ABB ACS 160, User Manual

Page: 81 / 138

ACS 160 User’s Manual 71
Group 21: Start/Stop
ACS 160 supports several start and stop modes, including flying start and torque boosting at start.
DC current can be injected either before the start command (premagnetising) or automatically right
after the start command (starting with DC hold).
DC hold can be used when stopping the drive with ramp. If drive is stopping by coasting, DC brake
can be used.
Note! Too long a DC injection time or premagnetising time causes the motor to heat up.
Code Description
2101 START FUNCTION
Conditions during motor acceleration.
1 =
RAMP
Ramp acceleration as set.
2 =
FLYING
Flying start. Use this setting if the motor is already rotating and the drive will start smoothly at the current
frequency. The drive will automatically search the correct output frequency.
3 =
TORQUE BOOST
Automatic torque boost might be necessary in drives with high starting torque. Torque boost is only applied
at start. Boosting is stopped when output frequency exceeds 20 Hz or when output frequency is equal to
reference. See also parameter 2103
TORQ BOOST CURR
.
4 =
FLY
+
BOOST
Activates both the flying start and torque boost.
Note! If torque boost is used the switching frequency is always 4 kHz. In this case parameter 2605
LOW
NOISE
is ignored.
2102 STOP FUNCTION
Conditions during motor deceleration.
1 =
COAST
Motor coasts to stop.
2 =
RAMP
Ramp deceleration as defined by the active deceleration time 2203
DECELER TIME
1 or 2205
DECELER TIME
2.
2103 TORQ BOOST CURR
Maximum supplied current during torque boost. See also parameter 2101
START FUNCTION
.
2104 STOP DC INJ TIME
DC injection time after modulation has stopped. If 2102
STOP FUNCTION
is 1 (
COAST
), ACS 160 uses DC
braking. If 2102
STOP FUNCTION
is 2 (
RAMP
), ACS 160 uses DC hold after ramp.
2105 PREMAGN SEL
Options 1- 5 select source for premagnetising command. Option 6 selects start with DC hold.
0 =
NOT SEL
Premagnetising not used.
1...5 = DI1...DI5
Premagnetising command is received through a digital input.
6 =
CONST
Constant premagnetising time after start command. Time is defined by parameter 2106
PREMAGN MAX TIME
.
2106 PREMAGN MAX TIME
Maximum premagnetising time.