FC 300 Design Guide
How to Program
Start Speed (RPM) and par. 1-76 Start Current
in the start delay ti me.
Regardless of the value applied by the reference
signal, the output s pee d applies the setting of the
start speed in par. 1-74 or par. 1-75 and the output
current corresponds to the s etting of the start
current in par. 1-76 Start Curre nt. This function
is typically used in hoisting ap pli cations without
counterweight and especially in applications with a
cone motor, where the start is clockwise, followed by
rotation in the reference d irecti on. Sele ct Horizontal
operation [4] to obtain the function described in
par. 1-74andpar. 1-76duringthestartdelaytime.
The m otor 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). T h e output current corresponds to the
setting of the start current in pa r. 1-76 Start current.
Select VVC+/Flux clockwise [5] for the function
described in par. 1-74 only (Start spe ed in the
start delay time). T h e start current is calculated
automatically. This function uses the start speed
in the sta rt 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 referen
ce
direction [4 ] is particularly used in applicati ons with
counterweight and horizontal movement.
1-73 Flying Start [RPM]
Option:
*
Off (DISABLED) [0]
On (ENABLED) [1]
Function:
This function makes it possible to catch a motor
which is spinning freely due to a mains drop-out.
Select Disable [0] if this function is not required.
Select Enable [1] to enable th
e 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.
NOTE
This function is not recommended for
hoisting app lications.
1-74 Start Speed [RPM]
Range:
0-600RPM
*
0RPM
Function:
Set the motor start speed. After the start signal,
the motor output spee d le aps to the set value.
This parameter can be used for hoist applica tions
(cone rotor motors). Set the s tart 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:
0-500Hz
*
0Hz
Function:
Set the motor start speed. After the start signal
the motor output spee d le aps to the set value.
This parameter can be used for hoist applica tions
(cone rotor motors). Set the s tart 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:
0.00 - par. 1-24 A
*
0.00 A
Function:
Some motors, such as cone rotor motors, need
extra current/starting speed (boost) to disengage
the mechanical brake. Adjust par. 1-74 Start Sp eed
[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. 1-7 1 Start
Delay. A reference signal must be present.
" 1-8* Stop Adjustments
Parameters for setting special stop fea-
tures for the m otor.
1-80 Function at Stop
Option:
*
Coast [0]
DC hold [1]
*
default setting ()display text []value for use in communication via serial communication port
168
MG.33.B
6.22 - V LT is a registered Danfoss trademark
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