Appendix 2-14
■ ACK - Acknowledge alert
$--ACK, xxx*hh<CR><LF>
1
1: Unique alert number (identifier) at alert source
HBT - Heartbeat supervision sentence
$GPHBT, x.x,A,x*hh<CR><LF>
1 2 3 4
1: Configured repeat interval
2: Equipment status
A: yes
V: no
3: Sequential sentence identifier, 0-9
4: Checksum
■ ACN - Alert command
$--ACK, hhmmss.ss,aaa,x.x,x.x,c,a*hh<CR><LF>
1 2 3 4 5 6 7
1: Time Null
2: Manufacture mnemonic code: Null or "JRC"
3: Alert identifier
4: Alert instance, 1-999999
5: Alert command
A: acknowledge
Q: request / repeat information
O: responsibility transfer
S: silence
6: Sentence status flag, "C" fixed
7: Checksum
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