ABB ACS580 - Page 203

Parameters 199
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 eg with the jogging function.
0…30000 ms Zero speed delay. 1 = 1 ms
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
ACS580 FW.book Page 199 Wednesday, September 21, 2016 9:48 PM