Speed Filter; Offset - BONFIGLIOLI Active Cube User Manual

8.4.5 Speed filter

Via parameter
of the encoder signals and limit the control band width.
No.
1189 Abs. Encoder: Filter time constant

8.4.6 Offset

In order to enable the start of a synchronous machine, the absolute position of the
rotor must be known. This information is required in order to actuate the stator wind-
ings in the right order depending on the position of the rotor. The position of the rotary
field in the synchronous machine must be controlled in order to obtain a continuous
movement of the rotor. During first commissioning, the position of the rotor winding of
the encoder is adjusted to the rotor displacement angle of the synchronous motor by
adjusting the offset. For operating a synchronous machine with encoder, the offset
must be adjusted in order to obtain perfectly true running and a maximum torque.
The correct
same in both directions when the motor is turning and comes as close as possible to
the value 0. Also note the fine setup instructions at the end of this chapter.
No.
1188 Offset
The offset can be determined and adjusted as follows:
• During first commissioning "SEtUP" will be displayed in the control unit. Press
ESC to stop this operation. The guided commissioning ("SETUP") is performed
after adjusting the offset.
• Open the parameter menu "PARA" and enter the machine data indicated on
the type plate or the data sheet of the motor.
Before adjusting the offset, take the following safety precautions :
• Turn of release of the frequency inverter via the digital inputs for controller re-
lease.
• If possible, uncouple the motor from the load so that the motor shaft turns
freely. If installed, release the mechanical brake.
If uncoupling is not possible, make sure that the motor is loaded as little as possi-
ble.
Warning!
• Set the max. permissible output frequency of the frequency inverter to a low
frequency value via parameter
quency value such that uncontrolled acceleration of the motor ("overspeeding")
is detected at an early stage. This limitation is necessary in order to avoid per-
sonal and material damage.
102
Abs. Encoder: Filter time constant
Parameters
Description
1188 is adjusted when the
Offset
Parameters
Description
In certain circumstances, the motor speed may reach high values. If the
motor is not uncoupled from the load, personal and material damage may
result. To avoid such damage, make the following settings in any case.
EM-ABS-01 for ACU
1189 , you can filter high frequency
Settings
Min. Max.
125 µs 8000 µs
Flux-forming voltage
Settings
Min. Max.
-360,0° 360,0°
Shutdown limit frequency
Factory set-
ting
125 µs
235 is roughly the
Factory set-
ting
0,0°
417 . Select the fre-
03/12