To configure a Mitsubishi PLC, you need to set up both the hardware and software properly before programming. Start by opening the programming software — GX Works2 or GX Works3, depending on your PLC series. Create a new project and select the correct PLC model, such as FX5U or Q-series. Then, in the project tree, configure the hardware setup by adding the CPU module, power supply, and I/O modules in the same order as they are physically mounted. Each I/O module needs to be assigned a specific starting address for inputs (X) and outputs (Y), such as X0 or Y10. This ensures the program correctly identifies each input and output point. You can read the connected modules automatically if the PLC is linked to your PC, which helps verify that all devices are detected correctly.
Next, configure the communication and network settings. For Ethernet-based PLCs, assign a proper IP address (for example, 192.168.3.250 for FX5U) and confirm the network type, unit number, and station number. Once all parameters are set, write or download the configuration to the PLC through a USB or Ethernet cable. Always perform a connection test to ensure successful communication between the PLC and the programming software. After that, you can compile and write your ladder logic or structured program into the CPU. Finally, switch the PLC to RUN mode and test the system using simulation or live monitoring to verify inputs, outputs, and logic. In short, configuring a Mitsubishi PLC involves project creation, hardware setup, I/O addressing, network configuration, and final program download — all done step-by-step using GX Works software for smooth operation in automation projects.