Siemens SINAMICS G120 Manual page 156

Parameters
List of Parameters
p1202[0...n] FlyRest srch curr / FlyRest I_srch
PM230 Access level: 3
Can be changed: U, T
Units group: -
Min
10 [%]
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.
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 prevailing search current is set dependent upon the
frequency on the basis of voltage inputs.
Reducing the search current can also improve flying restart performance (if the system moment of inertia is not very
high, for example).
p1202[0...n] FlyRest srch curr / FlyRest I_srch
PM240 Access level: 3
PM250, PM260
Can be changed: U, T
Units group: -
Min
10 [%]
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.
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 prevailing search current is set dependent upon the
frequency on the basis of voltage inputs.
Reducing the search current can also improve flying restart performance (if the system moment of inertia is not very
high, for example).
p1203[0...n] Flying restart search rate factor / FlyRst v_Srch Fact
PM230 Access level: 3
Can be changed: U, T
Units group: -
Min
10 [%]
Description: The value influences the rate at which the output frequency is changed during a flying restart . A higher value
results in a longer search time.
Caution: An unfavorable parameter value can result in the motor behaving in an uncontrollable fashion.
For vector control, a value that is too low or too high can cause flying restart to become unstable.
Note: The parameter factory setting is selected so that standard induction motors that are rotating can be found and
restarted as quickly as possible (fast flying restart).
With this pre-setting, if the motor is not found (e.g. for motors that are accelerated as a result of active loads or with
U/f control and low speeds), we recommend that the search rate is reduced (by increasing p1203).
1-156
Calculated: -
Scaling: -
Unit selection: -
Max
400 [%]
Calculated: -
Scaling: -
Unit selection: -
Max
400 [%]
Calculated: -
Scaling: -
Unit selection: -
Max
4000 [%]
SINAMICS G120 Control Units CU230P-2 Parameter Manual (LH9), 01/2011
Data type: FloatingPoint32
Data set: DDS, p0180
Factory setting
90 [%]
Data type: FloatingPoint32
Data set: DDS, p0180
Factory setting
100 [%]
Data type: FloatingPoint32
Data set: DDS, p0180
Factory setting
150 [%]
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