Siemens SINAMICS S120 Function Manual page 104

Operating Modes
Servo control
Synchronous motor
Table 3-13 Data determined using p1910 for synchronous motors (stationary measurement)
Determined data
r1912 stator resistance identified
r1925 threshold voltage identified
r1932 d inductance
r1934 q inductance identified
r1950 voltage emulation error, voltage values
r1951 voltage emulation error, current values
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.
3-104
Data that are accepted (p1910 = 1)
p0350 motor stator resistance, cold
+ p0352 cable resistance
–
p0356 motor stator leakage inductance
+ p0353 motor series inductance
p1715 current controller P gain
p1717 current controller integral action time
–
p1952 voltage emulation error, final value
p1953 voltage emulation error, current offset
–
p0431 angular commutation offset
p0410 encoder inversion actual value
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SINAMICS S120 Function Manual, 03/2006 Edition