Droop - Siemens SINAMICS S120 Function Manual

The reference model can also be emulated externally and its output signal injected via
p1437.
Function diagrams (see SINAMICS S List Manual)
● 6031 Pre-control balancing for reference/acceleration model
● 6040 Speed controller
Overview of key parameters (see SINAMICS S List Manual)
● p0311[0...n] Rated motor speed
● r0333[0...n] Rated motor torque
● p0341[0...n] Motor moment of inertia
● p0342[0...n] Ratio between the total moment of inertia and that of the motor
● r0345[0...n] Nominal motor starting time
● p1400.2[0...n] Acceleration pre-control source
● p1428[0...n] Speed precontrol deadtime for balancing pre-control speed
● p1429[0...n] Speed pre-control time constant for balancing
● p1496[0...n] Acceleration precontrol scaling
● r1518 CO: Accelerating torque
For reference model
● p1400.3[0...n] Reference model speed setpoint I component
● p1433[0...n] Speed controller reference model natural frequency
● p1434[0...n] Speed controller reference model damping
● p1435[0...n] Speed controller reference model deadtime
● r1436 CO: Speed controller reference model speed setpoint output
● p1437[0...n] CI: Speed controller reference model I component input
4.6

Droop

Droop (enabled via p1492) ensures that the speed setpoint is reduced proportionally as the
load torque increases.
Drive Functions
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
Vector control
4.6 Droop
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