How can you view the contents of PLC data files in the programming software?

• A. Double click on the data file name in the project tree
• B. Open the data file from the data editor
• C. Use the PLC diagnostic tool
• D. Data files are not viewable

Answer: (A)

To view what's stored in PLC data files, locate the data file in the project tree and double-click its name. This opens the data file in the data editor/viewer, showing each element’s address, type, and current values so you can inspect (and edit if allowed) what’s stored there. The project tree is the navigation hub; double-clicking starts the viewing session immediately. Using the data editor to open a file requires that you’ve already started the editor in some way, which isn’t as direct as just double-clicking the file name in the project tree. The diagnostic tool is for hardware/software health checks, not for browsing data file contents, and saying data files aren’t viewable isn’t accurate because the editor/viewer built into the software is designed for that purpose.