Define variables and plot curve points

You can define variables in the Curve Editor to provide x-axis and y-axis information required for a performance curve. A Curve is tabular data with interpolations between the x and y points that you define.

Define variables

1. Open an existing Curve or create a new one.

2. Expand the Variables section.

3. Change the name of the default independent variable (Var1), and select its Type. By default, AVEVA Process Simulation automatically adds the independent variable when you create a new Curve.

   The Units column displays the internal unit of measure (UOM) for the Type that you define. AVEVA Process Simulation converts all values of the specified Type to this UOM when it performs calculations. You cannot change this UOM.

4. Enter a Description for the independent variable.

5. Change the name of the default dependent variable (Var2), and select its Type. By default, AVEVA Process Simulation automatically adds this dependent variable when you create a new Curve.

6. To add another dependent variable, select Add Dependent Variable . Change the name of the new dependent variable, and select its Type.

   The Units column displays the internal UOM for the Type that you define. AVEVA Process Simulation converts all values of the specified Type to this UOM when it performs calculations. You cannot change this UOM.

7. Select the Interpolation type for each dependent variable.

8. Enter a Description for each dependent variable.

Plot curve points

9. Open an existing Curve or create a new one.

10. Expand the Curves section.

11. In the Curve list, select the dependent variable for which you want to enter curve data.

12. In the data table, in the UOM list for each variable, select the UOM for the data point that you want to enter.

    The UOM list contains UOMs that are specific to the Type that you defined for the variable. A UOM list does not appear for dimensionless variables.

13. To add more data points to the curve, select Add Curve Point .

14. Enter curve data for the independent and dependent variables.

    The curve data appears on the curve chart.