Table Of Contents

Viewing Bit Layouts

Last Modified: July 20, 2020

A bit layout indicates the byte order of signals. The NI-XNET Database Editor displays bit layouts for relevant signals on the Signal, Frame, and PDU Properties pages.

The Byte Order property defines how signal bytes are ordered in the frame payload when the frame is loaded in memory. The NI-XNET Database Editor shows bit-level layouts of signals within a container so that you can determine more easily how signals are organized in their container and how they are multiplexed.

In the bit layout, individual signals are depicted as groups of one or more contiguous, like-colored boxes. The bit layout makes use of five colors to differentiate signals within the same container. Each colored box represents a bit, and each row in the bit layout is a byte of data.

Within a signal, numbered boxes indicate the order of bits. When you select a bit (one of the numbered boxes), all the bits in the group change to green, indicating the active signal.

  1. In the left pane, select the appropriate PDU, frame, or signal name. The editor displays the properties page in the content pane at the right. The Bit Layout panel is at the bottom of the page.
  2. In the bit layout, click a numbered box in a group of one or more bits, indicated by color, to select a particular signal. The following signal properties are displayed in the area at the right of the bit layout.
    • Name—Signal name. Click the signal name to load Signal Properties in the content pane.
    • Item Type—Signal, or type of item represented in the bit layout.
    • Multiplexor Type—Type property: Static, Multiplexer, or Multiplexed
    • Byte Order—Order of bytes in the frame payload: Little Endian or Big Endian.

Recently Viewed Topics