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

Page: 117 / 260

09/08
Operating Instructions ACU
115
11.1.1.1 Starting Current
Configurations 110, 111 and 410, 411 and 430 for control of a 3-phase machine use
the starting current impression in operation modes 2, 4, 12 and 14 for the parameter
Operation mode
620. The
Starting current
623 guarantees, in particular for high
start torque, sufficient torque to reach the
Frequency limit
624.
Applications in which high current is permanently needed at a low speed are to be
realized using forced-ventilated motors for thermal reasons.
Parameter Settings
No. Description Min. Max. Fact. sett.
623 Starting Current 0.0 A ü
⋅
I
FUN
I
FUN
11.1.1.2 Frequency Limit
The
Starting current
623 is impressed in configurations 110, 111, 410, 411 and 430
for control of a 3-phase machine until the
Frequency limit
624 is reached. Perma-
nent 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.
Parameter Settings
No. Description Min. Max. Fact. sett.
624 Frequency Limit 0.00 Hz 100.00 Hz 2.60 Hz
11.1.1.3 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
Operating Instructions ACU 115 09/08