ABB ACS380 Series - Page 156

156 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 ms
No. Name/Value Description Default
FbEq 16
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