AW00118303000 Acquisition Control
Basler racer GigE 147
There are two main things to notice about this example. First, because the encoder mode is set to
any direction, ticks from the shaft encoder will cause the module to output trigger signals regardless
of the conveyor direction, as long as the reverse counter is not incrementing or decrementing.
Second, the reverse counter will compensate for conveyor jitter regardless of the conveyor
direction.
It is important to reset the reverse counter before the first traverse in the forward
direction. A reset sets the counter to 0 and synchronizes the counter software with
the conveyor direction. (The software assumes that the conveyor will move in the
forward direction after a counter reset).
9
The conveyor reaches the end of its
reverse travel and it stops.
Camera
Stop
10
The conveyor begins moving forward and the shaft
encoder starts generating forward ticks.
The reverse counter is at 10 and will now begin
decrementing by 1 for each forward tick. While the
reverse counter is decrementing and the reverse
count is greater than 0, the output of trigger signals
from the module is suppressed.
Camera
Forward
11
The reverse counter reaches 0.
Suppression of trigger signals is ended. Because the shaft
encoder mode is set to any direction, the module begins
generating one trigger signal for each forward tick received.
The reverse counter remains at 0.
Camera
Forward
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