Torque Preset; Upper And Lower Frequency Limit In Torque Control - BONFIGLIOLI ACTIVE CUBE 201 Operating Instructions Manual

18.5.3.1 Torque preset

The reference torque can be specified as follows:
Set parameter
n-/M-Control Change-Over
Select the torque preset source via parameter
494.
Percentage Source 2
For example:
 The reference torque can be set via the arrow keys of the control panel if the following setting
is selected:
Reference Percentage Source 2
 The reference torque can be set via multifunction input 1 (MFI1A) if the following setting is
selected:
Reference Percentage Source 1
 100 % torque refer to torque calculated from
372 (rated motor speed).
Rated Speed
Parameter 224 shows the actual torque value.
Torque
Select setting of parameter
Chapter 13.5 "13.5".

18.5.3.2 Upper and lower frequency limit in torque control

In many situations, the speed must be limited at operating points with reduced or without load
torque, as the speed is adjusted according to the preset torque and the load behavior. To avoid
unwanted speeds (in most cases excessive speed, but sometimes low speeds, too, and to avoid
current impression), the speed is limited by the speed controller via
Frequency Lower Limit
As from the limit, the speed is adjusted to the maximum (
Frequency Lower Limit
the controller limits the speed to the
controller – changes of the speed controller affect the speed behavior in the limit range of the 3
parameters mentioned accordingly.
In current impression mode, the frequency is also limited to the
torque control mode, this limit is not active.
Parameter
No. Description
767 Frequency upper limit
768 Frequency lower limit
Positive values limit clockwise speed, negative values limit anticlockwise speed. If, for
example, both values are positive (> 0 Hz), anticlockwise operation will be disabled.
WARNING
If torque control is activated while the torsional frequency is outside the range
between
machine is started from standstill or a quickly rotating machine is stopped quickly),
the permissible speed range will be approached without ramps by means of the
speed controller. In this case, the torque is only limited by the limitations of the
speed controller (current and torque). For this reason, there may be unexpected
dynamic behavior.
12/16
164 to "6 - On" or link it to a digital signal and turn it on.
Operation Mode Search Run
768.
768) which corresponds to the behavior of the speed controller. In addition,
Maximum Frequency
-599.00 Hz
-599.00 Hz
Frequency Upper Limit
Operating Instructions ACU
Reference Percentage Source 1
494 = "5 - KeyPad-Motorpoti" (factory setting).
476 = "1 - Analog value MFI1A" (factory setting).
Rated mech. power
645 according to the application. See
Frequency Upper Limit
Frequency Upper Limit
419. This limitation is done by the speed
Minimum Frequency
Setting
Min. Max.
599.00 Hz
599.00 Hz
767 and
Frequency Lower Limit
476 or
Reference
376 (motor power) and
767 and
767 and
418– in direct
Factory setting
599.00 Hz
-599.00 Hz
768, (e.g. when a
225