Danfoss FC 300 Design Manual page 141

FC 300 Design Guide
par. 1-74 Start speed (RPM) is ignored and the
output speed equals zero (0). The output current
corresponds to the setting of the start current in
par. 1-76 Start current.
Select VVC+/Flux clockwise [5] for the function
described in par. 1-74 only (Start speed in the
start delay time). The start current is calculated
automatically. This function uses the start speed
in the start delay time only. Regardless of the val-
ue set by the reference signal, the output speed
equals the setting of the start speed in par.
1-74.Start speed/current clockwise
VVCplus/Flux clockwise [5] are typically used in
hoisting applications. Start speed/current in ref-
erence direction [4] is particularly used in appli-
cations with counterweight and horizontal move-
ment.
1-73 Flying Start [RPM]
Value:
Off
(DISABLE)
On
(ENABLE)
Function:
This function makes it possible to catch a motor
which is spinning freely due to a mains drop-out.
Description of choice:
Select Disable [0] if this function is not required.
Select Enable [1] to enable the frequency con-
verter to "catch" and control a spinning motor.
When par. 1-73 is enabled par. 1-71 Start Delay
and 1-72 Start Function have no function.
This parameter cannot be adjusted while motor is
running.
NB!
This function is not recommended for
hoisting applications.
1-74 Start Speed [RPM]
Value:
0 - 600 RPM
Function:
Set the motor start speed. After the start signal
the motor output speed leaps to the set value.
This parameter can be used for hoist applications
factory setting
How to Programme
[3] and
[0]
[1]
0RPM
() display text []
MG.33.B7.02 - VLT is a registered Danfoss trademark
(cone rotor motors). Set the start function in par.
1-72 Start Function to [3], [4] or [5], and set a
start delay time in par. 1-71 Start Delay. A refer-
ence signal must be present.
1-75 Start Speed [Hz]
Value:
0 - 500 Hz
Function:
Set the motor start speed. After the start signal
the motor output speed leaps to the set value.
This parameter can be used for hoist applications
(cone rotor motors). Set the start function in par.
1-72 Start Function to [3], [4] or [5], and set a
start delay time in par. 1-71 Start Delay. A refer-
ence signal must be present.
1-76 Start Current
Value:
0.00 - par. 1-24
Function:
Some motors, such as cone rotor motors, need
extra current/starting speed (boost) to disengage
the mechanical brake. Adjust par. 1-74 Start
Speed [RPM] and par. 1-76 to get this boost. Set
the required current value to disengage the me-
chanical brake. Set par. 1-72 Start Function to [3]
or [4], and set a start delay time in par. 1-71 Start
Delay. A reference signal must be present.
1-8* Stop Adjustments
Parameters for setting special stop features for
the motor.
1-80 Function at Stop
Value:
Coast
DC hold
Motor check
Pre-magnetizing
DC Voltage U0
Function:
Select the drive function after a stop command or
after the speed is ramped down to the settings in
par. 1-81 Min Speed for Function at Stop [RPM].
value for use in communication via serial communication port
0Hz
0.00A
[0]
[1]
[2]
[3]
[4]
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