VEK M2E-2 Operating instructions
8 03/06 FEIG ELECTRONIC GmbH
c) Vehicle rolling back
12
DIP-switch 8 "ON"
pulse signal
DIP-switch 8 "OFF"
permanent signal
Ð
1 2
Ð
12
Relay 1
Æ directional pulse
Relay 1
Æ permanent direction signal
'on'
Ð
1 2
Relay 1
Æ permanent direction signal
'off'
Ð
12
Relay 2
Æ directional pulse
indicates vehicle is rolling back
The evaluation of the direction signal in opposite direction of motion is done in the same
way.
In case of a loop breach resp. closing, the system switches over to the presence detection
mode for the time of the failure. A permanent signal is now emitted by the relay of the intact
loop channel as soon as the loop is occupied.
2.5.Readjustment (Reset)
The detector automatically carries out a loop frequency adjustment as soon as the power
supply is switched on. In case of a short-term voltage loss <0,3s, no readjustment will be
carried out; conditions remain stored. A readjustment may be triggered manually by pressing
the reset key. If the loop frequency is stable, the adjustment time is approx. 1s. If the loop is
occupied during this adjustment phase, the adjustment time will be extended accordingly. In
case that the loop is permanently occupied during the adjustment process, the detector will
be readjusted as soon as the vehicle has left the loop. Due to this, the following vehicles will
again be detected. Longer adjustment times hint to an unstable loop frequency. The
loop/detector system has to be checked with regard to possible interferences.
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