Danfoss MCO 305 Design Manual page 75

MCO 305 Design Guide
Index cards Curve Data, Curve Info, and Parameter
Before you edit a curve, you should always first load the parameters of your control into the CAM-Editor.
You can save the parameters including the arrays into a CNF-file with MCT 10.
If you do not load any parameters, you will find that the FC 300 default settings have been entered.
If you change the parameters in the course of creating the curve, they will also be saved in the CNF file and
can be loaded into the control with MCT 10 or in Stand-alone Mode with Parameter
Index Card Curve Data
You can determine important key data of your
curve in the index card
If you edit several curves, you can give meaningful
names to the curves for your own information in
Name of Curve.
Type of Curve
In order to prevent velocity leaps in the case of
repeated curve cycles, you can choose between
three curve types. In each case, the interpolation
takes account of the gradient of the curve at the
beginning and end.
Select the curve type:
– The gradient of the curve at the beginning and end is averaged.
– The gradient at the beginning of the curve is also used for the end of the curve.
– The gradient at both the beginning and end are set to 0.
Setting the Master Length and Number of Intervals
The master length and number of intervals can be set in three ways:
1. Changing the last fixpoint by double clicking on it in the Fix Points table.
2. Moving the last Fix point using the mouse in the curve profile diagram.
3. Pressing the "Set" button in the Curve Data index card.
Both of the first two methods change the master cycle length directly. When changed in this way, the
number of interpolation points is changed automatically so that the interpolation interval (the distance
between interpolation points) remains unchanged. The last Fix points is always snapped to the interpolation
grid in order to avoid a fractional number of interpolation points.
If the "Set" button in the Curve Data index card is pressed, then a dialog is displayed that allows both the
master cycle length and the number of interpolation intervals to be changed simultaneously. If the change is
made this way, then the length of the interpolation interval is recalculated.
Note that this may result in some Fix points ending up off-grid, so it is recommended that the Snap on Grid
toolbar button also be pressed.
Note that the user is prevented from shortening the master cycle length beyond certain limits. The last
fixpoint cannot be moved to a position prior to
– the previous fixpoint,
– any Start Stop point,
– either of the correction start or end points,
– or the master marker position.
If it is necessary to move the last fixpoint beyond these limits, then it is necessary to first change the
limiting points/positions and then to move the last fixpoint.
__ PC Software Interface __
Curve Data:
®
MG.33.L4.02 – VLT is a registered Danfoss trademark
Restore from file.
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