Current
. This function is typically used in hoisting applications without counterweight and especially in applica-
tions with a Cone-motor, where the start is clockwise, followed by rotation in the reference direction.
[4]
Horizontal operation
Only possible with VVC+.
For obtaining the function described in par. 1-74 and par. 1-76 during the start delay time. The motor rotates
in the reference direction. If the reference signal equals zero (0), 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
.
[5]
VVC
plus
/ Flux clockwise 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 value set by the
reference signal, the output speed equals the setting of the start speed in par. 1-74.
Start speed/current clock-
wise
[3] and
VVCplus/Flux clockwise
[5] are typically used in hoisting applications.
Start speed/current in
reference direction
[4] is particularly used in applications with counterweight and horizontal movement.
[6]
Hoist Mech. Brake Rel
For utilizing mechanical brake control functions, par. 2-24 to 2-28. This parameter is only active when par. 1-01
is set to [3]
Flux w/ motor feedback (FC 302 only)
.
1-73 Flying Start [RPM]
Option:
Function:
This function makes it possible to catch a motor which is spinning freely due to a mains drop-out.
[0]
*
Off
No function
[1]
On
Enables the frequency converter 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]
Range:
Function:
0 RPM
*
[0 - 600 RPM]
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 reference signal must be present.
1-75 Start Speed [Hz]
Range:
Function:
0 Hz
*
[0 - 500 Hz]
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 reference signal must be present.
1-76 Start Current
Range:
Function:
0.00 A
*
[0.00 - par. 1-24]
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 mechanical 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.
2.4.8. 1-8* Stop Adjustments
Parameters for setting special stop features for the motor.
FC 300 Programming Guide
2. How to Programme
MG.33.M3.02 - VLT
®
is a registered Danfoss trademark
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