Siemens SINAMICS G115D Operating Instructions Manual page 247

Procedure
1. Set p1400.18 = 1
2. Check: p1496 ≠ 0
3. Activate the acceleration model of the speed controller pre-control: p1400.20 = 1.
You have activated the moment of inertia estimator.
❒
The most important settings
Parameter
r0333[0...n]
p0341[0...n]
p0342[0...n]
p1400[0...n]
r1407.0...27
r1493
p1496[0...n]
SINAMICS G115D distributed drive
Operating Instructions, 09/2020, FW V4.7 SP13, A5E48681219B
Description
Rated motor torque [Nm]
Motor moment of inertia
[kgm ]
2
Ratio between the total and
motor moment of inertia
Speed control configuration
CO/BO: Status word speed
controller
CO: Moment of inertia total,
scaled [kgm ]
2
Acceleration precontrol scal-
ing [%]
Setting
Displays the rated motor torque.
Sets the motor moment of inertia (without load).
Note: The converter sets the parameter when selecting
a listed motor. The parameter is then write-protected.
Factory setting: 0
Sets the ratio of moment of inertia load + motor to
moment of inertia of motor without load.
Factory setting: 1
Sets the configuration for the closed-loop speed con-
trol.
.18 1 signal: Moment of inertia estimator active
.20 1 signal: Acceleration model on
.22 1 signal: Moment of inertia estimator retain value
when motor switched off
.24 1 signal: Shortened moment of inertia estimation is
active.
p1400.24 = 1 reduces the duration of the moment of
inertia estimation.
Disadvantage: If the accelerating torque is not constant
while calculating the moment of inertia, the calculation
of the moment of inertia using p1400.24 = 1 is less
precise.
Display and BICO output for the status word of the
speed controller.
.24 1 signal: Moment of inertia estimator is active
.25 1 signal: Load estimator is active
.26 1 signal: Moment of inertia estimator is engaged
.27 1 signal: Shortened moment of inertia estimation is
active.
Display and connector output for the parameterized
total moment of inertia.
r1493 = (p0341 × p0342) × p1496
Sets the scaling for the acceleration precontrol of the
speed/velocity controller.
According to rotating measurement of the motor data
identification is p1496 = 100%.
Factory setting: 0
Advanced commissioning
6.17 Motor control
245