– Example: The drive has a gearbox with a load/motor speed ratio = 23/50
⇒ Value (B) = 23, value (C) = 50 × number of pole pairs (D)
– (E) Delay time actual value sensing:
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).
– (F) Minimum current actual value sensing:
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.
– (G) Voltage tolerance acceleration:
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%.
– (H) Fault tolerance:
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.
3. Close the screen form.
You have set the encoderless actual value sensing.
Parameter Description
p9521 Number of load revolutions (Factory setting: 1)
Denominator for the gearbox ratio between the motor and load.
p9522 Number of motor revolutions (Factory setting: 2000 rpm)
Numerator for the gearbox ratio between the motor and load.
p9542 Actual value tolerance (Factory setting: 12 °)
Tolerance for the crosswise comparison of the actual position between processor 1 and
2.
p9585 Fault tolerance (Factory setting: -1)
Tolerance of the plausibility monitoring of current and voltage angle.
p9586 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.
p9588 Minimum current actual value sensing (Factory setting: 10 %)
Minimum current for encoderless actual value sensing (1 % ≙ 10 mA).
p9589 Voltage tolerance acceleration (Factory setting: 100 %)
Acceleration limit to filter discontinuity in the velocity.
Commissioning
5.12 Setting extended functions
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
154 Function Manual, 01/2017, FW V4.7 SP6, A5E34261271B AD
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