Siemens SINAMICS S120 Function Manual page 105

Table 3-14 Data determined using p1960 for synchronous motors (rotating measurement)
Determined data
r1934 q inductance identified
r1935 q inductance identification current
Note:
The q inductance characteristic can be used as basis to manually determine the data for the current
controller adaptation (p0391, p0392 and p0393).
r1937 torque constant identified
r1938 voltage constant identified
r1939 reluctance torque constant identified
r1947 optimum load angle identified
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 angular commutation offset before being transferred into p0431.
For linear motors (p0300 = 4xx), p1959 is pre-set so that only the q inductance, the
angular commutation offset and the high inertia mass are measured (p1959.05 = 1
and p1959.10 = 1), as generally the travel limits do not permit longer traversing
distances in one direction.
© Siemens AG 2006 All Rights Reserved
SINAMICS S120 Function Manual, 03/2006 Edition
Data that are accepted (p1960 = 1)
–
p0316 motor torque constant
p0317 motor voltage constant
p0328 motor reluctance torque constant
p0327 optimum motor load angle
p0341 motor moment of inertia
* p0342 ratio between the total moment of inertia
and that of the motor
+ p1498 load moment of inertia
–
p0431 angular commutation offset
Operating Modes
Servo control
3-105