UniMod GSM-4
25
8.5
Temporary Baud Rate Switching
Optionally the baud rate of the electrical interface can be switched while a
request is running, without the necessity to hang up the connection. This al-
lows to read meter with different baud rates and/or data formats (7E1, 8N1
etc.).
The command for switching is:
{[%]}=x,y
*
The first number (
x
) defines the baud rate, the second one (
y
) the data
format. The modem switches after the
*
character is recognized without
acknowledgement. These parameters are possible:
x =
0: 300 Baud
1: 600 Baud
2: 1200 Baud
3: 2400 Baud
4: 4800 Baud
5: 9600 Baud
6: 19200 Baud
y =
0:
7E1
1:
8E1
2:
8N1
Example: {[%]}=5,0
*
:= 9600 Baud, 7E1
{[%]}=3,1
*
:= 2400 Baud, 8E1
After hang-up (change to OFFLINE state: DCD-LED off) the saved (old)
baud rate and data format is restored (for GPRS connection after a reset
only).
►
The character sequence {[%]} has been chosen because it is quite ex-
otic and should never appear in regular communication to meters.
Note:
For correct working set the data format at the UniMod GSM-4 to
8N1
.
Summary of Contents for UniMod GSM-4
Page 4: ...UniMod GSM 4 4 ...
