ABB ACS880 Firmware Manual page 154

154 Parameters
No. Name/Value
21.07 Zero speed delay
0 ... 30000 ms
Description
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.
Time
limit, the zero speed delay
Speed controller remains
active. Motor is decelerated to
true zero speed.
Time
Def/FbEq16
0 ms
1 = 1 ms