Drive Functions; Block Diagram Of Closed-Loop Control - Siemens SINAMICS S120 System Manual

Drive functions

5.1

Block diagram of closed-loop control

System integration
Diagrams showing how the HLA module is principally embedded between the control system
and the hydraulic drive – as well as additional logic overviews are provided in the function
diagrams:
• 4965
• 4966
• 4970
• 4975
The control-related functions of the HLA module are shown in greatly simplified form. They
are shown in more detail in the following.
Possible dynamic response
The dynamic response that can be achieved depends on the following values:
● Natural frequency of the servo solenoid valve
● Natural frequency of drive
With increasing natural frequency, a higher dynamic response can be achieved.
For the purpose of oscillation damping, the natural frequency of the servo solenoid valve
must be greater than that of the drive.
Hydraulic Drive
System Manual, 04/2015, 6SL3097-4BA00-0BP1
Figure 5-8 Function diagram 4965 - velocity controller (Page 155)
Figure 5-18 Function diagram 4966 - transition point compensation (Page 179)
Figure 5-14 Function diagram 4970 - force controller (Page 171)
Figure 4-36 Function diagram 4975 – valve characteristic and plane adaptation
(Page 103)
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