SKS Sweden Bonfiglioli Vectron ACTIVE CUBE ACU 201 Series, Operating Instructions Manual

Page: 223 / 260

09/08
Operating Instructions ACU
221
17.6 V-belt Monitoring
Continuous monitoring of the load behavior and thus of the connection between the
3-phase machine and the load is the task of the V-belt monitoring system. The para-
meter
Operation mode
581 defines the function behavior if the
Active current
214
(sensorless control) or the torque-forming current component
Isq
216 (field-oriented
control method) is below the set
Trigger limit Iactive
582 for longer than the para-
meterized
Delay time
583.
Operation mode
581 Function
0 - Off The function is deactivated.
1 - Warning
If the active current drops below the threshold value,
the warning "A8000" is displayed.
2 - Error
The unloaded drive is switched off and fault message
"F0402" is displayed.
The error and warning messages can be read out by means of the digital outputs
(signal 22 - “Warning V-Belt”) or reported to an overriding control system. The
Trig-
ger limit Iactive
582 is to be parameterized as a percentage of the
Rated current
371
for the application and the possible operating points.
Parameter Settings
No. Description Min. Max. Fact. sett.
582 Trigger limit Iactive 0.1 % 100.0 % 10.0 %
583 Delay time 0.1 s 600.0 s 10.0 s
17.7 Functions of Field-Orientated Control
The field-orientated control systems are based on a cascade control and the calcula-
tion of a complex machine model. The various control functions can be supplemented
by special functions specific to the application.
17.7.1 Motor Chopper
The field-orientated control systems contain the function for adapted implementation
of the generator energy into heat in the connected three-phase machine. This en-
ables the realization of dynamic speed changes at minimum system costs. The torque
and speed behavior of the drive system is not influenced by the parameterized brak-
ing behavior. The parameter
Trigger threshold
507 of the DC link voltage defines the
switch-on threshold of the motor chopper function.
Parameter Settings
No. Description ACU Min. Max. Fact. sett..
506 Trigger threshold
201 225
1000.0 V
385
401 425 770
Operating Instructions ACU 221 09/08