BONFIGLIOLI ACTIVE Cube ACU 201-01, Operating Instructions Manual

Page: 136 / 292

12.1.1.1 Starting Current
The
Starting current
623 ensures, particularly for high-torque start, a sufficient
torque until the
Frequency limit
624 is reached.
Applications in which high current is permanently needed at a low speed are to be
realized using forced-ventilated motors to prevent thermal overload.
Parameter Settings
No. Description Min. Max. Fact. sett.
623 Starting Current 0.0 A o ⋅ I
FIN
I
FIN
I
FIN
= Nominal Output current of Frequency inverter
o: Overload capability of Frequency inverter
In the following settings, the starting current impression is used for the starting be-
havior:
−
Configuration
30 = 1xx (V/f control of asynchronous motor),
Operation mode
620 =2, 4, 12 or 14
−
Configuration
30= 4xx (FOC of an asynchronous motor)
− Configuration
30= 610 (PMSM: sensor-less field-orientated control -DMC), syn-
chronous motor
12.1.1.2 Frequency Limit
The
Starting current
623 is impressed in configurations 1xx, 4xx and 6xx for control
in the selected configuration until the
Frequency limit
624 is reached. Permanent
operating points below the frequency limit are only admissible if forced-ventilated
motors are used.
The transition to the control method of the selected
configuration
30 takes place
above the frequency limit.
The
Frequency limit
624 is set up automatically during the guided motor commis-
sioning in field oriented control configurations 4xx and 6xx. In V/f control configura-
tions 1xx the parameter
Frequency limit
624 is not changed by the guided motor
commissioning.
Parameter Settings
No. Description Min. Max. Fact. sett.
624 Frequency Limit 0.00 Hz 100.00 Hz 2.60 Hz
12.1.1.3 Brake release time
In order to protect the motor holding brake against damage, the motor may only
start after the brake has been released. Startup to reference speed is affected only
after the
Brake release time
625 has elapsed. The time should be set such that it is
at least as long as the time required for releasing the holding brake. By using nega-
tive values for the parameter, release of the brake is delayed. This can be done in
order to prevent loads from falling down, for example.
Parameter Settings
No. Description Min. Max. Fact. sett.
625 Brake release time -5000 ms 5000 ms 0 ms
136 Operating Instructions ACU 06/13