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Dx35 How to teach the ObSB "active low" mode with pushbuttons
Article No: KA-02709
Version: 1.0
Subject to change without notice
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Dx35
Table of Contents
The Dx35 only offers a small subset of its functions for teach-in via the pushbuttons. Inverting the output signal for "ObSB" is not available in this way. This may be necessary if the sensor's digital output is required to operate in "active low" mode (also known as "NC" or "normally closed" mode).
A similar behavior can be achieved by setting the sensor to window mode with "near < far" and a quite small window size. It is recommended to have a minimum delta of about 100 mm between near and far point. This way a stable operation will be possible even with external influences like temperature change, different background color, small alignment errors etc.
The following procedure might help to teach the switching points while looking at a fixed target.
For the "near" point: Place a flat object in front of the background during the teach process (thickness approx. 50 mm).
To teach the "far" point: The distance should be approx. 50 mm larger than the regular distance between sensor and background.This could be achieved by temporarily redirecting the sensor to another target for the teach process ( e.g. by tilting the sensor). For a distance of 1500 mm, the tilt angle should be about 15° to get a delta of 50 mm. 391mm
