Saia-Burgess
Controls Ltd.
Manual Modem PCDxx7 Serie│Doc. 26/793; Ed. E2│30.04.2005
Modem parameters and Main Driver functions
2
2-3
Confi guration of the modem parameters
Description of the parameters and their syntax:
Parameter
Description
RESET_COMMAND
This is the AT command, which reset the modem.
The string has to start with
AT
and be finish with
$R .
INIT_COMMAND_1
This string is the initialization command, to configure the mode of
the modem. The string has to start with
AT
and be finish with
$R
. In
this command make sure to disable to ECHO, usually the option is
“
E0
“.
INIT_COMMAND_2
This is the second initialization string, in case the first was too long.
The string has to start with
AT
and be finish with
$R
even if no
initialization command are required.
HANG_UP_COM-
MAND
This is the command to disconnect from the phone line.
The string has to start with
AT
and be finish with
$R
.
MODE_COMMAND
String to switch from transparent mode to modem command mode.
DIAL_PREFIX
This is the dialing prefix, depending if you are using a pulse or tone
dialling. The string has to start with
AT
.
DIAL_NUMBER_x
Those 3 parameters are the 3 phones number, which the PCD can
call to. The string has to be ended with
$R
. The Dial_number will be
added to the Dial_prefix, do not duplicate the option.
DIAL_TEMP
This area is not used, leave it free.
2.1.3 Structure field “MODEM_MESSAGE”
When the modem has executed a command or some call is incoming, the modem
will signal to the PCD the result of the operation with messages. Those messages
could be different between different kind of modem, so they have to be configure
corresponding to the modem used in the project. Also, the choice made in the initiali-
zation command has to be considered, if you choose the numeric or the message
answer.
