Operating Instructions

Parameters
List of parameters
1-206
© Siemens AG 2008 - 2013 All Rights Reserved
SINAMICS G120 CU230P-2 Control Units List Manual (LH9), 01/2013
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.
Description: Sets the hysteresis for the changeover speed of the motor model for encoderless operation.
Dependency: 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.
Description: Sets the minimum time for falling below the changeover speed when changing from closed-loop controlled opera-
tion to open-loop controlled operation.
Dependency: Refer to: p1755, p1756
Description: Sets the minimum time for a transition from open-loop controlled to closed-loop controlled operation after the lower
changeover speed p1755 * (1 - p1756 / 100 %) has been exceeded.
Dependency: Refer to: p1755, p1756
Note: With p1759 = 2000 ms, the delay time becomes ineffective and the model changeover is determined by the output
frequency only (changeover for p1755).
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]
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: -
Units group: - Unit selection: - Func. diagram: 6730, 6731
Min Max Factory setting
0.0 [%] 95.0 [%] 50.0 [%]
p1758[0...n] Motor model changeover delay time closed/open-loop control / MotMod t cl_op
Access level: 4 Calculated: - Data type: FloatingPoint32
Can be changed: U, T Scaling: - Dyn. index: DDS, p0180
Units group: - Unit selection: - Func. diagram: -
Min Max Factory setting
100 [ms] 10000 [ms] 500 [ms]
p1759[0...n] Motor model changeover delay time open/closed-loop control / MotMod t op_cl
Access level: 4 Calculated: - Data type: FloatingPoint32
Can be changed: U, T Scaling: - Dyn. index: DDS, p0180
Units group: - Unit selection: - Func. diagram: -
Min Max Factory setting
0 [ms] 2000 [ms] 0 [ms]