Kübler SMC1.3, Safety Manual

Page: 171 / 235

R60047.0002 - Index 2 EN – page 51 / 115
Position
Error
If a Position error appears at normal rotation speed, check the rotation direction
and the ratio of the encoders (see chapter Direction Settings and Frequency Ratio
Setting).
If the Position Error still appears, the encoder positions diverge.
In this case, check the maximum permissible deviation of the encoder positons
and adjust the parameter „Div. Inc-Value“.
Do not use the Position comparison, when the encoders slip or no comparison is
possible.
9.5 Sampling Time and Fliter
All State boxes (except DIL switch States S1. ) light green at this time. Now please select
in the button bar. We must determine the operating range of the unit,
comprising the frequency range from the lowest switching point to the highest switching
point:
1. Find out, which of the sensor frequencies shows the highest instability and
fluctuation.
2. Move through the frequency range and find out the point of maximum
fluctuating. In general this will be around the lowest switching point (underspeed
or frequency band).
3. The frequency can be smoothed by use of parameter “Sampling Time” and
parameter “Filter”. Higher settings result in smoother running, but increase the
response time and the fault detection time.
4. A combination of Sampling Time and Filter achieve the best result for smoothing
the complete frequency range of input frequencies. Frequencies out of the
Sampling Time, regarding to lower frequency range, are smoothed by the
parameter Filter.
5. Only exceptionally you should set the Sampling Time to smoothen frequencies
below the lower switch point setting (under speed or frequency band).
6. The Sampling Time and the Filter setting may also affect the signal variation on
the analog output.
7. The settings can be verified at the “Monitor SMC2.4 Frequency”.
No. Parameter Remark
000 “Sampling Time” Control of frequency fluctuation
012 „Filter“ Control of frequency fluctuation