Danfoss VLT AutomationDrive FC 300 Programming Manual page 59

3 Parameter descriptions
1-76 Start Current
Range:
0.00 A* [Application dependant]
3
3.3.8 1-8* Stop Adjustments
Parameters for setting special stop features for the motor.
1-80 Function at Stop
Option:
[0] * Coast
[1] DC hold
[2] Motor check
[3] Pre-magnetizing
[4] DC Voltage U0
[5] Coast at low reference
1-81 Min Speed for Function at Stop [RPM]
Range:
Application [0 - 600 RPM]
dependent*
1-82 Min Speed for Function at Stop [Hz]
Range:
Application [Application dependant]
dependent*
1-83 Precise Stop Function
Option:
[0] * Precise ramp stop
[1] Cnt stop with reset
[2] Cnt stop w/o reset
[3] Speed comp stop
58
Function:
Some motors, e.g. cone rotor motors, need extra current/starting speed to disengage the rotor. To
obtain this boost, set the required current in par. 1-76
[RPM] Start Function
. Set par. 1-72
Delay
.
This parameter can be used for hoist applications (cone rotor).
Function:
Select the frequency converter function after a stop command or after the speed is ramped down
to the settings in par. 1-81 Min Speed for Function at Stop [RPM]
Leaves motor in free mode. The motor is disconnected from the frequency converter.
Energizes motor with a DC holding current (see par. 2-00
Checks if a motor has been connected.
Builds up a magnetic field while the motor is stopped. The motor can now produce a quick torque
build-up at start. Asynchronous motors only.
Function:
Set the speed at which to activate par. 1-80
Function:
Set the output frequency at which to activate par. 1-80
Function:
Achieves high repetitive precision at the stopping point.
Runs the frequency converter from receipt of a pulse start signal until the number of pulses pro-
grammed by the user in par. 1-84 Precise Stop Counter Value
29 or input terminal 33.
An internal stop signal will activate the normal ramp down time (par. 3-42
Time Ramp 2 Ramp down Time
, par. 3-52
4 Ramp Down Time
). The counter function is activated (starts timing) at the edge of the start signal
(when it changes from stop to start). After each precise stop the number of pulses counted during
ramp down 0 rpm is reset.
Same as [1] but the number of pulses counted during ramp down to 0 rpm is deducted from the
Precise Stop Counter Value
counter value in par. 1-84
Stops at precisely the same point, regardless of the present speed, the stop signal is delayed in-
ternally when the present speed is lower than the maximum speed (set in par. 4-19
Frequency ).
®
MG.33.M8.02 - VLT is a registered Danfoss trademark
FC 300 Programming Guide
Start Current
. Set par. 1-74
to [3] or [4], and set a start delay time in par. 1-71
.
DC Hold Current
Function at Stop
.
Function at Stop
.
has been received at input terminal
Ramp 3 Ramp down Time
, par. 3-62
.
Start Speed
Start
).
Ramp 1 Ramp Down
Ramp
or par. 3-72
Max Output