Encoder Sample Time - KEB COMBIVERT F5 Instruction Manual

Parameter Description - Encoder Set Up

Encoder sample time

This parameter is used to adjust the sample time of the encoder
feedback for calculation of the actual motor speed value. With certain
motors or encoders it may be benefi cial to use a time other than the
factory setting. Lower values lead to higher bandwidth and faster
response times of the motor. However lower values also increase
the systems susceptibility to electrical noise on the encoder signal.
Therefore on some systems having higher noise levels, lower values
may not be suitable. If this electrical noise is a problem, the motor will
produce an audible noise while running.
Unit: -
Value range: 0_5, 1, 2, 4 , 8, 16, 32, 64, 128, 256 mSec
Default setting: 4 mSec
Adjusted value: based on application requirements
Example: with a 4 mSec sample time the resulting speed measurement
resolution using a 1024 encoder is +/-3.5 rpm. A setting of 8 mSec
gives +/-1.8 rpm.
With Sin/Cos, Hiperface, EnDat encoders see also parameter LF.76
for extended resolution adjustments.
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