Siemens SIMODRIVE 611 universal Function Manual page 380

6 Description of the Functions
6.2 Positioning mode (P0700 = 3, from SW 2.1)
Table 6-25 Parameters for speed pre–control
No.
0203 Speed pre–control mode
... the speed pre–control can be activated/de–activated.
1 Speed pre–control active
0 Pre–control not active
0204:8 Factor, speed pre–control
... the supplementary speed setpoint which was entered is weighted.
When the axis control loop has been optimally set as well as a precisely determined equivalent
time constant of the speed control loop (P0205, P0206), the pre–control factor has the value
100%.
0205:8 Balancing filter, speed pre–control
(dead time)
... allows the performance of the speed control loop to be simulated with a dead time.
Note:
The entered value is limited to two position controller clock cycles (P1009)
(1 position controller clock cycle is, as standard = 2 ms, refer to Chapter 4.6).
0206:8 Balancing filter, speed pre–control
(PT1)
... allows, in addition to P0205:8 the performance of the speed control loop to be simulated us-
ing a PT filter (low–pass filter).
1
... allows a possibly active speed setpoint smoothing to be better emulated (PT1).
0210:8 Time constant, position reference value
filter
... is the time constant of the PT1 position reference value filter.
The effective Kv factor is reduced using the filter (position loop gain).
Applications:
S
To reduce the pre–control dynamic performance
Example:
S
Jerk limiting
This makes it possible to achieve smoother control characteristics with improved response
to disturbances.
1012.8 Average value filter, speed setpoint
... selects whether the speed setpoint steps from the position controller output (position control-
ler clock cycle) are interpolated in the speed controller clock cycle (adapted).
= 1 Average value filter, speed setpoint filter on (standard)
Disadvantage: Delay in the position control loop by half a position controller clock
cycle.
= 0 Average value filter, speed setpoint off
6-380
Name
0
1.0
0.0
0.0
0.0
Kv factor = 3 * 1000/min ––> P0210:8 = 20.0 ms
–
SIMODRIVE 611 universal Description of Functions (FBU) – 04.05 Edition
Min. Standard Max.
0 1
100.0 100.0
0.0 10.0
0.0 100.0
0.0 1 000.0
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01.99
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