ABB ACS550-02 User Manual page 99

Group 21: Start/Stop
This group defines how the motor starts and stops. The ACS550 supports several
start and stop modes.
Code Description
2101 START FUNCTION
Selects the motor start method.
1 = – Selects the automatic start mode.
AUTO
• Vector control modes: Optimal start in most cases. Flying start function to a rotating axis and start at zero speed.
• : mode: Immediate start from zero frequency.
SCALAR SPEED
2 = – Selects the DC Magnetizing start mode.
DC MAGN
Note! Mode cannot start a rotating motor.
Note! The drive starts when the set pre-magnetizing time (param. 2103) has passed, even if motor magnetization is
not complete.
• Vector control modes: Magnetizes the motor within the time determined by the parameter 2103
using DC current. The normal control is released exactly after the magnetizing time. This selection guarantees
the highest possible break-away torque.
• : mode: Magnetizes the motor within the time determined by the parameter 2103
SCALAR SPEED
using DC current. The normal control is released exactly after the magnetizing time.
3 =
SCALAR FLYSTART
• Vector control modes: Not applicable.
• : mode: The drive will automatically selects the correct output frequency to start a rotating motor.
SCALAR SPEED
Useful if the motor is already rotating and the drive will start smoothly at the current frequency.
4 = – Selects the automatic torque boost mode (
TORQ BOOST
• May be necessary in drives with high starting torque.
• Torque boost is only applied at start, ending when 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
current.
• See parameter 2110
5 = +
FLYSTART TORQ BOOST
• Flying start routine is performed first and the motor is magnetized. If the speed is found to be zero, the torque
boost is done.
2102 STOP FUNCTION
Selects the motor stop method.
1 = – Selects cutting off the motor power as the stop method. The motor coasts to stop.
COAST
2 = – Selects using a deceleration ramp
RAMP
• Deceleration ramp is defined by 2203
2103 DC MAGN TIME
Defines the pre-magnetizing time for the DC Magnetizing start mode.
• Use parameter 2101 to select the start mode.
• After the start command, the drive pre-magnetizes the motor for the time defined here, and then starts the motor.
• Set the pre-magnetizing time just long enough to allow full motor magnetization. Too long a time heats the motor
excessively.
2104 DC CURR CTL
Selects whether DC current is used for braking.
0 = – Disables the DC current operation.
NOT SEL
2 = – Enables the DC Injection Braking after modulation has stopped.
DC BRAKING
• If parameter 2102
• If parameter 2102
2106 DC CURR REF
Defines the DC current control reference as a percentage of parameter 9906 (
2107 DC BRAKE TIME
Defines the DC brake time after modulation has stopped, if parameter 2104 is 2 (
– Selects the flying start mode.
.
TORQ BOOST CURR
– Selects both the flying start and the torque boost mode (
DECELER TIME
is 1 ( ), braking is applied after start is removed.
STOP FUNCTION COAST
2 ( ), braking is applied after ramp.
STOP FUNCTION IS RAMP
: mode only).
SCALAR SPEED
1 or 2206 2 (whichever is active).
DECELER TIME
MOTOR NOM CURR
DC BRAKING
97
DC MAGN TIME
DC MAGN TIME
using DC
DC MAGN TIME
: mode only).
SCALAR SPEED
).
).
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