TrimTrac ProE Locator, Technical Manual

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TrimTrac ProE Locator Technical Manual v2.0e 20
Geofences
By establishing and using geofences, geographic areas of authorized and unauthorized
use can be defined and enforced. If a geofence violation occurs, the operation of the
TrimTrac ProE will be adjusted based upon how it is configured. For instance, should
you wish to establish an area where movement of the device is “authorized” and you only
wish to receive position reports when the monitored asset leaves this area, then you
would use the geofence capability of the TrimTrac ProE. The TrimTrac ProE can
support up to two geofences. Geofence violations selectively set the Report Delay Flag
while the other configuration parameters remain essentially unchanged.
Once a geofence violation is detected, the Report Delay Flag will be temporarily set
“0=Transmit (‘Tx’) All Messages”, the device will transmit a both a new position report
noting that a geofence violation has occurred and a message noting which geofence had
been most recently violated. Unless the Geofence Type had been defined as a boundary-
crossing geofence, the device will continue reporting until the device is no longer
violating any geofence conditions. It will report the first position that is not in violation
of a geofence, but then stop reporting until another geofence violation or some other
appropriate TriggerType event occurs
Enforcement
You can decide whether to enforce a geofence at all times (24/7), during normal
working hours or after hours (both as defined by the Scheduled Hours Mode
feature settings) or, if the TrimTrac ProE is equipped with either a Vehicle
Adapter or Control Module with the LPA input connected to a switch, the
geofence will be enforced only while the LPA input monitored switch is in the
closed position. If the LPA input is configured to define and/or enforce a
geofence, then the LPA input should not be used as either an alert or runtime
meter input and vice versa.
Geofence Center
To establish a geofence area, whether circular or rectangular in shape, you must
first select the center point of the geofence area defined in latitude and longitude.
This can be done in three ways. Either you enter it into the TrimTrac ProE during
the provisioning process, by sending a TrimTrac Application command via the
GSM network, or, if the TrimTrac ProE is using either a Vehicle Adapter or
Control Module, by configuring the LPA input to define and/or enable a geofence
based upon the operation of a LPA switch.
It is acceptable to have geofences that overlap one another; however, having one
geofence located entirely inside the other should be avoided. If one geofence is
located completely inside the other, then only the larger of the two will be
enforced.