National Instruments BridgeVIEW

Chapter 12 Case and Sequence Structures and the Formula Node

Frame 0 in the previous illustration contains a small box with an arrow

in it. That box is a sequence local variable which passes data between

frames of a Sequence structure. You can create sequence locals on the

border of a frame. Then, the data wired to a frame sequence local is

available in subsequent frames. However, you cannot access the data

in frames preceding the frame in which you created the sequence local.

13. Create the sequence local by popping up on the bottom border of

Frame 0 and choosing Add Sequence Local.

The sequence local appears as an empty square. The arrow inside

the square appears automatically when you wire a function to the

sequence local.

14. Finish the block diagram as shown in the opening illustration of the

Block Diagram section in this activity.

Tick Count (ms) function (Functions»Time & Dialog)—Returns the

number of milliseconds that have elapsed since power on. For this

activity, you need two Tick Count functions.

Random Number (0–1) function (Functions»Numeric)— Returns a

random number between 0 and 1.

Multiply function (Functions»Numeric)—In this activity, the

function multiplies the random number by 100.

Numeric Constant function (Functions»Numeric)—In this activity,

the numeric constant represents the maximum number that can be

multiplied.