Wachendorff WDGA 58F handleiding
Handleiding
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Technical Manual
WDGA with EtherNet/IP
3 - Device description
© Wachendorff Automation GmbH & Co. KG
8
Unlike incremental encoders, absolute-value encoders output their position value as a
digital number via a fieldbus. A distinction is made here between singleturn and
multiturn encoders.
In addition to simply outputting the position value, most encoders permit a certain
degree of parametrization, such as selecting the positive direction of rotation, setting
the position value to a reference value at a fixed physical position, and scaling the
position value to an arbitrary resolution and a limited measuring range. This reduces
the required complexity of the control program as well as the computational burden on
the controller.
3.3.1 Singleturn — ST (QuattroMag®)
Measurement of the angle from 0° to 360° by means of a shaft represents the minimum
functionality of a rotary encoder. The sensor system is based on optical or magnetic
sampling of a measuring graduation on the encoder shaft.
The WDGA encoders from Wachendorff feature the new QuattroMag® magnetic
technology, which provides maximum precision and resolution for a singleturn
encoder.
3.3.2 Multiturn — MT (EnDra®)
A multiturn encoder allows the number of revolutions to be recorded. This is achieved
via a rotation counter. The WDGA encoders include EnDra® technology, which
ensures that the corresponding information is retained, even in a voltage-free state.
This means that buffer batteries and gearboxes, which require a comparatively large
installation space and a correspondingly high degree of maintenance, are no longer
needed.
3.3.3 Direction of rotation
The positive direction of rotation can be reversed by a simple two's complement of the
position value (invert every bit and add "1").
3.3.4 Preset
The desired position value can be assigned to the encoder at a specific physical
position. This must be within the measuring range so that the position value is
correlated with a physical reference position. For this purpose, the difference between
the current position value and the desired value is calculated. The result is stored in
non-volatile memory and added to the position value as an offset.
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Productinformatie
| Merk | Wachendorff |
| Model | WDGA 58F |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 11849 MB |
