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92 Chapter 5  Basics of PLC Programming the different processors that the RSLogix software can program. You simply scroll down the list until you find the processor you are using and select it. • I/O Configuration—The I/O Configuration screen (Figure 5-49) lets you click or drag-and-drop a module from an all-inclusive list to assign it to a slot in your configuration. • Data Files—Data File screens contain data that are used in conjunction with ladder program instructions and include input and output files as well as timer, counter, integer, and bit files. Figure 5-50 shows an example of the bit file B3, which is used for internal relays. Note that all the addresses from this file start with B3. Relay ladder logic is a graphical programming language designed to closely represent the appearance of a wired relay system. It offers considerable advantages edit status, and whether forces are present and enabled. -- Project Window—This window displays the file folders listed in the project tree. -- Project Tree—The project tree is a visual representation of all folders and their associated files contained in the current project. From the project tree, you can open files, create files, modify file parameters, copy files, hide or unhide files, delete files, and rename files. -- Result Window—This window displays the results of either a search or a verify operation. The verify operation is used to check the ladder program for errors. -- Active Tab—This tab identifies which program is currently active. -- Status Bar—This bar contains information relevant to the current file. -- Split Bar—The split bar is used to split the ladder window to display two different program files or groups of ladder rungs. -- Tabbed Instruction Toolbar—This toolbar displays the instruction set as a group of tabbed categories. -- Instruction Palette—This tool contains all the available instructions displayed in one table to make the selection of instructions easier. -- Ladder Window—This window displays the currently open ladder program file and is used to develop and edit ladder programs. -- Ladder Window Properties—This window allows you to change the display of your ladder program and its associated addressing and documentation. • Select Processor Type—The programming software needs to know what processor is being used in conjunction with the user program. The Select Processor Type screen (Figure 5-48) contains a list of Figure 5-48  Select processor type screen. Source: Image Courtesy of Rockwell Automation, Inc. Figure 5-49  I/O configuration screen. Source: Image Courtesy of Rockwell Automation, Inc. Figure 5-50  Data bit file B3 screen. Source: Courtesy of TheLearningPit.


Petruzella_ProgrammableLogicControllers__5e
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