Copyright © 2005
– 2021 R. STAHL TRANBERG AS. All rights reserved. Page 18 of 38
Section 4.03
SCADA Gateway
In order to receive commands from the outside of the Commander system, a SCADA
gateway module may optionally be installed in the Master CPU unit. This unit will listen
to incoming commands and issue these onto the internal network when queried by the
Master CPU. This will allow for remote control of the system and panel.
The SCADA gateway accepts two types of input messages, 1) panel control messages
according to a proprietary Tranberg protocol, and 2 ) alarm silence messages according
to NMEA-0183 ALR and ACK messages.
Electrical interface
Baud rate: 38.400 bps
Data bits: 8N1
Electrical: Isolated RS-422, input only
Panel control messages
The output string is a proprietary NMEA-0183 structure with the following setup:
1
2
3
4
5
6
7
$PTRA
)
5
1
*
1
6
$
P
T
R
A
P
a
n
e
l
B
u
tt
o
n
S
ta
te
*
C
h
e
c
k
s
u
m
M
S
B
C
h
e
c
k
s
u
m
L
SB
Example:
$PTRA,),5,1*16
Packet length: 10 characters (normal), plus commas, carriage return and new line.
Explanations:
$PTRA: A fixed start of the telegram (Proprietary TRAnberg)
Comma: A comma sign (,)
Asterix: An asterix sign (*)
Panel: Panel address
Button: Button number
State: Button state
Checksum is a 2 digit ASCII hex checksum, MSB first.
Checksum MSB: The MSB of the checksum (e.g. 1 if the ch ecksum is 16).
Checksum LSB: The LSB of the checksum (e.g. 6 if the checksum is 16).
