Open Actual Speed Value - Siemens Sinamics S120 Function Manual

Preconditions
● All coupled drives must be operated in vector control and closed-loop speed control, with
● Only one (1) common ramp-function generator may be used for mechanically coupled
Function diagrams (see SINAMICS S120/S150 List Manual)
● 6030 Speed setpoint, droop
Overview of important parameters (see SINAMICS S120/S150 List Manual)
● r0079 CO: Torque setpoint
● p1488[0...n] Droop input source
● p1489[0...n] Droop feedback scaling
● p1492[0...n] BI: Droop feedback enable
● r1482 CO: Speed controller I torque output
● r1490 CO: Droop feedback speed reduction
● r1508 CO: Torque setpoint before supplementary torque
4.7

Open actual speed value

Description
The signal source for the actual speed value of the speed controller is specified via
parameter p1440 (CI: speed controller actual speed value). The unsmoothed actual speed
value r0063[0] has been preset as the signal source in the factory.
Depending on the machine, parameter p1440 can be used, for example, to switch on a filter
in the actual value channel or feed in an external actual speed value.
Parameter r1443 is used to display the actual speed value present at p1440.
Note
When infeeding an external actual speed value, care should be taken that the monitoring
functions continue to be derived from the motor model.
Behavior for speed control with an encoder (p1300 = 21)
A motor encoder must always be available for the speed or position signal of the motor
model (e.g. evaluation via SMC, see p0400). The actual speed of the motor (r0061) and the
position information for synchronous motors still come from this motor encoder and are not
influenced by the setting in p1440.
Drive functions
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
or without an encoder.
drives.
Vector control
4.7 Open actual speed value
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