Motor Data Identification For Synchronous Motors - Siemens SINAMICS S120 Function Manual

Determined data (gamma)
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).
5.15.2

Motor data identification for synchronous motors

Table 5-13
Determined data
r1912 stator resistance identified
r1925 threshold voltage identified
r1932 d inductance
r1934 q inductance identified
r1950 voltage emulation error voltage values p1952 voltage emulation error final value + p1953 volt‐
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 dif‐
ference
Note:
r1984 indicates the difference of the angular commutation offset before being transferred into p0431.
-
Note:
If the encoder inversion is changed using motor data identification, fault F07993 is output, which refers
to a possible change in the direction of rotation - and can only be acknowledged using p1910 = -2.
Drive functions
Function Manual, 06/2019, 6SL3097-5AB00-0BP2
Data determined using p1910 for synchronous motors (standstill measurement)
5.15 Motor data identification
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
-
Data that are accepted (p1910 = 1)
p0350 motor stator resistance cold + p0352 cable re‐
sistance
-
p0356 motor stator leakage inductance + p0353 motor
series inductance
p1715 current controller P gain
p1717 current controller integral time
-
age emulation error current offset + p1954 voltage em‐
ulation error semiconductor voltage
-
p0431 commutation angle offset
p0410 encoder inversion actual value
Servo control
147