Setting Encoderless Actual Value Sensing - Siemens SINAMICS G120 Function Manual

5.7.1.4

Setting encoderless actual value sensing

Procedure
To set the encoderless actual value sensing, proceed as follows:
1. Press the "Configuration" button.
2. Press the "Configuration actual value sensing" button.
3. Set the following:
4. Close the screen forms.
You have set the encoderless actual value sensing.
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
Function Manual, 04/2014, FW V4.7, A5E34261271B AA
①
– 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).
②
– Minimum current actual value sensing:
In most cases, you do not have to change this 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.
③
– 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%.
④
– 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.
Commissioning
5.7 Setting extended functions
109