User's Manual

306UM0002 - 01 TD236 Enhanced Detector User Manual Page 15 of 35
Case 2: (AB LOGIC Presence Mode)
Forward direction
A - Vehicle Enters Loop1
B - Vehicle Enters Loop2
C - Vehicle Exits Loop 1
D - Vehicle Exits Loop 2
This is the correct forward
operation for Presence
AB Logic
Case 3: (AB LOGIC Presence Mode)
Reverse direction
A - Vehicle Enters Loop2
B - Vehicle Exits Loop 2
C - Vehicle Enters Loop1
D - Vehicle Exits Loop 1
Typically caused by loops
being too far apart or very
small vehicles
Case 4: (AB LOGIC Presence Mode)
Reverse direction
A - Vehicle Enters Loop2
B - Vehicle Enters Loop1
C - Vehicle Exits Loop 2
D - Vehicle Exits Loop 1
This is the correct reverse
operation for Presence
AB Logic