Siemens SINAMICS S120 Function Manual page 100

Servo control
3.12 Motor data identification
Determined data
Note regarding r1950 to p1953:
Active when the function module "extended torque control" is activated and activated compensation of the voltage
emulation error (p1780.8 = 1).
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.
-
Note:
If the encoder inversion is changed using MotID, fault F07993 is output, which refers to a possible change in the direction
of rotation and can only be acknowledged by p1910 = -2.
Table 3- 15 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 travel distances in one direction.
100
Data that are accepted (p1910 = 1)
-
p0431 Angular commutation offset
p0410 Encoder inversion actual value
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
Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5
Drive functions