Internal Clock
The radar has a built in clock/calendar function. This is used to keep the time for time
stamping historical records saved by the
Advanced In-Radar traffic statistics
collection
feature.
Because the radar is potted it does not feature a built-in clock backup battery. The
power must remain on for the clock to keep time. However an external clock battery
may be connected to keep time while radar goes into low power sleep mode. See
Appendix C for more details.
Real Time Occupancy Indicators (experimental)
The radar keeps real time occupancy indicators on a lane-by-lane basis. The values are
periodically re-calculated over a user-configurable time interval specified in seconds via
the TA variable and stored in O1…O6 variables in volatile domain.
An external controller may access occupancy indicators by reading variables O1 through
O6 in the volatile domain via binary protocol (requires SDK) or ASCII protocol. You
may also configure the radar to
stream this data in ASCII format
on a periodic basis.
Typical application of the occupancy feature is incident detection. A sudden increase in
occupancy numbers usually indicates that the traffic is slowing down or stopping.
