UniMod GSM-4
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8.4
Automatic Baud Rate Adaption
Using the
“Automatic Baud Rate Adaption” functionality the UniMod GSM-4
can determine automatically the baud rate that is used by the connected
meter (al
ternatively to “SMS Function”). This is only possible with VDEW2
meters that can be read using the IEC1107 (IEC62056-21) protocol. The
data format (7E1, 8N1 or 8E1) must be the same.
If triggered the meter is accessed using different baud rates between 300
and 19200 Bd. When the meter answers the successful baud rate is saved.
This baud rate is the restored after each power outage.
In order to use
“Automatic Baud Rate Adaption” the jumpers UE and UA at
the UniMod GSM-4 must be set as shown below to use the control input UE
(terminal 8/GND and 9/UE):
Control input enabled: Function UE/UA
U E
D T R
U A
D C D
Example:
