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This parameter is only visible in closed loop PM motor mode (LF.4
= PCLSd or P9LSS). LF.77 displays the position of the encoder in
relation to one of the motor poles.
Unit: 1
Value range: 0 … 65535h
Default setting: 1000
Adjusted value: according to encoder position
If the position value is already known, simply enter the value in this
parameter. If it is not known then follow the procedure in section
5.11.1, 5.11.2 or 5.11.3 to measure the position.
Absolute encoder position
Encoder resolution
multiplier
This parameter can be used to increase the resolution of encoders
with analog sine/cosine tracks. The encoder types are SIN/COS,
Hiperface, EnDat.
Unit: 1
Value range: 0...13
Default setting: 2 for incremental encoders
8 for Sin/Cos, EnDat, or Hiperface encoders
The value corresponds to the multiplier using the following relation.
Actual Encoder Resolution = Encoder base ppr x 2
(LF76)
Example: Sin/Cos encoder with base resolution of 2048 ppr.
With LF.76 = 8 the actual measured resolution is:
2048 x 2
8
= 524288 counts / rev
Higher values give better resolution especially for gearless applications.
However higher values make the system more susceptible to
disturbances due to noise. Therefore the actual value which can be
used will ultimately be limited by the noise being picked up on the
encoder cable.
Parameter Description
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