EQUIPMENT:  T1200-C 
PUBLICATION:  MARINEC-P-A 
  ISSUE No. & DATE:   3  02/14 
© 2014 Thorn Security Ltd      PAGE 29 of 67 
Registered Company: Thorn Security Ltd.  Registered Office: Dunhams Lane  Letchworth Garden City  Hertfordshire  SG6 1BE 
10.2.6 ZONAL DISABLEMENT Sentence Structure 
This 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 = D (Disabled) 
hhmmss.ss – Time of event = VDROB has no clock so set to 000000 
bb – System indicator of fire detection = FD (Fire Detector) 
dd – Division indicator of fire sensor allocation (1) = Zone Number – Leave Blank 
eee – Division indicator of fire sensor allocation (2) = Loop Number – Leave Blank 
fff – Fire Detector Number = Leave Blank 
g – Condition = A (Activation) or V (Non-activation) 
h – Alarm’s acknowledge state = Leave Blank 
c—c – Alarm’s description text = Alarm description e.g. Zone 1 Disabled 
* – 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 
 
Disablement of zone 3 on panel 1 would generate the following sentence: 
$FRFIR,D,000000,FD,,,,A,,PANEL 01 ZONE 03 DISABLED*38<CR><LF> 
The HEX data is: 
24 46 52 46 49 52 2C 44 2C 30 30 30 30 30 30 2C 46 44 2C 2C 2C 2C 41 2C 2C 50 
41 4E 45 4C 20 30 31 20 5A 4F 4E 45 20 30 33 20 44 49 53 41 42 4C 45 44 2A 33 
38 0D 0A 
Enablement of zone 3 on panel 1 would generate the following sentence: 
$FRFIR,D,000000,FD,,,,V,,PANEL 01 ZONE 03 ENABLED*7A<CR><LF> 
The HEX data is: 
24 46 52 46 49 52 2C 44 2C 30 30 30 30 30 30 2C 46 44 2C 2C 2C 2C 56 2C 2C 50 
41 4E 45 4C 20 30 31 20 5A 4F 4E 45 20 30 33 20 45 4E 41 42 4C 45 44 2A 37 41 
0D 0A