3
15-pin Sub D HD connector.
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 of the modem :
Without library (BootLoader)
Speed = 115 200 bps
Data Bits = 8
Parity = none
Stop Bits = 1
Flow control = none
With standard library
Speed = 115 200 bps
Data Bits = 8
Parity = none
Stop Bits = 1
Flow control = none
Application ERCO&GENER – EasePro-Vx
Contact us.
Owner application
speed, data bits, Parity and stop bit according to
your parameters
Is there another application used,
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
and AT+CFUN=15 if a backup is necessary.