Operating Instructions

2 Parameters
2.2 List of parameters
SINAMICS G120 CU230P-2 Control Units
176 List Manual, 04/2018, A5E33838102
Description: Sets the search current for the "flying restart" function.
The value is referred to the motor magnetizing current.
Dependency: The parameter is pre-assigned depending on the size of the power unit.
Refer to: r0331
Caution: An unfavorable parameter value can result in the motor behaving in an uncontrollable fashion.
Notice: The following applies for a synchronous reluctance motor:
The minimum search current is limited (p1202 >= 50 %).
Note: In U/f control mode, the parameter serves as a threshold value for establishing the current at the beginning of the
flying restart function. When the threshold value is reached, the actual search current is set as a function of the
frequency based on the voltage setpoints.
Reducing the search current can also improve flying restart performance (if the system moment of inertia is not very
high, for example).
The following applies for a synchronous reluctance motor:
Adjusting the search current only has an effect if a motor data identification run is then performed (see p1909 bit 22).
It is possible that a value exceeding 100% cannot be reached if the motor rated power is significantly less than that of
the power unit.
If the motor rated power is significantly higher than that of the power unit, then the search current should be
increased for the higher speed range.
Description: Sets the search current for the "flying restart" function.
The value is referred to the motor magnetizing current.
Dependency: Refer to: r0331
Caution: An unfavorable parameter value can result in the motor behaving in an uncontrollable fashion.
Notice: The following applies for a synchronous reluctance motor:
The minimum search current is limited (p1202 >= 50 %).
Note: In U/f control mode, the parameter serves as a threshold value for establishing the current at the beginning of the
flying restart function. When the threshold value is reached, the actual search current is set as a function of the
frequency based on the voltage setpoints.
Reducing the search current can also improve flying restart performance (if the system moment of inertia is not very
high, for example).
The following applies for a synchronous reluctance motor:
Adjusting the search current only has an effect if a motor data identification run is then performed (see p1909 bit 22).
It is possible that a value exceeding 100% cannot be reached if the motor rated power is significantly less than that of
the power unit.
If the motor rated power is significantly higher than that of the power unit, then the search current should be
increased for the higher speed range.
p1202[0...n] Flying restart search current / FlyRest I_srch
PM230 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
10 [%] 400 [%] 90 [%]
p1202[0...n] Flying restart search current / FlyRest I_srch
PM240
PM250
PM260, PM330
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
10 [%] 400 [%] 100 [%]