Furuno GP-170 - ALF-Alert Sentence; ALR-Set Alarm State; APA-Autopilot Sentence a

APPENDIX 1 DIGITAL INTERFACE (IEC 61162-1 EDITION 4 (2010-11))
AP-7
ALF-Alert sentence
ALR-Set alarm state
APA-Autopilot Sentence A
$
**ALF,x,x,x,hhmmss.ss,a,a,a,aaa,x.x,x.x,x.x,x,c--c,*hh<CR><LF>
1 2 3 4 5 6 7 8 9 10 11 12 13
1. Total number of ALF sentences this message (1, 2)
2
. Sentence number (1, 2)
3. Sequential message identifier (0 to 9)
4
. Time of last change (hh=00 to 23, mm=00 to 59, ss.ss=00.00 to 60.99), null
5. Alert category (A=Alert category A, B=Alert category B, C=Alert
category C), null
6. Alert priority (A=Alarm, W=Warning, C=Caution), null when #2 is 2.
7. Alert state (V=Not ACKed, S=Silence, A=ACked, O/U=Resolved, Not ACKed,
N=Normal state), null when #2 is 2.
8. Manufacturer mnemonic code (FEC, null)
9. Alert identifier (999 or 10001 to 10999)
10. Alert instance (null)
11. Revision counter (1 to 99)
12. Escalation counter (0 to 2)
13. Alert text (max. 18 characters)
$
**ALR,Hhmmss.ss,xxx,A,A,c—c,*hh<CR><LF>
1 2 3 4 5
1. Time of alarm condition change, UTC
2
. Unique alarm number (identifier) at alarm source
3. Alarm condition (A=threshold exceeded, V=not exceeded)
4
. Alarm acknowledge state (A=acknowledged, V=not acknowledged)
5. Alarm description text (alphanumeric)
$
--APA,A,A,x.xx,L,N,A,A,xxx,M,c---c,*hh<CR><LF>
1 2 3 4 5 6 7 8 9 10
1. - 2. A for correct position, V for error
3
. XTD value
4
. Direction to steer, L or R
5
. XTD units, N=nautical miles
6
. Status (A=arrival circle entered V=arrival circle not passed)
7
. Status (A=perpendicular passed at waypoint V=perpendicular not entered)
8
. Bearing origin to destination
9
. M=Magnetic, T=True
10. Destination waypoint ID