ABB ACS800 Series Firmware Manual page 94

82
No. Name/Value
21.04 DC HOLD
NO
YES
21.05 DC HOLD SPEED
0...3600 rpm
21.06 DC HOLD CURR
0.0...100.0%
21.09 E-STOP MODE
STOP RAMPING
STOP TORQ
COAST STOP
Actual signals and parameters
Description
Activates/deactivates the DC hold function.
When both the reference and the speed drop below 21.05, DC HOLD
SPEED the drive will stop generating sinusoidal current and start to
inject DC into the motor. The current is set by
When the reference speed exceeds 21.05, normal drive operation
continues.
SPEED
motor
Ref.
DC HOLD SPEED
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. See section
Function inactive.
Function active.
Defines the DC Hold speed. See
Speed in rpm.
Defines the DC hold current. See
Current in percent of the motor nominal current.
The drive stopping method when an e-stop command has been
received.
The drive ramps to zero speed in the time set by
TIME. When the drive reaches zero speed it will turn off (remove
RUN).
The drive decelerates to zero speed at torque limit. When the drive
reaches zero speed it will turn off (remove RUN).
The drive coasts to a stop (immediate removal of RUN).
21.06 DC HOLD CURR.
DC Hold
DC Hold on page 33.
21.04 DC HOLD.
21.04 DC HOLD.
22.07 E-STOP RAMP
FbEq
t
t
0
65535
1 = 1 rpm
1 = 1%
1
2
3