ASFIFF12 High Speed
vacon • 33
24-hour s358 (0)40 837 1150 • Email: [email protected]
505 Start
function
(2.4.6)
Ramp:
0
The frequency converter starts from 0 Hz and accelerates to the set reference
frequency within the set
. (Load inertia or starting friction may
cause prolonged acceleration times).
Flying start:
1
The frequency converter is able to start into a running motor by applying a
small torque to motor and searching for the frequency corresponding to the
speed the motor is running at. Searching starts from the maximum frequency
towards the actual frequency until the correct value is detected. Thereafter, the
output frequency will be increased/decreased to the set reference value
according to the set acceleration/deceleration parameters.
Use this mode if the motor is coasting when the start command is given. With
the flying start it is possible to ride through short mains voltage interruptions.
506 Stop
function
(2.4.7)
Coasting:
0
The motor coasts to a halt without any control from the frequency converter,
after the Stop command.
Ramp:
1
After the Stop command, the speed of the motor is decelerated according to
the set deceleration parameters.
If the regenerated energy is high it may be necessary to use an external
braking resistor for faster deceleration.
Normal stop: Ramp/ Run Enable stop: coasting
2
After the Stop command, the speed of the motor is decelerated according to
the set deceleration parameters. However, when Run Enable is selected, the
motor coasts to a halt without any control from the frequency converter.
Normal stop: Coasting/ Run Enable stop: ramping
3
The motor coasts to a halt without any control from the frequency converter.
However, when Run Enable signal is selected, the speed of the motor is
decelerated according to the set deceleration parameters. If the regenerated
energy is high it may be necessary to use an external braking resistor for
faster deceleration.
507 DC-braking
current
(2.4.8)
Defines the current injected into the motor during DC-braking.
NOTE! The Max value for this parameter might differ for FR9 and bigger, and for NXLC.
508
DC-braking time at stop
(2.4.9)
Determines if braking is ON or OFF and the braking time of the DC-brake when the
motor is stopping. The function of the DC-brake depends on the stop function, parameter
.
0
DC-brake is not used
>0
DC-brake is in use and its function depends on the Stop function,
(param.
). The DC-braking time is determined with this parameter.