ABB ACS800 Firmware Manual page 179

Index Name/Selection
21.08 SCALAR FLY START
NO
YES
21.09 START INTRL FUNC
OFF2 STOP
OFF3 STOP
21.10 ZERO SPEED DELAY Defines the delay for the zero speed delay function. The function is useful in
0.0 ... 60.0 s
Description
Activates the flying start feature in the Scalar control mode. See parameters
21.01 and 99.04.
Inactive
Active
Defines how the Start Interlock input on the RMIO board affects the drive
operation.
Note: In the Master/Follower mode, the settings must be the same in both the
Master and the Follower drives.
Drive running: 1 = Normal operation. 0 = Stop by coasting.
Drive stopped: 1 = Start allowed. 0 = No start allowed.
Restart after OFF2 STOP: Input is back to 1 and the drive receives rising edge
of the Start signal.
Drive running: 1 = Normal operation. 0 = Stop by ramp. The ramp time is
defined with parameter 22.07 EM STOP RAMP.
Drive stopped: 1 = Normal start. 0 = No start allowed.
Restart after OFF3 STOP: Start Interlock input = 1 and the drive receives rising
edge of the Start signal.
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
Time
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 inverter 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
actual motor 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 inverter modulates, motor is magnetised and the drive is
ready for a quick restart.
Delay time
With Zero Speed Delay
Speed
Speed controller remains live.
Motor is decelerated to true 0
speed.
Zero Speed
Time
Delay
Actual signals and parameters
179
FbEq
0
65535
1
2
10 = 1 s