Danfoss FC 300

This parameter cannot be adjusted while motor is running.
1-69 Maximum Inertia
Range: Function:
0.0048
*
[0 - 0.4800] Enter the maximum moment of inertia of the mechanical sys-
tem. Par. 1-68
Minimum Inertia and par. 1-69 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 mo-
tor is running.
2.4.7. 1-7* Start Adjustments
Parameters for setting special motor start features.
1-71 Start Delay
Range: Function:
0.0s
*
[0.0 - 10.0 s] This parameter refers to the start function selected in par. 1-72
Start Function .
Enter the time delay required before commencing acceleration.
1-72 Start Function
Option: Function:
Select the start function during start delay. This parameter is
linked to par. 1-71
Start Delay .
[0] DC hold/ delay time Energizes motor with a DC holding current (par. 2-00) during
the start delay time.
[1] DC Brake/delay time Energizes motor with a DC braking current (par. 2-01) during
the start delay time.
[2]
*
Coast/delay time Releases shaft coasted converter during the start delay time
(inverter off).
[3] Start speed/ current
clockwise operation
Only possible with VVC+.
Connect 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 output 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, 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).
FC 300 Programming Guide 2. How to Programme
MG.33.M2.02 - VLT
®
is a registered Danfoss trademark 55
2