National Instruments BridgeVIEW 用户手册
Chapter 12
Case and Sequence Structures and the Formula Node
© National Instruments Corporation
12-9
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.
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.
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
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.
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.
random number between 0 and 1.
Multiply function (Functions»Numeric)—In this activity, the
function multiplies the random number by 100.
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.
the numeric constant represents the maximum number that can be
multiplied.