3. Product description
50
Festo.P.BE-CMMS-ST-HW-EN 0903b
3.5.4
Suppression of ranges
When speeds close to the mechanical natural resonance are reached, there is a speed
jump so that the resonance is skipped. The mechanical natural resonance and the
bandwidth (hysteresis) can be set. Up to three speed ranges can be hidden.
3.5.5
I²t function
An integrator monitors the current²-time integral of the controller CMMS-ST. As soon as
the parameterized time is exceeded, a warning message is output and the maximum
current is limited to the rated current.
Note
With a threshold of I²t = 80 % the warning message "0190 – I²t at
80 %" occurs and the maximum current is limited to the rated
current.
With a threshold of I²t = 100 % the warning message "0310 – I²t
fault motor" occurs and the maximum current is limited to the rated
current.
The I²t time of the motor can be set via the FCT parameterization software.
3.5.6
Positioning controller
A positioning control system is set above the current controller. Up to 64 positions
( 63 positions) can be selected and run via a trajectory generator. There are also
volatile position data records for positioning via the field bus.
The position records are made up of a position value and a motion profile.
The following parameters can be set for the eight motion profiles:
-
Positioning speed
-
Acceleration
-
Delay
-
Smoothing
