Siemens SINAMICS G115D Operating Instructions Manual page 274

Advanced commissioning
6.18 Motor control
Parameter
r1407.0...27
r1493
p1496[0...n]
p1502[0...n]
p1755[0...n]
Advanced settings
Parameter
p1226[0...n]
p1560[0...n]
p1561[0...n]
p1562[0...n]
272
Description
CO/BO: Status word
speed controller
CO: Moment of inertia
total, scaled [kgm ]
2
Acceleration precontrol
scaling [%]
BI: Freeze moment of
inertia estimator
Motor model changeover
speed encoderless opera-
tion [rpm]
Description
Threshold for zero speed
detection [rpm]
Moment of inertia esti-
mator accelerating
torque threshold value
[%]
Change time for moment
of inertia for moment of
inertia estimator [ms]
Change time for the load
torque for moment of
inertia estimator [ms]
Setting
Display and BICO output for the status word of the speed control-
ler.
.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
Sets the signal source to freeze the estimated moment of
inertia.
0 signal: Moment of inertia estimator is active
1 signal: Determined moment of inertia is frozen
If the load torque changes when accelerating the motor,
set this signal to 0.
Factory setting: 0
Defines the switchover between open-loop and closed-loop con-
trolled operation of the encoderless vector control.
When selecting the closed-loop speed control, the con-
verter sets p1755 = 13.3% × rated speed.
Factory setting: 210000.00
Setting
Sets the speed threshold for the standstill identification.
The moment of inertia estimator only measures the load
torque for speeds ≥ p1226.
p1226 also defines from which speed the converter
switches-off the motor for OFF1 and OFF3.
Factory setting: 20
Sets the threshold for the accelerating torque for the mo-
ment of inertia estimator.
Factory setting: 10
Sets the change time for the
moment of inertia for the mo-
ment of inertia estimator.
Factory setting: 500
Sets the change time for the load
torque for the moment of inertia
estimator.
Factory setting: 10
Operating Instructions, 12/2020, FW V4.7 SP13, A5E48681219B-002
The lower that p1561
or p1562 is, the shorter
the moment of inertia
estimator measure-
ments.
The larger p1561 or
p1562 is, the more
accurate the results
provided by the mo-
ment of inertia estima-
tor.
SINAMICS G115D distributed drive