BONFIGLIOLI ACTIVE Cube ACU 401-18 User Manual

17.5.4.3 Integral time speed synchronization
For speed synchronization and in order to increase the speed accuracy, the integrat-
ing portion of the speed control can be set via parameter Integral time speed syn-
chronization
515. The setup is effective in operation modes „4 – speed synchroniza-
tion DG 1“ and „5 – speed synchronization DG 2“ for parameter
Actual speed
source 766.
Parameter
Settings
No.
Description
Min.
Max.
Fact. sett.
515
Integral time speed synch.
1 ms
60000 ms
5000 ms
17.5.5 Acceleration Pre-Control
The acceleration pre-control is active in the speed-controlled configurations and can
be activated via parameter
Operation mode
725.
Operation mode 725
Function
0 - Off The control system is not influenced.
1 - On
The acceleration pre-control is active according to
the limit values.
The acceleration pre-control controlled parallel to the speed controller reduces the
reaction time of the drive system to a change of reference values. The minimum ac-
celeration time defines the modification speed of the reference speed value as from
which a torque necessary for acceleration of the drive is pre-controlled. The accelera-
tion of the mass is a function of the
Mech. time constant 727
of the system. The
value calculated from the increase of the reference value and the multiplica
tion factor
of the torque required is added to the output signal of the speed controller.
Parameter Settings
No.
Description
Min.
Max.
Fact. sett.
726 Minimum acceleration 0.1 Hz/s 6500.0 Hz/s 1.0 Hz/s
727 Mech. time constant 1 ms 60000 ms 10 ms
For optimal setting, the acceleration pre-control is switched on and the mechanical
time constant is set to the minimum value. The output value of the speed controller
is compared to the minimum acceleration time during the acceleration processes. The
freq
uency ramp is to be set to the highest value occurring in operation at which the
output figure of the speed controller is not yet limited. Now, the value of the Mini-
mum acceleration
726
is set to half the set acceleration ramp so that it is ensured
that the acceleration pre-control is active. The acceleration pre-
control is not raised
by increasing the Mech.time constant 727
until the output figure corresponds to the
time modification of the drive during the acceleration processes.
236 Operating Instructions ACU 06/13

BONFIGLIOLI ACTIVE Cube ACU 401-18 Specifications

General

Brand	BONFIGLIOLI
Model	ACTIVE Cube ACU 401-18
Category	Inverter
Language	English