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ACH550-01 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. The valid options depend on the value
of parameter 9904
1 =
– Selects the automatic start mode.
AUTO
•
:
VECTOR
SPEED
function to a rotating axis and start at zero speed.
•
:
SCALAR
FREQ
2 =
DC MAGN
selection 8 =
Note: The DC Magnetising start mode cannot start a rotating motor.
Note: The drive starts when the set pre-magnetising time (parameter
2103
DC MAGN TIME
complete.
•
:
VECTOR
SPEED
determined by parameter 2103
normal control is released exactly after the magnetising 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 magnetising time.
3 =
SCALAR FLYST
only.
• The drive will automatically select the correct output frequency to
start a rotating motor. Useful if the motor is already rotating and the
drive will start smoothly at the current frequency.
• Cannot be used in multimotor systems.
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 magnetises 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 magnetised. If
the speed is found to be zero, the torque boost is done.
8 =
– Immediate start from zero frequency.
RAMP
Parameter listing and descriptions
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MOTOR CTRL MODE
mode: Optimal start in most cases. Flying start
mode: Immediate start from zero frequency.
– Selects the DC Magnetising start mode. Identical to
.
RAMP
) has passed, even if motor magnetisation is not
mode: Magnetises the motor within the time
mode: Magnetises the motor within the time
– Selects the flying start mode.
– 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...8
.
using DC current. The
DC MAGN TIME
using DC current.
DC MAGN TIME
SCALAR
using DC current.
.
:
mode
FREQ
225
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