Operating Instructions

2 Parameters
2.2 List of parameters
SINAMICS G120 CU230P-2 Control Units
240 List Manual, 04/2018, A5E33838102
Note: For bit 17:
Displays the enabled status of the rugged model feedback (p1784).
The feedback is used to increase the parameter ruggedness of the motor model and is effective in the operating
range of the two-component closed loop current control.
For bit 18:
Displays the status when enabling the differential current feedback in the current model for operation with encoder.
The function is automatically enabled with p1784 > 0 or p1731 > 0. The feedback is used for a rugged change
between the current model and complete machine model with active rugged model feedback and combination
current.
For bit 19:
Displays the currently active stator circuit feedback in current model operation.
For bit 20:
Displays the currently effective increase of the changeover limits by the value p1749 * p1755.
For bit 21:
For a blocked synchronous motor, the speed ramp-function generator is held in the open-loop speed controlled
operating range if the torque setpoint reaches the torque limit and the speed is less than the threshold value in
p2175.
Description: Sets the speed to change over the motor model to encoderless operation.
Dependency: Not visible with application class: "Standard Drive Control" (SDC, p0096 = 1)
Refer to: p1749, p1756
Notice: The changeover speed represents the steady-state minimum speed up to which the motor model can be used in
sensorless steady-state operation.
If the stability is not adequate close to the changeover speed, it may make sense to increase the parameter value.
On the other hand, very low changeover speeds can negatively impact the stability.
Note: The changeover speed applies for the changeover between open-loop and closed-loop control mode.
Description: Sets the hysteresis for the changeover speed of the motor model for encoderless operation.
Dependency: Not visible with application class: "Standard Drive Control" (SDC, p0096 = 1)
Refer to: p1755
Note: The parameter value refers to p1755.
Extremely small hystereses can have a negative impact on the stability in the changeover speed range, and very
high hystereses in the standstill range.
p1755[0...n] Motor model changeover speed encoderless operation / MotMod n_chgSnsorl
Access level: 3 Calculated: p0340 = 1,3 Data type: FloatingPoint32
Can be changed: U, T Scaling: - Dyn. index: DDS, p0180
Unit group: 3_1 Unit selection: p0505 Func. diagram: -
Min Max Factory setting
0.00 [rpm] 210000.00 [rpm] 210000.00 [rpm]
p1756 Motor model changeover speed hysteresis encoderless operation /
MotMod n_chgov hys
Access level: 3 Calculated: p0340 = 1,3 Data type: FloatingPoint32
Can be changed: U, T Scaling: - Dyn. index: -
Unit group: - Unit selection: - Func. diagram: 6730, 6731
Min Max Factory setting
0.0 [%] 95.0 [%] 50.0 [%]