vs | plus has a function that makes it possible to count vehicles in the red of the traffic stream and to measure the green time with this number of vehicles in the green. Several detectors can be used for counting per traffic stream. In such a case, the largest counted value is used to calculate the green time.
How it works: When the traffic stream is red, each detector pulse is counted as one vehicle. It is counted until the traffic stream is switched to green. During this change, the time required (time required * number of vehicles counted) is used to calculate the green time required. This value is now used by vs | plus to measure the traffic stream when the green light is extended. The next time the traffic stream changes to red, the counting of vehicles starts again.
There are two exceptions to this principle: If the detector reaches the parametrised REDCC_OCCDEG value before the green begins, counting is stopped and the maximum green time is assumed. Secondly, the maximum green time is selected if the vs | plus detector fault recognises this detector as faulty.
|
Display |
Identifier |
Values |
Description |
|
REDCC_TREQ |
Time requirement |
|
The amount of time (in 1/10 seconds), per counted vehicle used to calculate the green time. |
|
|
|
|
|
|
|
|
Value |
Time in 1/10 seconds, per vehicle. |
|
REDCC_OCCDEG |
Occupancy degree |
|
After reaching this value (occupancy rate in %), the detector is considered to be faulty. No more vehicles are counted in. The green time is set to the parameter REDCC_MAXGREEN. |
|
|
|
|
|
|
|
|
Value |
Occupancy rate in %. |
|
REDCC_MAXGREEN |
Maximum green |
|
The maximum green time a traffic stream can receive when its count detector has been reported as disturbed. |
|
|
|
|
|
|
|
|
Value |
Maximum green time in seconds. |