ABB ACS550 User Manual page 130

130
Code Description
2112 ZERO SPEED DELAY
Defines the delay for the Zero Speed Delay function. If parameter value is set to zero, the Zero Speed Delay function
is disabled.
The function is useful in applications where a smooth and quick restarting is essential. During the delay the drive
knows accurately the rotor position.
No Zero Speed Delay
Speed
Speed controller switched off:
Motor coasts to stop.
Zero speed delay can be used e.g. with jogging function or mechanical brake.
No Zero Speed Delay
The drive receives a stop command and decelerates along a ramp. When the motor actual speed falls below an
internal limit (called Zero Speed), the speed controller is switched off. The drive modulation is stopped and the motor
coasts to standstill.
With Zero Speed Delay
The drive receives a stop command and decelerates along a ramp. When the motor actual speed falls below an
internal limit (called Zero Speed), the zero speed delay function activates. During the delay the functions keeps the
speed controller live: The drive modulates, motor is magnetized and drive is ready for a quick restart.
Note: Parameter 2102
0.0 = – Disables the Zero Speed Delay function.
NOT SEL
2113 START DELAY
Defines the Start delay. After the conditions for start have been fulfilled, the drive waits until the delay has elapsed
and then starts the motor. Start delay can be used with all start modes.
• If = zero, the delay is disabled.
START DELAY
• During the Start delay, alarm 2028
Parameters
Zero Speed
t
must be 2 =
STOP FUNCTION
START DELAY
With Zero Speed Delay
Speed
Speed controller remains live.
Motor is decelerated to true 0 speed.
Zero Speed
Delay
for zero speed delay to operate.
RAMP
is shown.
ACS550 User's Manual
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