Actual signals and parameters
184
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
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
on
page
.
If the direction of rotation is reverse, the drive is stopped along a ramp.
4
SPD COMP REV
Speed compensation is used for constant distance braking if the direction of
rotation is reverse. 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
on
page
.
If the direction of rotation is forward, the drive is stopped along a ramp.
5
2103
DC MAGN TIME
Defines the pre-magnetising time. See parameter
START FUNCTION.
After the start command, the drive automatically pre-magnetises the motor
the set time.
0.3
0.00…10.00 s
Magnetising time. Set this value long enough to allow full motor
magnetization. Too long time heats the motor excessively.
1 = 0.01 s
2104
DC HOLD CTL
Activates the DC Hold or DC braking function.
NOT SEL
NOT SEL
Inactive
0
DC HOLD
DC Hold function active. DC Hold is not possible if parameter
MOTOR
CTRL MODE setting is SCALAR:FREQ.
When both the reference and the motor speed drop below the value of
parameter
DC HOLD SPEED, the drive will stop generating sinusoidal
current and start to inject DC into the motor. The current is set by parameter
DC CURR REF. When the reference speed exceeds parameter
value, normal drive operation continues.
Note:
DC Hold has no effect if the start signal is switched off.
Note:
Injecting DC current into the motor causes the motor to heat up. In
applications where long DC hold times are required, externally ventilated
motors should be used. If the DC hold period is long, the DC hold cannot
prevent the motor shaft from rotating if a constant load is applied to the motor.
1
DC BRAKING
DC current braking function active.
If parameter
STOP FUNCTION is set to COAST, DC braking is applied
after the start command is removed.
If parameter
STOP FUNCTION is set to RAMP, DC braking is applied
after the ramp.
2
2105
DC HOLD SPEED
Defines the DC hold speed. See parameter
DC HOLD CTL.
5
0…360 rpm
Speed
1 = 1 rpm
Parameters – complete descriptions
Index Name/Selection
Description
Def, FbEq
t
t
Ref
DC Hold
DC hold speed
Motor speed
Summary of Contents for ACS350 Series
Page 1: ...ACS350 User s Manual ACS350 Drives 0 37 22 kW 0 5 30 HP ...
Page 4: ......
Page 8: ...Safety 8 ...
Page 18: ...Table of contents 18 ...
Page 24: ...Hardware description 24 ...
Page 44: ...Installation checklist 44 ...
Page 56: ...Start up control with I O and ID Run 56 ...
Page 140: ...Program features 140 ...
Page 242: ...Actual signals and parameters 242 ...
Page 266: ...Fieldbus control with embedded fieldbus 266 ...
Page 284: ...Fault tracing 284 ...
Page 288: ...Maintenance and hardware diagnostics 288 ...
Page 309: ...Dimensions 309 Frame size R2 IP20 NEMA 1 3AFE68586658 A Frame size R2 IP20 NEMA 1 VAR EMC ...
Page 311: ...Dimensions 311 Frame size R3 IP20 NEMA 1 3AFE68579872 B Frame size R3 IP20 NEMA 1 VAR EMC ...
Page 313: ......