Specify a Limit

Limits are specified as either continuous or segmented.

Assume that the signal to be monitored starts at x = x0 and all the data points are evenly spaced. The spacing between each point is denoted by dx.

A continuous limit is specified using a set of x and y points {{x1, x2, x3, …}, {y1, y2, y3, …}}. You create a limit with the first point at x0 and all other points at a uniform spacing of dx(x0 + dx, x0 + 2dx, …). This is done through a linear interpolation of the x and y values that define the limit. The following figure shows a continuous limit.

Figure 81. Continuous Limit Example

1378

In the previous figure, the dots represent the points at which the limit is defined and the solid line represents the limit you create. You can repeat the interpolation process if the spacing between the samples changes. The limit is undefined in the region x0 < x < x1 and for x > x4.

The following figure shows a segmented limit.

Figure 82. Segmented Limit Example

1378

The first segment is defined using a set of x and y points {{x1, x2}, {y1, y2}}. The second segment is defined using a set of points {x3, x4, x5} and {y3, y4, y5}. You can define any number of such segments. As with continuous limits, you use linear interpolation to create a limit with the first point at x0 and all other points with a uniform spacing of dx. The limit is undefined in the region x0 < x < x1 and in the region x > x5. Also, the limit is undefined in the region x2 < x < x3.