Danfoss VLT AutomationDrive FC 300 Operating Instructions Manual page 77

How to Programme the Low Ha...
2-26 Torque Ref
Range:
0.00 % [0 - 0 %] The value defines the torque applied against
*
2-27 Torque Ramp Time
Range:
0.2 s [0.0 - 5.0 s] The value defines the duration of the torque
*
6 6
Motor
Speed
Torque
ref.
Relay
Gain
Boost
Mech.
Brake
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:
0.00 [-100.00 -
% 100.00 %]
*
76
VLT Automation Low Harmonic Drive Operating Instructions
Function:
the closed mechanical brake, before release
Function:
ramp in clockwise direction.
II
I
Brake
Premag Torque Ramp
Release
Time
Time
p. 2-27
p. 2-25
Torque Ref. 2-26
Gain Boost Factor
p. 2-28
1 2 3
Function:
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
(3-03 Maximum Reference) If a Ref
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 and Ref
MAX
Afterwards, the value is added to Ref
When using preset references, select Preset
ref. bit 0/1/2 [16], [17] or [18] for the
MG34O202 - VLT
2-28 Gain Boost Factor
Range:
1.00 N/A [1.00 - 4.00
*
N/A]
Ramp 1 up
p. 3-41
3-10 Preset Reference
Array [8]
Range: 0-7
Range:
MAX
MIN
.
MIN
.
MIN
®
is a registered Danfoss trademark
Function:
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.
Ramp 1 down Stop Activate
p. 3-42 Delay Brake
p. 2-24 Delay
p. 2-23
Function:
corresponding digital inputs in parameter
group 5-1*.