Sailor AP5065 - The ALR sentence used in AP5065

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The ALR sentence used in AP5065
The TALKER port sends out an ALR sentence every 5 seconds for each for the connected
and active systems (i.e., systems that show up on the front display of the Alarm Panel). If all
five systems are active, this gives a combined rate of one sentence every second; if no
systems are active, the port does not send anything.
The ALR sentence sent by the AP5065 has the following format:
$aaALR,,n,a1,a2,desc*hh
• <aa> is the talker ID (CS or CD):
- CS for the Inmarsat-C systems.
- CD for the radio systems.
• <n> is the system number (1..5):
- 1: Inm-C 1
- 2: Inm-C 2
- 3: VHF 1
- 4: VHF 2
- 5: MF/HF
• <a1> is the alarm condition (A or V):
- A: DISTRESS or FAULT light active for the system in question.
- V: DISTRESS and FAULT inactive.
• <a2> is the alarm sound’s acknowledge state (A or V):
- A: The alarm sound has been muted (or is inactive).
- V: The alarm sound is active.
• <desc> is the alarm’s description text. It is combined from the following elements:
- The system name (INMC1, INMC2, VHF1, VHF2, MFHF)
- The text “-Fault” is appended if the corresponding FAULT light is on.
- The text “-Distress” is appended if the corresponding DISTRESS light is on.
• <hh> is the checksum as previously described.
This is largely compliant with the ISO/IEC 61162-1 standard where alarm acknowledgement
is interpreted as muting the sound signal.
The example below shows a sequence of sentences from the AP5065. The INMC-2 system
has the DISTRESS light turned on and the alarm sound is on:
$CSALR,,1,V,A,INMC1*7D
$CSALR,,2,A,V,INMC2-Distress*6D
$CDALR,,3,V,A,VHF1*39
$CDALR,,4,V,A,VHF2*3D
$CDALR,,5,V,A,MFHF*53
$CSALR,,1,V,A,INMC1*7D
$CSALR,,2,A,V,INMC2-Distress*6D
$CDALR,,3,V,A,VHF1*39
$CDALR,,4,V,A,VHF2*3D
$CDALR,,5,V,A,MFHF*53
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