XT55 AVL User’s Guide
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XT55_avl_ug_V03 Page 16 of 37 28.06.2004
3.1.1 Configuration examples The following example explains how to use filters for time, distance and speed. The
respective minimum values for time, speed and distance have an AND-operation. This
means that if only one value does not apply, all three values are ignored and not saved in the
history.
The maximum values have an OR-operation. If one of the maximum parameters has been
met, the GPS protocols will be saved in the GPS history.
According to the flow chart given in Figure 11 either all minimum parameter or at least one
maximum parameter must be exceeded in order to store the NMEA messages in the GPS
history.
If all values are set to 0, no data will be saved in the history.
Table 1: Conditions for saving data in the GPS history
Minimum
(lowest value)
Maximum
(highest value)
Time filter
Distance filter
Speed filter
FixMinTime (sec)
AND
Dist.Min(m)
AND
SpeedMin(km/h)
FixMaxTime (sec)
OR
Dist.Max(m)
OR
SpeedMax(km/h)
Combination of both OR
Storing of protocol
Table 2: Programming example
minTime
[s]
maxTime
[s]
minDist
[m]
maxDist
[m]
minSpeed
[km/h]
maxSpeed
[km/h]
Logs every 10 sec. 0 10 0 0 0 0
Logs every 100 m 0 0 0 100 0 0
Logs at speed
≥ 40 km/h 0 0 0 0 0 40