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Siemens SINAMICS G120D CU240D-2 DP - p1755[0...n] Motor model changeover speed encoderless operation; MotMod n_chgSnsorl; p1756 Motor model changeover speed hysteresis encoderless operation; MotMod n_chgov hys; p1758[0...n] Motor model changeover delay time closed;open-loop control; MotMod t cl_op

Siemens SINAMICS G120D CU240D-2 DP
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2 Parameters
2.2 List of parameters
SINAMICS G120D
242 List Manual (LH14), 01/2016, A5E33842313
Dependency: Not visible with application class: "Standard Drive Control" (SDC, p0096 = 1)
Refer to: p1752
Note: The value refers to p1752.
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.
Description: Sets the minimum time for falling below the changeover speed when changing from closed-loop controlled operation
to open-loop controlled operation.
Dependency: The wait time has no significance if the setpoint speed before the ramp-function generator lies in the open-loop
speed controlled operating range. In this case, the change is made without any delay.
Not visible with application class: "Standard Drive Control" (SDC, p0096 = 1)
Refer to: p1755, p1756
Note: If p1758 is changed, commissioning must be selected in order to validate the value for the blocking monitoring.
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 [%]
p1758[0...n] Motor model changeover delay time closed/open-loop control / MotMod t cl_op
Access level: 3 Calculated: - Data type: FloatingPoint32
Can be changed: U, T Scaling: - Dyn. index: DDS, p0180
Unit group: - Unit selection: - Func. diagram: -
Min Max Factory setting
100 [ms] 10000 [ms] 500 [ms]

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