Siemens Sinamics G120 Function Manual page 154

Commissioning
5.12 Setting extended functions
– Example: The drive has a gearbox with a load/motor speed ratio = 23/50
– (E) Delay time actual value sensing:
– (F) Minimum current actual value sensing:
– (G) Voltage tolerance acceleration:
– (H) Fault tolerance:
3. Close the screen form.
You have set the encoderless actual value sensing.
Parameter
p9521
p9522
p9542
p9585
p9586
p9588
p9589
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⇒ Value (B) = 23, value (C) = 50 × number of pole pairs (D)
In most cases you do not have to change this value. If you switch on the motor with the
safety functions active (SLS, SDI or SSM) and the inverter responds when switching on
with a safety fault, increase this value in the range 50 % ... 100 % of the motor excitation
build-up time (p0346).
In most cases you do not have to change the setting. When the motor draws a low
current, and the inverter responds with a fault, then reduce this value in steps of 1 %
until the fault no longer occurs.
In most cases you do not have to change this parameter. During acceleration with very
short ramp-up and ramp-down times, if the inverter responds with a safety function fault,
increase this value step-by-step by approx. 10%.
In most cases you do not have to change this parameter. This parameter can suppress
sporadic faults of the safety functions. The parameter defines how often the inverter
tolerates its internal plausibility monitoring per second.
Description
Number of load revolutions (Factory setting: 1)
Denominator for the gearbox ratio between the motor and load.
Number of motor revolutions (Factory setting: 2000 rpm)
Numerator for the gearbox ratio between the motor and load.
Actual value tolerance (Factory setting: 12 °)
Tolerance for the crosswise comparison of the actual position between processor 1 and
2.
Fault tolerance (Factory setting: -1)
Tolerance of the plausibility monitoring of current and voltage angle.
Delay time actual value sensing (Factory setting: 100 ms)
Delay time for evaluating the encoderless actual value sensing after the motor has been
switched on.
Minimum current actual value sensing (Factory setting: 10 %)
Minimum current for encoderless actual value sensing (1 % ≙ 10 mA).
Voltage tolerance acceleration (Factory setting: 100 %)
Acceleration limit to filter discontinuity in the velocity.
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
Function Manual, 01/2017, FW V4.7 SP6, A5E34261271B AD