Siemens SINAMICS S150 NEMA, Operating Instructions Manual

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Setpoint channel and closed-loop control
7.4 Vector speed/torque control with/without an encoder
Enclosed Drives
466
Operating Instructions, 12/2018, A5E36652151A
7.4.3 Actual speed value filter
Description
The speed actual value filter is used to suppress cyclic disturbance variables in speed
acquisition.
The speed actual value filter can be set as follows:
● 2nd order lowpass (PT2: -40 dB/decade)
● General 2nd order filter
Bandstop and low-pass with reduction are converted into the parameters of the general 2nd
order filter using STARTER.
The speed actual value filter is activated with p1656.4 = 1. The properties of the speed
actual value filter are set in p1677 to p1681.
As long as changes to the data of the actual speed value filter are being made, the
conversion of the new filter data can be prevented using p1699 = 1.
When p1699 = 0 is set, the calculation will be performed and the new values applied.
Note
For the vector control, there are 2 current setpoint filters and one actual speed value filter.
The actual speed value filter has been allocated the number "5".
Function diagram
FP 4715 Encoder evaluation - speed actual value and pole position sensing, motor
encoder (encoder1), n_act_filter 5
Parameters
• p1655[4] CI: Speed actual value filter 5 natural frequency tuning
• p1656.4 Speed actual value filter 5 activation
• p1677
Actual speed value filter 5 type
• p1678
Actual speed value filter 5 denominator natural frequency
• p1679
Actual speed value filter 5 denominator damping
• p1680
Actual speed value filter 5 numerator natural frequency
• p1681
Actual speed value filter 5 numerator damping
• p1699
Filter data acceptance