ABB ACS560 - Page 212

212 Parameters
21.06 Zero speed limit 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.
30.00 rpm
0.00…30000.00
rpm
Zero speed limit. See par.
46.01
21.07 Zero speed delay 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.
0 ms
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 limit, inverter modulation is
stopped and the motor coasts to a standstill.
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 limit, the zero speed delay
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.
0…30000 ms Zero speed delay. 1 = 1
No. Name/Value Description Def/FbEq16
Speed controller switched off:
Motor coasts to a stop.
21.06 Zero speed limit
Speed
Time
Speed controller remains
active. Motor is decelerated to
true zero speed.
21.06 Zero speed limit
Speed
Time
Delay