Control Techniques SM-Encoder Output Plus, Руководство пользователя

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SM-Encoder Plus & SM-Encoder Output Plus User Guide
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Issue: 4 www.controltechniques.com
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Figure 3-3 Encoder feedback signals
3.5 Simulated outputs (SM-Encoder Output Plus only)
The SM-Encoder Output Plus can provide simulated encoder output signals. The
source position is derived from either the encoder input on the module or from the drive
encoder input. The source encoder can be any incremental type or any sincos type of
encoder. If a sincos type is used as the source, the simulation output is derived from the
zero crossings of the sine waves and does not include interpolated information.
If a mode with marker lock is selected the incremental position is shifted when the first
input marker occurs so that with quadrature mode the marker is aligned with A high and
B high, and with frequency and direction mode the marker is aligned with F high.
The SM-Encoder Output Plus provides the ability to scale down the simulated encoder
output signals.
Incremental
signals
360 electrical (encoder)
°
90 separation of A and B
°
A
/A
B
/B
Z
/Z
Marker
signals
Index
alignment
reference
min max
Only encoders with lines per revolution that are a power of 2 can be used with the SM-
Encoder Plus and SM-Encoder Output Plus, e.g. 256, 512, 1024 etc.
The marker pulse duration must be between 45° to 360° electrical (encoder).
NOTE
Mode x.28
Quadrature outputs 0
Frequency and direction outputs 1
Forward and reverse outputs 2
Quadrature outputs with marker lock 3
Frequency and direction outputs with marker lock 4 to 7