Siemens SIPART PS2 PA 6DR55 Series, Руководство по эксплуатации

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Operation
7.3 Optimizing the controller data
SIPART PS2 with PROFIBUS communication
Operating Instructions, 09/2007, A5E00127926-07
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22 lmpulse length up / 23 lmpulse length down
You can use these parameters to determine the smallest impulse lengths for each actuating
direction. The actuator is then moved with these lengths. The optimum value depends on the
volume of the actuator in particular. Small values lead to small controller increments and
frequent activation of the actuator. Large values are advantageous for large actuator
volumes.
NOTICE
Controller increments
• There is no movement if the values are too small.
•
Large controller increments also lead to large movements in case of small actuators.
26 Slow step zone up / 27 Slow step zone down
The slow step zone is an area of the control deviation. It includes the area between the fast
step zone and the dead zone. The actuator is activated in the dead zone in a pulsed manner.
Even at small control deviations, the small values result in relatively large speeds of shifting.
Too large speeds of shifting result in overshoots.
Large values reduce the overshoot especially in case of large changes in the setpoint. They
lead to slow speeds of shifting near the corrected status.
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 work as follows:
●
Small values result in quick adjustments with overshoots.
● Large values result in slow adjustments without overshoots.
Note
Reference variable
It is advantageous to use a fixed reference variable to optimize the control data.
Therefore, change the dead zone parameter from auto to a fixed value.