Siemens SINAMICS S120 System Manual page 147

Blocking frequency fz
Bandwidth f
Numerator bandwidth f
Variation in the natural frequency
(p1426)
Figure 5-6
Velocity setpoint limitation
The velocity setpoint is limited in the positive (p1083) and negative directions (p1086).
Note
The maximum rapid traverse velocity of the drive (G0 function) is determined by NC machine
parameter 32000.
With a differential cylinder, the physically possible velocities for piston retraction and
extension are asymmetrical. For this reason, it is advisable to set asymmetrical limitations. A
message is sent to the PLC if the limit is violated.
Acceleration limiting
To protect mechanical components against excessive wear and damage, the drive
acceleration setpoints can be limited by the higher-level control system. Linearly interpolating
the velocity setpoints (p1400) ensures that the drive accelerates at the rate specified by the
control system. The acceleration is not limited in the drive. A braking ramp is only active
when the velocity controller is inhibited, see p1121.
Hydraulic Drive
System Manual, 04/2015, 6SL3097-4BA00-0BP1
Bn
Bz
Frequency response of the general bandstop filter
1000 Hz
500 Hz
0 Hz
70.7 %
1000 %
141.4 %
Drive functions
5.3 Closed-loop velocity control
147