Siemens SIPART Series Operating Instructions Manual page 113

26 Slow step zone up / 27 Slow step zone down
The slow step zone is the area of mean control deviation. For more information on the slow
step zone, refer to the chapter "Control algorithm (Page 27)".
Select small values to achieve high speeds of shifting with small control deviations already.
Select large values to reduce overshoots particularly in case of large changes in the setpoint.
NOTICE
Overshoots or too low speeds of shifting
Too small values can result in overshoots.
• Enter a higher value.
Too large values result in too slow speeds of shifting near the adjusted status.
• Enter a smaller value.
43 Prediction up / 44 Prediction down
These parameters work similar to attenuation factors. These parameters are used to set the
control dynamics. The parameter settings have the following results:
● Small values result in quick adjustments with overshoots.
● Large values result in slow adjustments without overshoots.
SIPART PS2 with and without HART
Operating Instructions, 10/2013, A5E00074631-11
Note
Reference variable
It is advantageous to use a fixed reference variable to optimize the control data.
Therefore, change the deadband parameter from auto to a fixed value.
6.3 Optimizing the controller data
Operating
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