Danfoss VLT AutomationDrive FC 300 User Manual

2-26 Torque Ref
Range: Function:
0.00 %* [0 - 0 %] The value defines the torque applied against
the closed mechanical brake, before release
2-27 Torque Ramp Time
Range: Function:
0.2 s* [0.0 - 5.0 s] The value defines the duration of the torque
ramp in clockwise direction.
2-28 Gain Boost Factor
Range: Function:
1.00 N/A* [1.00 - 4.00
N/A]
Only active in flux closed loop. The
function ensures a smooth transition
from torque control mode to speed
control mode when the motor takes
over the load from the brake.
Mech.
Brake
Gain
Boost
Relay
Torque
ref.
Motor
Speed
Premag Torque Ramp
Time
p. 2-27
Torque Ref. 2-26
Gain Boost Factor
p. 2-28
Brake
Release
Time
p. 2-25
Ramp 1 up
p. 3-41
Ramp 1 down
p. 3-42
Stop
Delay
p. 2-24
Activate
Brake
Delay
p. 2-23
1 2 3
130BA642.12
II
I
Illustration 6.9 Brake release sequence for hoist mechanical brake control
I) Activate brake delay: The frequency converter starts again from the mechanical brake engaged position.
II) Stop delay: When the time between successive starts is shorter than the setting in 2-24 Stop Delay, the frequency converter starts
without applying the mechanical brake (e.g. reversing).
3-10 Preset Reference
Array [8]
Range: 0-7
Range: Function:
0.00
%*
[-100.00 -
100.00 %]
Enter up to eight different preset references
(0-7) in this parameter, using array
programming. The preset reference is stated
as a percentage of the value Ref
MAX
(3-03 Maximum Reference) If a Ref
MIN
different from 0 (3-02 Minimum Reference) is
programmed, the preset reference is
calculated as a percentage of the full
reference range, i.e. on the basis of the
difference between Ref
MAX
and Ref
MIN
.
Afterwards, the value is added to Ref
MIN
.
When using preset references, select Preset
ref. bit 0/1/2 [16], [17] or [18] for the
3-10 Preset Reference
Array [8]
Range: 0-7
Range: Function:
corresponding digital inputs in parameter
group 5-1*.
How to Programme the Low Ha... VLT Automation Low Harmonic Drive Operating Instructions
76 MG34O202 - VLT
®
is a registered Danfoss trademark
6
6

Danfoss VLT AutomationDrive FC 300 Specifications

General

Brand	Danfoss
Model	VLT AutomationDrive FC 300
Category	DC Drives
Language	English