Danfoss FC 300

The output current corresponds to the setting of the start cur-
rent in par. 1-76
Start current .
[5]
VVC
plus
/ Flux clock-
wise
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 clockwise
[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 spin-
ning freely due to a mains drop-out.
[0]
*
Off No function
[1] On Enables the frequency converter to “catch” and control a spin-
ning 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 out-
put 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 out-
put 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.
2. How to Programme FC 300 Programming Guide
56 MG.33.M2.02 - VLT
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is a registered Danfoss trademark
2