MDC-7000/7900 Series
Chapter 11 Appendix
0093169010-10
11-19
Alarm and alert handling
ALF
Alert sentence
Time of last
Check sum
change
Alert text
Escalation counter, 0 to 9
Sequential
Revision counter, 1 to 99
message
Alert instance, 1 to 999999
identifier, 0 to 9
Alert identifier
Sentence
Manufacturer mnemonic code
number, 1 to 2
Alert state, A, S, N, O, U or V**
Total number of ALF sentences
Alert priority, E, A, W or C*
for this message, 1 to 2
Alert category, A, B or C
Note** Alert state
V=Active-Unacknow ledge
Note* Alert priority
S=Active-Silenced
E=Emergency Alerm (for use w ith Bridge Alert Management)
A=Active-Acknow ledge or active
A=Alarm
O=Active-Responsibility transferred
W:Warning
U=Rectified-Unacknow ledge
C=Caution
N=Normal
ALC
Cyclic alert list
ALC,
Check sum
Additional Alert entries
Revision counter Alert entry 1
Alert instance
Alert identifier
Manufacturer mnemonic code
Number of alert entries
Sequential message identifier, 00 to 99
Sentence number, 01 to 99
Total number of sentences for this message, 01 to 99
ARC
Alert command refused
c*hh<CR><LF>
Relese time
Check sum
Note*
Refused alert command, A, Q, O or S*
A: Acknowledge
Alert instance, 1 to 999999
Q: Request / repeat information
Alert identifier
O: Responsibility transfer
Manufacturer mnemonic code
S: Silence
ALR
Set alarm state
Time of alarm
Check sum
condition
Alarm's description text
change, UTC
Alarm's acknow ledge state, A=acknow ledged
V=unacknow ledged
Alarm condition (A=threshold exceeded, V=not exceeded)
Unique alarm number (identifier) at alarm source
ACN
Alert command
a*hh<CR><LF>
Relese time
Check sum
Sentence status flag: "C"
Alert command, A, Q, O or S*
Note* Alert command
Alert instance, 1 to 999999
A: Acknow ledge
Alert identifier
Q: Request / repeat information
manufacture mnemonic code
O: Responsibility transfer
S: Silence
*hh<CR><LF>
$ -- ACN, hhmmss.ss,
aaa,
x.x, x.x, c,
x.x, x.x,
$ -- ALR, hhmmss.ss,
xxx,
A, A, c---c
aaa,
x.x, x.x, x.x *hh<CR><LF>
$ -- ARC, hhmmss.ss,
aaa,
x.x,
aaa,
x.x, x.x, x.x,
……,
x.x, x.x, x, c---c *hh<CR><LF>
$ --
xx, xx, xx,
hhmmss.ss, a, a, a,
aaa,
x.x,
$ -- ALF, x, x, x,
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