DCT Antares SB, Руководство пользователя

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4.5. *EVENT MACHINE
a “periodic” sort of signal which is suitable for a Time And Distance
report.
An example of using these messages to define a signal:
Defining the speed signal
S06
to be true whenever the vehicle’s speed ex-
Example
ceeds 55mph and false whenever the speed is below:
>
SGS0610550
<
Now the speed signal
S06
can be used on an event’s definition to gener-
ate a report every time the vehicle exceeds 55mph :
>
SED33NT3;S06+
<
We just defined event 33 to send an ET report to DA 3 every time the
S06
signal switches from false to true , that’s what the + sign does. The
report will only be generated once. In order for the event to trigger again
the
S06
signal has to become false first and then true again. This means
that the speed excess is going to be reported every time the speed goes from
anything less than
55mph to a larger value but not every time the speed
remains at the larger value.
4.5.5 Examples
Some examples about the use of the event machine are presented next.
For complete examples containing both the
Event Machine and the other
parameters necessary to get the unit working refer to the Scenarios and
Examples chapter. To understand the events’ configuration format refer to
the
ED
message on the TAIP reference.
Configuring two events on the Event Machine to generate an ignition report:
Example
The ignition ON event may be defined as:
>
SED18NV4;F00+
<
And the Ignition OFF event:
>
SED19NV4;F00-
<
Both events’ routing actions indicate that the destination of the report is
the DA 4 and that
EV
is the reporting message to generate. Both events use
a simple trigger consisting of a one-signal-only condition,
F00
which is the
vehicle’s ignition signal.
Creating an event to detect when the vehicle leaves a defined region:
Example
When a vehicle is outside the perimeter defined by the polygon that de-
fines a region, the corresponding region’s signal is set to false. To generate
an event whenever a vehicle leaves the region the region’s signal has to be
monitored for the
true to false transition (this is done with the minus sign
on the event’s trigger):
>
SED24NV7;R26-
<
This event is going to be reported to DA 7 which has to be defined be-
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