Functional Description - Parker AC30 Série Mode D'emploi

Parameter Name No.
The level of search boost applied to the motor during the speed search phase of the flycatching sequence.
Search Time 0316
Only under VHz Control
The search rate during the speed search phase of the flycatching sequence. Performing the flycatching speed search too quickly can
cause the drive to inaccurately identify the motor speed. Refluxing at an inaccurate motor speed can cause the drive to trip on
overvoltage. If this occurs, increasing this parameter will reduce the risk of tripping.
Min Search Speed 0317
Only under VHz Control
The lowest search speed before the speed search phase of the flycatching sequence is considered to have failed.
Flying Reflux Time 0318
Only under VHz Control
The rate of rise of volts from the search level to the working level after a successful speed search. Refluxing the motor too quickly can
cause the Drive to trip on either overvoltage or overcurrent. In either case, increasing this parameter will reduce the risk of tripping.

Functional Description

The flycatching function enables the drive to be restarted smoothly into a spinning motor. It applies small search voltages to the motor whilst ramping
the Drive frequency from maximum speed to zero. When the motor load goes from motoring to regenerating, the speed search has succeeded and
is terminated. If the search frequency falls below the minimum search speed, the speed search has failed and the Drive will ramp to the speed
setpoint from zero.
The flycatching sequence can be triggered by different starting conditions:
ALWAYS:
TRIP or POWER-UP:
TRIP:
The type of speed sequence may be Bi-directional or Unidirectional:
Bi-directional
Initially, the search is performed in the direction of the speed setpoint. If the drive fails to identify the motor speed in this direction, a second speed
search is performed in the reverse direction.
Unidirectional
The search is performed only in the direction of the speed setpoint.
AC30 series Variable Speed Drive
Path
Parameters::Motor Control::Flycatching
Parameters::Motor Control::Flycatching
Parameters::Motor Control::Flycatching
All starts (after controlled or uncontrolled stop, or after a power-up)
After uncontrolled stop, i.e. trip or coast, or after a power-up
After uncontrolled stop, i.e. trip or coast
Parameter Reference
Default Range
3.000 0.100 to 60.000
5 0 to 500
2.000 0.100 to 10.000
D-83
Units Writable
s ALWAYS
Hz ALWAYS
ALWAYS
s