Control Techniques SM-Encoder Output Plus, Руководство пользователя

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SM-Encoder Plus & SM-Encoder Output Plus User Guide
31
Issue: 4 www.controltechniques.com
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Index
The following encoders can be connected to the SM-Encoder Plus.
0, Ab: Quadrature incremental encoder, with or without marker pulse
1, Fd: Incremental encoder with frequency and direction outputs, with or without marker
pulse
2, Fr: Incremental encoder with forward and reverse outputs, with or without marker
pulse
The terminations may be enabled/disabled by this parameter as follows:
A sliding window filter may be applied to the feedback. This is particularly useful in
applications where the feedback is used to give speed feedback for the speed controller
and where the load includes a high inertia, and so the speed controller gains are very
high. Under these conditions, without a filter on the feedback, it is possible for the speed
loop output to change constantly from one current limit to the other and lock the integral
term of the speed controller. The filter is not active if the parameter value is 0 or 1ms,
but operates over the defined window for parameter values of 2, 4, 8 and 16ms.
x.15 Encoder type
RW Uni US
Ú
Ab (0), Fd (1), Fr (2)
Ö
Ab (0)
Update rate: 4ms x number of dumb modules
x.16 Encoder termination
RW Txt US
Ú 0 to 2 Ö
1
Update rate: Background read
Encoder input x.16=0 x.16=1 x.16=2
A-A\ Disabled Enabled Enabled
B-B\ Disabled Enabled Enabled
Z-Z\ Disabled Disabled Enabled
x.19 Feedback filter
RW Uni US
Ú
0 to 5 (0 to 16 ms)
Ö
0
Update rate: Background read
Value in Pr x.19 Filter window
0 Not active
1 Not active
2 2ms
4 4ms
8 8ms
16 16ms