Siemens SINAMICS G120 Operating Instructions Manual page 258

Advanced commissioning
6.5 Motor control
Advanced settings
Parameter
p1226
p1560
p1561
p1562
p1563
p1564
p5310
r5311
p5312
p5313
p5314
p5315
258
Explanation
Standstill detection, speed threshold (Factory setting: 20 rpm)
The moment of inertia estimator only measures the load torque for speeds ≥ p1226.
p1226 also defines from which speed the inverter switches-off the motor for OFF1
and OFF3.
Moment of inertia estimator accelerating torque threshold value (factory setting: 10%)
Moment of inertia estimator change time
inertia (factory setting: 500 ms)
Moment of inertia estimator change time
load (factory setting: 10 ms)
Moment of inertia estimator load torque positive direction of rotation(factory setting:
0 Nm)
Moment of inertia estimator load torque negative direction of rotation(factory setting:
0 Nm)
Moment of inertia precontrol configuration (factory setting: 0000 bin)
.00 1 signal: Activates calculation of the characteristic (p5312 ... p5315)
.01 1 signal: Activates moment of inertia precontrol
p5310.00 = 0, p5310.01 = 0
p5310.00 = 1, p5310.01 = 0
p5310.00 = 0, p5310.01 = 1
p5310.00 = 1, p5310.01 = 1
Moment of inertia precontrol status word
.00 1 signal: New measuring points for the characteristic of the moment of inertia
precontrol are available
.01 1 signal: New parameters are been calculated
.02 1 signal: Moment of inertia precontrol active
.03 1 signal: The characteristic in the positive direction of rotation has been calcu-
lated and is ready
.04 1 signal: The characteristic in the negative direction of rotation has been calcu-
lated and is ready
.05 1 signal: The inverter writes actual results to the parameter
Moment of inertia precontrol linear positive (factory
setting: 0 1/s )
2
Moment of inertia precontrol constant positive (fac-
tory setting: 0 kgm )
2
Moment of inertia precontrol linear negative (factory
setting: 0 1/s )
2
Moment of inertia precontrol constant negative
(factory setting: 0 kgm )
2
The lower that p1561 or p1562 is, the
shorter the moment of inertia estimator
measurements.
The larger p1561 or p1562 is, the more
accurate the results provided by the
moment of inertia estimator.
Deactivating moment of inertia precontrol
Adapting the moment of inertia precontrol
Activating the moment of inertia precontrol.
The characteristic of the moment of inertia
precontrol remains unchanged.
Activating the moment of inertia precontrol. The
inverter adapts the characteristic in parallel.
Converter with the CU240B-2 and CU240E-2 Control Units
Operating Instructions, 01/2016, FW V4.7 SP6, A5E34259001B AC
In a positive direction of rota-
tion:
Moment of inertia = p5312 ×
load torque + p5313
In a negative direction of rota-
tion:
Moment of inertia = p5314 ×
load torque + p5315