TrimTrac ProE Locator, Technical Manual

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TrimTrac ProE Locator Technical Manual v2.0e 47
Query-to-Fix Applications
Some applications may not need regular position updates at all and only need
regularly scheduled status updates to confirm device health and battery level. In
such applications, the device would occasionally be queried for its current
position on an “as-need” basis..
Setting Point Counterpoint
Report Delay Flag set to
“1=Tx Exception Reports
Only”. Saves communication costs
by not transmitting any
normal REP_POSTION or
STATUS_MESSAGE Normal reporting is halted
unless queried.
Scheduled Report Mode set
to either “1=Weekly” or
“2=Daily” depending upon
how frequently a health and
battery level check is
desired Set Scheduled Report Time,
T18, to whatever time of
week or day the device is to
transmit a
STATUS_MESSAGE with
TriggerType set
“4=Scheduled Report” Alternately, the Report
Delay Flag could be set
“3=Tx IDLE Timeout, T1,
Status Messages &
Exceptions” with IDLE
Timeout, T1, set to 999,990
seconds.
Motion Sensor Override set
to “2=Motion Never” This will keep the device
from computing a new
position fix even though
there may be actual motion. Because the device is not
actively computing position
fixes, the time to compute a
new fix upon receipt of a
QTKD message will be
marginally longer. No
positions will be logged
between QTKD messages.
Anytime Polling set
“1=Cycled” Polling Duty-Cycle
Frequency, T19, based on
the desired maximum
response time to a query.
For instance, if a one-hour
response time to a position
query is acceptable, then set
T19 to 3600 seconds;
Polling Duty-Cycle On-
Time, T20, set to 60
seconds. With these settings, the
device will turn on the
GSM modem within one
hour for 60 seconds of
coming to rest in the IDLE
State. During the 60
seconds, the device is able
to receive messages. Then
the off/on cycle repeats. If
T19 is increased
substantially, or in areas
with GSM networks known
to have poor coverage or
performance, it may be
beneficial to also increase
T20 to 120 or 180 seconds
to allow the SMSC more
time to send queued
messages.