ABB ACS850-04 - Page 117

Parameters 117
11.03 Stop mode Selects the motor stop function.
Coast Stop by cutting of the motor power supply. The motor coasts
to a stop.
WARNING! If the mechanical brake is used,
ensure it is safe to stop the drive by coasting.
1
Ramp Stop along ramp. See parameter group 22 Speed ref ramp on
page 155.
2
11.04 Dc hold speed Defines the DC hold speed. See parameter 11.06 Dc hold.
0.0 … 1000.0 rpm DC hold speed. 10 = 1 rpm
11.05 Dc hold curr ref Defines the DC hold current in percent of the motor nominal
current. See parameter 11.06 Dc hold.
0 … 100% DC hold current. 1 = 1%
11.06 Dc hold Enables the DC hold function. The function makes it possible
to lock the rotor at zero speed.
When both the reference and the speed drop below the value
of parameter 11.04 Dc hold speed, the drive will stop
generating sinusoidal current and start to inject DC into the
motor. The current is set by parameter 11.05 Dc hold curr ref.
When the reference speed exceeds parameter 11.04 Dc hold
speed, normal drive operation continues.
Notes:
• The DC hold function has no effect if the start signal is
switched off.
• The DC hold function can only be activated in speed
control mode.
• The DC hold function cannot be activated if parameter
99.05 Motor ctrl mode is set to Scalar.
• 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.
Disabled The DC hold function is disabled. 0
Enabled The DC hold function is enabled. 1
11.07 Autophasing mode Selects the way autophasing is performed during the ID run.
See section Autophasing on page 58.
No. Name/Value Description FbEq
Reference
Motor speed
DC hold
11. 04 Dc hold
speed
t
t