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VLT ® MICRO
Pr.01 Operation Command Source Select
Factory Setting d00
Units None
Settings d00 Operating instructions determined by the Digital Keypad/Display.
d01 Operating instructions determined by the External Control Terminals.
Keypad STOP key is effective.
d02 Operating instructions determined by the External Control Terminals.
Keypad STOP key is not effective.
(Refer to parameters 38, 39, 40, 41 and 42 for more details.)
Pr.02 Motor Stop Method Select
Factory Setting d00
Units None
Settings d00 Ramp stop
d01 Coast to stop
This parameter determines how the motor is stopped when the AC drive receives a valid
stop command.
Ramp: The AC drive output frequency decelerates down to the minimum output
frequency (Pr.08) in the time specified by Pr.11 or Pr.13, then the output is turned off.
Coast: The AC drive output is turned off immediately and the motor free runs until it
comes to a stop.
Ramp Coast
To determine the best method to stop the motor, the type of load needs to be
considered.
1. In many applications operator safety and material processing can be improved when
"Ramp Stop" is selected. The accel./decel. time required will depend on the specific
parameters of your application.
2. The advantage of using "Coast-to-stop" is the motor will heat less during
frequent starting and stopping. Applications where "Coast-to-stop" is commonly
used are fans, pumps, blowers, mixing and agitating.
Frequency command
sec. sec.
Speed
Stop command Setting value Stop command ?
Speed (Free running to stop)
Frequency command
Hz Hz
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