TrimTrac ProE Locator, Technical Manual

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TrimTrac ProE Locator Technical Manual v2.0e 34
If the application requires more immediate notice that a device has started to
move (i.e. a “Start Report”), then the Motion Report Flag should be enabled. In
so doing, the device will send an immediate STATUS_MESSAGE to the server
application that motion has commenced while the device was in the IDLE State.
After this initial STATUS_MESSAGE is sent, then the device will go compute a
new position fix and commence further reporting in accordance with its other
configuration settings. If the device was in some state other than the IDLE State
when motion commenced, then the device will first compute a new position fix
before sending a new message to the server application.
A “Stop Report” is also available under the Motion Report Flag settings. The
TrimTrac ProE will also attempt a final “at-rest” position after coming to a stop;
however, the Stop Report function will set the TriggerType to “6=Stop Report”
denoting that the device has actually come to rest.
Unlike the Start/Stop reporting settings under Report Delay Flag, the transmission
of in-route position reports and status messages will NOT be selectively
suppressed based upon these Motion Report Flag settings alone.
Report Delay Flag
This is an extremely important parameter used to help manage communication
costs. It has little, if any, impact on power consumption, but it is instrumental in
minimizing communication costs. Basically, the Report Delay Flag selectively
suppresses the transmission of messages until certain events occur or messages
are received from the server application.
For instance, setting the Report Delay Flag to “1=Tx Exception Reports only”
suppresses all normal position reports and status messages and only Exception
Reports are transmitted.
An Exception Report is defined as any message that is transmitted as a result of:
•
Alert Status (HPA, MPA or LPA) becoming set to either “1=Activated” or
“2=Sent”;
•
Scheduled Report becoming due;
•
Violation of a Scheduled Hours Mode, Geofence Enforcement or Speed
Enforcement parameter;
•
Response to queries received from the server application.
Provided there are no conditions that would otherwise trigger an Exception
Report, the device will operate in the background based on motion to compute
and log, but not transmit, new position fixes whenever the Report Delay Flag is
set to “1=Tx Exception Reports only”. These logged messages and positions can
be subsequently retrieved by the server application by sending the TrimTrac ProE
the appropriate query message. The server application can change the device
configuration or query it for other information and still get a response even if the
Report Delay Flag is set to suppress some or all other messages. All alert, query