Danfoss FC 300 Design Manual page 140

FC 300 Design Guide
adjusts to about 127%, depending on the motor
size.
This parameter is available for FC 302 only.
1-67 Load Type
Value:
Passive load
Active load
Function:
Select passive load [0] for conveyers, fan and
pump applications. Select active load [1] for hoist-
ing applications. When active load [1] is selected,
set par. 1-66 Min. Current at Low Speed to a level
which corresponds with maximum torque.
This parameter is available for FC 302 only.
1-68 Minimum Inertia
Value:
0.0001 - Par. 1-69
Function:
Enter the minimum moment of inertia of the me-
chanical SYSTEM. Par. 1-68 and par. 1-69 Maxi-
mum Inertia are used for pre-adjustment of the
Proportional Gain in the speed control, see par.
7-02 Speed PID Proportional Gain.
This parameter is available for FC 302 only.
This parameter cannot be adjusted while motor is
running.
1-69 Maximum Inertia
Value:
0 - 0.4800
Function:
Enter the maximum moment of inertia of the me-
chanical SYSTEM. Par. 1-68 Minimum Inertia and
par. 1-69 are used for pre-adjustment of the Pro-
portional Gain in the speed control, see par. 7-02
Speed PID Proportional Gain.
This parameter is available for FC 302 only.
This parameter cannot be adjusted while motor is
running.
1-7* Start Adjustments
Parameters for setting special motor start fea-
tures.
factory setting
140
How to Programme
[0]
[1]
0.0048
0.0048
() display text [] value for use in communication via serial communication port
MG.33.B7.02 - VLT is a registered Danfoss trademark
1-71 Start Delay
Value:
0.0 - 10.0 s
Function:
This parameter refers to the start function selec-
ted in par. 1-72 Start Function.
Enter the time delay required before commencing
acceleration.
1-72 Start Function
Value:
DC hold /delay time
DC Brake/delay time
Coast/delay time
Start speed/ current clockwise operation [3]
Horizontal operation
VVC plus /Flux clockwise
Function:
Select the start function during start delay . This
parameter is linked to par. 1-71 Start Delay.
Select DC hold /delay time [0] to energize the
motor with a DC holding current (par. 2-00) dur-
ing the start delay time.
Select DC brake /delay time [1] to energize the
motor with a DC braking current (par. 2-01) dur-
ing the start delay time.
Select Coast /delay time [2] to release the shaft
coasted converter during the start delay time (in-
verter off).
[3] and [4] are only possible with VVC+.
Select Start speed/current clockwise [3] to con-
nect the function described in par. 1-74 Start
Speed (RPM) and par. 1-76 Start Current in the
start delay time.
Regardless of the value applied by the reference
signal, the output speed applies the setting of the
start speed in par. 1-74 or par. 1-75 and the out-
put current corresponds to the setting of the start
current in par. 1-76 Start Current. This function is
typically used in hoisting applications without
counterweight and especially in applications with
a Cone-motor, where the start is clockwise, fol-
lowed by rotation in the reference direction. Select
Horizontal operation [4] to obtain the function de-
scribed in par. 1-74 and par. 1-76 during the start
delay time. The motor rotates in the reference di-
rection. If the reference signal equals zero (0),
0.0s
[0]
[1]
[2]
[4]
[5]