ABB ACS560 Firmware Manual page 212

212 Parameters
No. Name/Value
21.06 Zero speed limit
0.00...30000.00
rpm
21.07 Zero speed delay
0...30000 ms
Description
Defines the zero speed limit. The motor is stopped along a
speed ramp (when ramped stop is selected or emergency
stop time is used) until the defined zero speed limit is
reached. After the zero speed delay, the motor coasts to a
stop.
Zero speed limit.
Defines the delay for the zero speed delay function. The
function is useful in applications where a smooth and quick
restarting is essential. During the delay, the drive knows the
rotor position accurately.
Without zero speed delay:
The drive receives a stop command and decelerates along
a ramp. When actual motor speed falls below the value of
parameter 21.06 Zero speed
stopped and the motor coasts to a standstill.
Speed
With zero speed delay:
The drive receives a stop command and decelerates along a
ramp. When actual motor speed falls below the value of
parameter 21.06 Zero speed
function activates. During the delay the function keeps the
speed controller live: the inverter modulates, motor is
magnetized and the drive is ready for a quick restart. Zero
speed delay can be used e.g. with the jogging function.
Speed
Delay
Zero speed delay.
limit, inverter modulation is
Speed controller switched off:
Motor coasts to a stop.
21.06 Zero speed limit
Time
limit, the zero speed delay
Speed controller remains
active. Motor is decelerated to
true zero speed.
21.06 Zero speed limit
Time
Def/FbEq16
30.00 rpm
See par.
46.01
0 ms
1 = 1