User Manual
SINAMICS G120 CU230P-2 Control Units
List Manual (LH9), 04/2014, A5E33838102B AA
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2 Parameters
2.2 List of parameters
Description: Displays the status of the motor model.
Note: Re bit 17:
Displays the status when enabling the rugged model feedback (p1784) for operation with and without encoder.
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.
Re 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.
Re bit 19:
Displays the currently active stator circuit feedback in current model operation.
Re bit 20:
Displays the currently effective increase of the changeover limits by the value p1749 * p1755.
Re 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: 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.
r1751 Motor model status / MotMod status
Access level: 4 Calculated: - Data type: Unsigned32
Can be changed: - Scaling: - Dyn. index: -
Units group: - Unit selection: - Func. diagram: -
Min Max Factory setting
- - -
Bit field: Bit Signal name 1 signal 0 signal FP
00 Controlled operation Active Inactive 6721
01 Set ramp-function generator Active Inactive -
02 Stop RsLh adaptation Yes No -
03 Feedback Active Inactive -
05 Holding angle Yes No -
06 Acceleration criterion Active Inactive -
11 Speed controller output cannot be set to
zero
Yes No -
12 Rs adapt waits Yes No -
13 Motor operation Yes No -
14 Stator frequency sign Positive Negative -
15 Torque sign Motor mode Regenerative mode -
17 Operation with rugged model feedback Enabled Inhibited -
18 Operation of the current model with current
feedback
Enabled Inhibited -
19 Current feedback in the current model Active Inactive -
20 Rugged increase of the changeover limits Active Inactive -
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
Units group: 3_1 Unit selection: p0505 Func. diagram: -
Min Max Factory setting
0.00 [rpm] 210000.00 [rpm] 210000.00 [rpm]