Elettronica Santerno SINUS/ISD 200 S-0.75, User Manual, Page: 86 / 206

15P0082B8
USER MANUAL
SINUS/ISD
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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 Inverter 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 Inverter will ramp to the speed
setpoint from zero.
The flycatching sequence can be triggered by different starting conditions:
ALWAYS: All starts (after controlled or uncontrolled stop, or after a power-up)
TRIP or POWER-UP: After uncontrolled stop, i.e. trip or coast, or after a power-up
TRIP: After uncontrolled stop, i.e. trip or coast
The type of speed sequence may be Bidirectional or Unidirectional:
Bidirectional
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.
ACTIVE
Range: FALSE / TRUE
A diagnostic output indicating whether the flycatching sequence is active.
SETPOINT
Range xxx.xx %
This diagnostic output is the setpoint caught at the end of a successful flycatching
sequence.