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Section 9: Communication Protocol with Central Station Computer
Basic protocol
1RRLssssAAAAAAsXssYY[DC4]
Where, 1
: Protocol number.
RR
: Receiver number.
L
: Line number.
s
: Space Character.
AAAAAA : Account Code, usually 4 digits with 2
leading spaces.
X
: Event Code. See Table below.
YY
: Zone Number or User Number.
[DC4]
: Terminator, 14 Hex.
Event Code Table
A
Alarm
B
Bypass
C
Closing
O
Opening
R
Restore
T
Trouble
9.1.4 S
upervisory Heartbeat Signal Protocol
1011sssssssssss@ssss[DC4]
Where,
s
: Space Character.
@
: Supervisory Signal.
[DC4]
: Terminator, 14 Hex.
This signal is used to supervise the communication between
the receiver and the computer. It is sent to the computer
about every 30 seconds, programmable on the receiver.
The computer should acknowledge this signal with an [ACK].
It is recommended to have this signal running.
9.1.5 Clock Signal Protocol
1RRLssssAAAAAAsXGYYYHH:MM:SS-dd/mm[DC4]
3RRLssssAAAAAAXXYYYYHH:MM:SS-dd/mm[DC4]
Where, HH
: Hour.
MM
: Minute.
SS
: Second.
dd
: Day.
mm
: Month.
And the other codes are of the same definition as in the
previous signal protocols. The supervisory heartbeat signal
can also be used along with this protocol, but the structure
remains unchanged.
Ask Sur-Gard Technical Support for an information sheet
when using the MLR2-DV with one of the following software
packages:
• SIMS II
• SIMS CSM
• SIS
• M.A.S.
• Mentor
9.1 Protocols
The Sur-Gard MLR2-DV receiver sends the following protocol
to report signals to the central station computer via the
RS-232 port.
9.1.1 Data Byte Protocol
The Sur-Gard receiver uses 1200 baud rate, 1 start bit, 7
data bits, 1 even parity bit, and 1 stop bit structure, to
transmit and receive signals. The above protocol can be
programmed on the receiver by the central station operator
to enable different configurations.
9.1.2 Acknowledgement of the Signal
The Sur-Gard receiver requires an acknowledge signal [ACK]
from the computer software within a certain programmable
time for each message sent. The waiting period for the
[ACK] can be adjusted up to 10 seconds. Failure to receive
the [ACK] will result in the re-transmission of the same signal
three more times before giving up. In case of communication
failure with the computer, the Sur-Gard receiver can store
up to 256 messages in its Static RAM memory. When
communication is resumed, these messages will be
automatically sent to the computer.
9.1.3 DVL2A-CSL Communication Formats
The following is a list of formats available for the CSL-X28
version:
Ademco High Speed protocol
8RRLAAAAAAsCCCCCCCCsA[DC4]
8RRLAAAAAAsCCCCCCCCsCCCCCCCCA[DC4]
Where, 8
: Protocol number
RR
: Receiver number
L
: Line number
AAAA
: Account code (may be 4,5 or 6)
s
: Space
C
: Zone status (8 or 16)
A
: Auxiliary Zone
[DC4]
: Terminator, 14 Hex.
Channel codes available:
1: New event
2: New opening
3: New restore
4: New closing
5: Normal
6: Previous reported event still in effect
0: New Trouble
Auxiliary zones available:
7: Zone status report in previous 8 zones
8: New low battery
9: Test report
note that any other value will be taken as 7.
• Monitor
• Microkey Central-1
• ABM
• Alarm Soft
• Apropos STA
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