ABB ACS880 - Page 255

Def / Type
FbEq 16b / 32b
DescriptionName / Range /
Selection
No.
0 ms / real32Defines 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 21.6 Zero speed limit, inverter modulation is
stopped and the motor coasts to a standstill.
Speed controller switched off:
Motor coasts to a stop.
21.06
Time
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 21.6 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.
Speed
Speed controller remains active.
Motor is decelerated to true zero
speed.
Time
21.06
Delay
Zero speed delay21.7
1 = 1 ms / 1 = 1 msZero speed delay.0...30000 ms
Parameters 255