Checking The Commutation Angle Offset With An Oscilloscope - Siemens Sinamics s120 Commissioning Manual

Commissioning
3.13 Commissioning of SIMOTICS L-1FN3 linear motors
Checking the pole position identification
You can check the pole position identification with p1983 in the finely-synchronized state.
1. Position the drive at different points in an electrical period (pole pitch) and set parameter
p1983 = 1. For example, start at 0° and perform a measurement every 30°.
This means that a pole position identification is performed again and the deviation
determined is displayed in parameter p1984.
After completion of the pole position identification, parameter p1983 is set to 0 again. The
angular difference read out of parameter p1984 must lie in the interval [-10°...+10°].
The average of the measured angle differences must be added to the commutation angle
offset entered in p0431. (Note the sign of the commutation angle offset.)
For a change to parameter p0431, p0010 must be set to 4 (see the "Representation of
the tolerance field for the pole position angle (Page 216)" figure).
2. Perform a coarse and fine synchronization again. The fine synchronization is not
applicable for an absolute measuring system.
3.13.6.2

Checking the commutation angle offset with an oscilloscope

Checking the EMF voltages
If you have commissioned the motor according to the appropriate instructions, and in spite of
this, unexpected messages are output, you must first check the individual EMF voltages of
the motor. To do this, the following techniques are described:
● "Record the phase voltage and the pole position angle using an oscilloscope"
● "Record the phase voltage and the pole position angle using the STARTER trace
function"
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STARTER Commissioning Manual
Commissioning Manual, (IH1), 07/2016, 6SL3097-4AF00-0BP5