T1200
MARINEC-P-A
3 02/14
PAGE 30 of 67
10.2.7 STATUS MESSAGE Sentence Structure
This message is transmitted every 10 seconds and is primarily used to tell the VDR that the VDROB is able to
communicate with it. The sentence is similar to that for fire and takes the following form:
$ttfff,a,hhmmss.ss,bb,dd,eee,fff,g,h,c—c*hh<CR><LF>
$ – start of sentence
tt – Talker Identifier = FR (Fire detection system)
fff – Sentence Formatter = FIR (Fire Detection)
, – Field Separator
a – Message Type = S (Status)
hhmmss.ss – Time of event = VDROB has no clock so set to 000000
bb – System indicator of fire detection = OT (Other)
dd – Division indicator of fire sensor allocation (1) = Panel Number – Tyco Alpha Encoding format:- AA = 01,
AB = 02, up to AJ = 10, then BA = 11 up to BE = 15
(Max value JI=99)
eee – Division indicator of fire sensor allocation (2) = Leave Blank
fff – Fire Detector Number = Number of zones in Alarm, e.g. 032
g – Condition = Leave Blank
h – Alarm’s acknowledge state = Leave Blank
c—c – Alarm’s description text = Description e.g. Panel 01 ZONES IN ALARM = 32
* – Indicates next two characters are the checksum
hh – Checksum (XOR of all bytes including commas but excluding $ and *)
<CR> – Carriage Return character = HEX 0D
<LF> – Line Feed character = HEX 0A
For example, 8 zones in alarm on panel 1 would generate the following sentence:
$FRFIR,S,000000,OT,AA,,008,,,PANEL 01 ZONES IN ALARM = 28*6E<CR><LF>
The HEX data is:
46 52 46 49 52 2C 53 2C 30 30 30 30 30 30 2C 4F 54 2C 41 41 2C 2C 30 30 38 2C
2C 2C 50 41 4E 45 4C 20 30 31 20 5A 4F 4E 45 53 20 49 4E 20 41 4C 41 52 4D 20
3D 20 30 38 2A 32 38 0D 0A
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