NSR Marine NGR-1000, User Manual

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NGR-1000/NGR-3000 USER MANUAL
NGR-1000/NGR-3000 UM.E 20190331-04
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ACN – Alert command
$--ACN,hhmmss.ss,aaa,x.x,x.x,c,a*hh <CR><LF>
| | | | | |
| | | | | +--------------------------------- 6
| | | | +---------------------------- 5
| | | +-------------------------- 4
| | +------------------------- 3
| +----------------------- 2
+---------------------------- 1
1. Time (see Note 1)
2. Manufacturer mnemonic code (see Note 2)
3. Alert Identifier (see Note 3)
4. Alert Instance, 1 to 999999 (see Note 4)
5. Alert command, A, Q, O or S (see Note 5)
6. Sentence status flag (see Note 6)
NOTE 1: Release time of the alert command. (e.g. for VDR purposes), optional can be a null
field. Sender is allowed to use all alternatives defined in Table 5 Field type
summary. Receiver is allowed to ignore content of this field. If receiver does not
ignore this field it should support all alternatives defined in Table 5 Field type
summary.
NOTE 2: Used for proprietary alerts defined by the manufacturer. For standardized alerts this
should be a null field.
NOTE 3: The alert identifier is unique within a single alert source. The alert identifier is a
variable length integer field of maximum 7-digit integer. It identifies the type of the
alert e.g. a “lost target” alert. Standardized alerts use unique alert identifiers
described in equipment standards. Number range 10000-9999999 is reserved for
proprietary alerts. Alert Identifier examples: “001”, “2456789”, “245” .
NOTE 4: The alert instance identifies the current instance of an alert to distinguish alerts of
the same type (Alert identifier) and from the same source (e.g. dangerous target).
Alert instance is maximum 6-digit integer from 1 to 999999. The number of alert
instance can be freely defined by the manufacturer as long as it is unique for one
type of alert (alert identifier). It is not permitted to modify the alert instance within a
life cycle of a distributed alert (from ‘active & unacknowledged’ state until
‘normal’ state is reached). It can be also a null field, when there is only one alert of
that type.
NOTE 5: This should not be null field
acknowledge : A
request / repeat information : Q
responsibility transfer: O
silence : S
NOTE 6: This field should be “C” and should not be null field. This field indicates a
command. A sentence without “C” is not a command.