Siemens SINAMICS S120 Commissioning Manual page 257

Making settings for the OBT
To make the settings for the OBT, proceed as follows:
1. Select the dynamic response setting for the OBT function corresponding to the mechanical
system of your machine.
The function optimizes the drive based on the selected dynamic response setting.
– Conservative
– Standard
– Dynamic
– Dynamic response factor
2. In the "Distance limit" field, enter the angle through which the motor and the connected
machine are permitted to turn for the required measurements (e.g. 360°) without the
mechanical system being damaged.
The angle should be at least 60° in order to be able to obtain practical controller parameters.
Generally, longer traversing distances result in better optimization results.
3. Should you wish to perform advanced settings, click on the "Advanced settings" button.
The "Configuration" dialog box opens. The table in the dialog shows a number of parameters
whose default settings you can change.
4. Correct the default settings for each of the required parameters, and then confirm your
settings with "OK".
Starting One Button Tuning
After you have made all of the presettings, you can start the OBT. To start the OBT, perform the
following steps.
Determining actual values
Click "Activate" in the "Measurement" area to measure the drive for the controller optimization.
The function determines all of the actual drive values required for the tuning.
Starting OBT
Click the "1" icon under "Switch on" to start the function.
The function is started.
Save a project
Save the project if the result was successful.
Commissioning with Startdrive
Commissioning Manual, 06/2020, 6SL3097-5AA10-0BP2
Slow closed-loop control – low stress on the mechanical system
Best compromise between fast speed control and low stress on the mechanical system
Fast speed control – high stress on the mechanical system
Fast speed control with manual definition of the dynamic response factor (factory setting:
80 %)
Commissioning
5.9 Commissioning a drive
255