ABB ACH550-01 User Manual page 231

ACH550 User's Manual
Group 21: START/STOP
This group defines how the motor starts and stops. The ACH550
supports several start and stop modes.
Code Description
2101 START FUNCTION
Selects the motor start method.
1 = – Selects the automatic start mode.
AUTO
• :
VECTOR SPEED
function to a rotating axis and start at zero speed.
• :
SCALAR FREQ
2 =
DC MAGN
Note: The DC Magnetizing start mode cannot start a rotating motor.
Note: The drive starts when the set pre-magnetizing time (parameter
2103) has passed, even if motor magnetization is not complete.
• :
VECTOR SPEED
determined by parameter 2103
normal control is released exactly after the magnetizing time. This
selection guarantees the highest possible break-away torque.
• :
SCALAR FREQ
determined by the parameter 2103
The normal control is released exactly after the magnetizing time.
3 =
SCALAR FLYST
• :
VECTOR SPEED
• :
SCALAR FREQ
output frequency to start a rotating motor. Useful if the motor is
already rotating and the drive will start smoothly at the current
frequency.
4 =
TORQ BOOST
( :
SCALAR FREQ
• May be necessary in drives with high starting torque.
• Torque boost is only applied at start, ending when the output
frequency exceeds 20 Hz or when output frequency is equal to
reference.
• In the beginning the motor magnetizes within the time determined
by the parameter 2103
• See parameter 2110
5 = +
FLY BOOST
mode (
SCALAR
• Flying start routine is performed first and the motor is magnetized. If
the speed is found to be zero, the torque boost is done.
Parameter listing and descriptions
mode: Optimal start in most cases. Flying start
mode: Immediate start from zero frequency.
– Selects the DC Magnetizing start mode.
mode: Magnetizes the motor within the time
mode: Magnetizes the motor within the time
– Selects the flying start mode.
mode: Not applicable.
mode: The drive will automatically select the correct
– Selects the automatic torque boost mode
mode only).
DC MAGN TIME
TORQ BOOST CURR
– Selects both the flying start and the torque boost
: mode only).
FREQ
Range
1...5
using DC current. The
DC MAGN TIME
using DC current.
DC MAGN TIME
using DC current.
.
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