Siemens SINUMERIK 840D sl Commissioning Manual page 199

Figure 11-7
At maximum axis velocity, there is a (virtual) step change in the velocity (continuous line).
The curves represented by the dashed line correspond to a realistic, finite value. The offset
component is excluded from the display graphic in order to emphasize the transient
processes.
Measurement: Setpoint step change
To avoid overloading the mechanical system of the machine, the step height is limited to the
value specified in the machine data during the "Setpoint step change" measurement:
● MD32000 MAX_AX_VELO (maximum axis velocity)
This may result in failure to achieve the desired step height.
IBN CNC: NCK, PLC, drive
Commissioning Manual, 07/2007, 6FC5397-2AP10-3BA0
If an offset value other than zero is input, the step change is stimulated during traversal.
For the sake of clarity, the displayed actual position value does not include this speed
offset.
Signal chart for position setpoint/ramp measuring function
11.2 Frequency response measurements
Optimize the drive.
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