228 Actual signals and parameters
SCAN +
BOOST
Combines scanning start (starting the drive connected to a
rotating motor) and torque boost. See selections
. If frequency identification fails,
torque boost is used.
Used only when parameter
setting is
.
7
AUTO2
Effective with asynchronous motors and vector:speed and
vector:torque modes. Reduces the motor bumping effect
during the start. Bumping effect can be further reduced with
the ramp stop and DC brake functions (operation also
affected).
Starting can further be smoothened by adjusting the DC
magnetization time up to 1 s (longer times do not apply).
Shorter time increases the breakaway torque but may
amplify the bumping effect.
Motor is started from the last known rotor position. This
reduces the backstroke effect caused by the rotor
reluctance flux.
Used only when parameter
setting is
9
2102 STOP
FUNCTION
Selects the motor stop function. See section
on page
COAST
Stop by cutting off the motor power supply. The motor
coasts to stop.
1
RAMP
Stop along a ramp. See parameter group
2
SPEED COMP Speed compensation is used for constant distance braking.
Speed difference (between used speed and maximum
speed) is compensated by running the drive with current
speed before the motor is stopped along a ramp. See
section
Acceleration and deceleration ramps
on page
3
SPD COMP
FWD
Speed compensation is used for constant distance braking if
the direction of rotation is forward. Speed difference
(between used speed and maximum speed) is
compensated by running the drive with current speed before
the motor is stopped along a ramp. See section
Acceleration and deceleration ramps
on page
.
If the direction of rotation is reverse, the drive is stopped
along a ramp.
4
All parameters
No.
Name/Value
Description
Def/FbEq
Summary of Contents for ACS355 series
Page 1: ...ABB machinery drives User s manual ACS355 drives ...
Page 4: ......
Page 16: ...16 ...
Page 32: ...32 Operation principle and hardware description ...
Page 58: ...58 Electrical installation ...
Page 74: ...74 Start up control with I O and ID run ...
Page 106: ...106 Control panels ...
Page 120: ...120 Application macros ...
Page 178: ...178 Program features ...
Page 338: ...338 Fieldbus control with embedded fieldbus ...
Page 368: ...368 Fault tracing ...
Page 404: ...404 Dimension drawings ...
Page 410: ...410 Appendix Resistor braking ...
Page 434: ...434 Appendix Permanent magnet synchronous motors PMSMs ...