62
•
VACON
P
ARAMETER
DESCRIPTIONS
Tel. +358 (0)201 2121 • Fax +358 (0)201 212 205
10
GROUP 3. Motor Control
3.2 S
TART
M
ODE
The user can select two start modes for Vacon 10 with this parameter:
0 = Ramp start:
The frequency converter starts from 0 Hz and accelerates to the set frequency
reference within the set acceleration time (P4.2). (Load inertia or initial fric-
tion may lengthen acceleration times).
1 = Flying start:
The frequency converter is also able to start running a motor by applying a
small torque to it and searching for the frequency that matches the speed the
motor is running at. Searching starts at maximum frequency and works down-
wards until the correct frequency is detected. Therefore, output frequency will
be increased/decreased to the set reference value according to the set accel-
eration/deceleration parameters. Use this mode if the motor is rotating when
the start command is given. A flying start makes it possible to ride through
short interruptions in mains voltage
3.3 S
TOP
M
ODE
Two stop modes can be selected in this application.
0 = Coasting:
The motor coasts to a halt without control from the frequency converter after
the Stop command.
1 = Ramp stop:
After the Stop command, the speed of the motor is decelerated according to
the set deceleration parameters.
If regenerated energy is high, it may be necessary to use an external braking
resistor to decelerate the motor in acceptable time.
3.5 M
OTOR
C
ONTROL
With this parameter the user can select the motor control mode. The options
are:
0 = Frequency Control:
I/O terminal references are frequency references and the frequency converter
controls output frequency (output frequency resolution = 0.01 Hz)
1 = Speed Control:
I/O terminal references are speed references and the frequency converter
controls motor speed.
