Pag. 28 a 37
LP21/LP22 Installation instructions en Sensors
9.7 Setting direction detection (dual-channel variants)
Complex evaluation algorithms are integrated into the dual-channel detector for direction-dependent
recording of vehicles over double loops. The direction logic generates logical output signals that are given
out over the outputs depending on the setting. Parallel to this, the detector autonomously counts the logic
signals.
Fig.9: Direction detection principle
Direction A: Loop 1→Loop 2 or direction B: Loop 2→1
Signal output direction A or B
Direction logic system
• With all the logics, the first loop covered determines the direction of counting or of travel. If loop 1 is
covered first, the signal output and counting is done for direction A (see chapter 9.8 "Setting direction
logic (dual-channel variants)", page 29).
Counter readings in the Detector Tool
• It should be noted that the counter overflows at 65,535 (2
16
) and is automatically erased.
• The counter readings are not protected against power failure!
Switched off (factory settings)
Tab.21: Setting direction detection
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