TrimTrac ProE Locator Technical Manual v2.0e
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The TrimTrac ProE is designed to compute new position fixes while the device is
in motion. The rate at which the TrimTrac ProE computes new position fixes
needs not be the same rate at which it transmits those logged positions to the
server application. While the device is in motion, the DELAY Timeout, T4,
setting largely determines the frequency at which the TrimTrac ProE will attempt
to compute and log a new position fix.
How frequently those logged positions are transmitted, however, is determined
mostly by the Report Delay Flag setting. For instance, if the Report Delay Flag is
set to some value other than “0=Transmit (‘Tx’) All Messages”, some or all of the
logged positions may not be transmitted unless a QUERY_LOG or similar
message is received by the TrimTrac ProE or if the Scheduled Report Mode is set
to either “1=Weekly” or “2=Daily”.
Battery Life and Communication Costs
If computing position fixes consumed no power and if communication costs were
“free,” then there would be no need to worry about such things. Alas, such is not
the case. In any given application, there must be an appropriate trade off between
communication costs, power consumption and battery life and the need for
information. Taking into account the foregoing general considerations, the
following sections look at different application scenarios and suggest possible
configurations.
Polling
In its default configuration, the server application can communicate with the
TrimTrac ProE only while the device is in the QUERY State, which may not
allow frequent enough communications for some applications. As such, the
TrimTrac ProE has several different polling options that can be activated
depending upon the appropriate mixture of power consumption, communication
costs and the need to communicate with the device in a timelier manner than
allowed by the default settings.
Depending upon the specific application requirements, the polling capability of
the TrimTrac ProE can be selectively turned on and off or simply left on
continuously regardless of motion or current operational state.
For instance, if Anytime Polling is set to “2=Anytime OnDemand”, then the GSM
modem will never be turned off. The device will be able to receive and process
data messages whether the device is at rest or is in motion regardless what
operational state the device may be at the time. Power consumption and battery
life will both be negatively affected.
If, on the other hand, continuous polling capabilities are required only while the
device is in motion, then the In-Motion Polling feature would be set
“1=OnDemand while in Motion”. Once the device comes to rest, the GSM
modem would be turned off to save power. It would be powered back up upon
the occurrence of a TriggerType event or whenever the Polling Duty-Cycle On-
Time, T20, is running.
Содержание ProE Locator
Страница 83: ...TrimTrac ProE Locator Technical Manual v2 0e 65 Figure 19 External GPS Antenna Connected to TrimTrac ProE ...
Страница 112: ...TrimTrac ProE Locator Technical Manual v2 0e 94 Figure 24 HPA Processing in TRANSMIT ...
Страница 113: ...TrimTrac ProE Locator Technical Manual v2 0e 95 Figure 25 MPA Processing in TRANSMIT ...
Страница 114: ...TrimTrac ProE Locator Technical Manual v2 0e 96 Figure 26 LPA Processing in TRANSMIT ...
Страница 115: ...TrimTrac ProE Locator Technical Manual v2 0e 97 Figure 27 Other Message Processing in TRANSMIT ...
Страница 150: ...TrimTrac ProE Locator Technical Manual v2 0e 132 Default AT CTKY 10 10 10 10 0 300 60 0 0 0 0 1 0 ...
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Страница 192: ...TrimTrac ProE Locator Technical Manual v2 0e 174 ZZ Checksum Table 78 RESP_EXT2_APP_CONFIG Message ...
Страница 205: ...TrimTrac ProE Locator Technical Manual v2 0e 187 Quick Reference Tables ...
Страница 231: ...TrimTrac ProE Locator Technical Manual v2 0e 213 Figure 36 Vehicle Adapter Module Alert Wiring Diagram ...
Страница 232: ...TrimTrac ProE Locator Technical Manual v2 0e 214 Figure 37 Control Module Wiring Diagram ...