The Mitsubishi simulation software FX-TRN-BEG-C is a comprehensive tool designed for the FX series PLCs. It serves as an excellent learning platform for beginners to grasp and understand the command system of Mitsubishi PLCs. To get started, users are required to familiarize themselves with the command format and input methods of the PLC.
When you launch the software, a login window appears. While it’s optional to set up a username and password, it can help track your progress during learning. Most users can start directly from the beginning without any additional configuration.
Once inside, you’ll see the main training interface, which includes six learning stages labeled A through F. These stages gradually increase in complexity, starting from the basics and moving toward more advanced concepts. It's recommended that beginners follow the sequence from A to F step by step. Before diving into the exercises, take time to review the help files to understand how the software works.
The training screen is divided into several sections, including a 3D simulation view and an operation panel. The X and Y labels on the 3D model represent the input and output points of the PLC. For example, "Y1 (conveyor forward rotation)" indicates that when Y1 is activated, the conveyor belt moves forward. Similarly, X0 refers to a sensor connected to the PLC’s input point.
The index window provides guidance on the learning steps. It’s best to follow the prompts initially, but once you become more experienced, you can experiment with different programming approaches. For instance, if the index requires that pressing a button (X1) activates a machine’s rocker arm (Y0), you could use timers or other instructions to create an automatic sequence. However, always ensure that your program uses the correct input and output addresses as shown in the simulation.
To work with the ladder diagram, click the “Ladder Edit†button located at the top left of the screen. This activates the program input area, turning the blue bar dark blue. Here’s a comparison of the input area before and after activation:
[Image: Ladder input area before and after activation]
The menu options in the software are similar to those found in other programs, with some unique functions. One key feature is the "Conversion" menu, which allows you to compile the program. When you make changes to the ladder logic, the modified parts are highlighted in gray. Clicking "Conversion (F4)" or using the shortcut button will compile the program. If there are no errors, the background color changes to white.
Another important function is the "Online" menu, specifically the "Write to PLC" option. After compiling the program, this feature simulates writing the code to the PLC. Once completed, a dialog box appears indicating that the simulation has started. The "RUN" indicator on the right side of the screen lights up, signaling that the PLC is now active. You can then use the buttons on the operation panel to simulate real-world conditions.
Below the ladder diagram, there is a node shortcut menu that allows quick access to common commands such as normally open, normally closed, coil, application instructions, rising edge, and falling edge. Each node displays its name when hovered over, making it easy to identify.
For example, a normally open or closed node behaves similarly to electrical schematics. Consider a simple self-protection stop circuit where X000 is the start button (normally open), and X001 is the stop button (also normally open). If the stop button were normally closed, the ladder logic would not produce an output, as the normally closed node would be open. This highlights a key difference between PLC programming and traditional electrical diagrams.
Rising and falling edge instructions allow specific actions to occur only on the transition of a signal. For instance, an addition instruction might execute only on the rising edge of X000, improving efficiency by reducing unnecessary scans.
Coil commands are used to generate output signals, controlling both physical outputs (like Y0, Y1) and internal components such as timers (T0, T1) and counters (C0, C1). Timers and counters require careful setup, with values like K10 representing decimal numbers and timing units like 100ms for T0.
Application instructions include arithmetic and logical operations, such as add, subtract, AND, OR, and XOR. These are essential for more complex control systems.
Each learning stage comes with corresponding examples, typically found in the installation directory under "FXTRN/EXAMPLE." You can open these files via the "Project" menu and simulate their behavior in the PLC.
By following these steps and practicing regularly, users can gain confidence in using Mitsubishi PLCs and develop the skills needed for real-world applications.
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