Siemens SINAMICS S120 Function Manual page 127
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Determined data
r1969 moment of inertia identified
r1973 encoder pulse number identified
Note:
The encoder pulse number is only determined with a very high degree of inaccuracy (p0407/p0408) and is only suitable for
making rough checks. The sign is negative if inversion is required (p0410.0).
r1984 pole position identification angular difference
Note:
r1984 indicates the difference of the commutation angle offset before being transferred into p0431.
For linear motors (p0300 = 4xx), p1959 is pre-set so that only the q inductance, the
commutation angle offset and the high inertia mass are measured (p1959.05 = 1 and
p1959.10 = 1), as generally the travel limits do not permit longer travel distances in one
direction.
Figure 3-14
Figure 3-15
Drive functions
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
Data that is accepted (p1960 = 1)
p0341 motor moment of inertia
* p0342 ratio between the total moment of inertia and that of the
motor
+ p1498 load moment of inertia
-
p0431 commutation angle offset
Equivalent circuit diagram for induction motor and cable
Equivalent circuit diagram for synchronous motor and cable
Servo control
3.12 Motor data identification
125
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