ABB ACQ550-U1-011A-6, Руководство пользователя

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ACQ550-U1 User’s Manual 115
Parameters
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.
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
STOP FUNCTION
must be 2 =
RAMP
for zero speed delay to operate.
0.0 =
NOT SEL
– Disables the Zero Speed Delay function.
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
START DELAY
= zero, the delay is disabled.
• During the Start delay, alarm 2028
START DELAY
is shown.
Code Description
Speed
t
Zero Speed
Speed
t
Zero Speed
Delay
No Zero Speed Delay With Zero Speed Delay
Speed controller switched off:
Motor coasts to stop. Speed controller remains live.
Motor is decelerated to true 0 speed.