JRC JFE-400, Instruction Manual

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10.Appendix
10-10
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 a 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
and unacknowledged’ state until ‘normal’ state is reached). It can be also a null field, when
there is only one alert of that type.
5) Refused Alert Command: Indicates refused “Alert command” of corresponding ACN
sentence. This should not be a null field.
acknowledge: A
request / repeat information: Q
responsibility transfer: O
silence: S
11) HBT – Heartbeat supervision sentence
$--HBT,x.x,A,x*hh<CR><LF>
1 2 3
1: Configured repeat interval 1)
2: Equipment status 2)
3: Sequential sentence identifier 3)
Note;
1) Configured autonomous repeat interval in seconds. This field should be set to NULL in
response to a query if the query response feature is supported.
2) Equipment in normal operation A = yes, V = no
This field can be used to indicate the current equipment status. This could be the result of
an built-in integrity testing function.
3) The sequential sentence identifier provides a message identification number from 0 to 9
that is sequentially assigned and is incremented for each new sentence. The count resets to
0 after 9 is used.
12) DDC – Display dimming control
$--DDC,a,xx,a,a*hh<CR><LF>
1 2 3 4
1: Display dimming preset 1)
2: Brightness percentage 00 to 99 2)
3: Color palette 3)
4: Sentence Status Flag 4)
Note;
1) The display dimming preset field contains an indicator that may be associated with a preset
dimmed level on an electronic device.
D = Day time setting
K = Dusk setting
N = Night time setting
O = Backlighting off setting
Actual display brightness levels for the display dimming preset indicators above are
dependent upon the capabilities provided by the manufacturer of the equipment. Proper use
of this field would be as follows. A device provides the operator or user with the ability to set
a brightness level to be associated with day, dusk night, etc. Upon receipt of the DDC
sentence, the device would switch its display brightness to the preset value the operator