MELSEC iQ F Series FBD Tutorial

The MELSEC iQ F series is Mitsubishi Electric’s compact PLC solution, ideal for small to medium-sized automation systems with LADDER and FBD language. Designed for simplicity and efficiency, the iQ-F series combines powerful features with a user-friendly interface, making it a versatile choice for various industries. This tutorial introduces the MELSEC iQ-F series and guides you through its configuration, programming, and usage.

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Why Choose MELSEC iQ-F Series?

Key Features:

1. Compact Design: Saves space while providing robust control capabilities.
2. Built-in Functions: Includes high-speed processing, communication protocols, and I/O control.
3. Ease of Integration: Supports Ethernet, RS-485, and CC-Link for seamless connectivity.
4. Cost-Effective: Combines affordability with high performance.

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Getting Started with MELSEC iQ-F Series

1: Hardware Setup

1. Unboxing and Inspection: Ensure all components, including the CPU module, power supply, and optional I/O modules, are intact.
2. Mounting: Securely mount the PLC on a DIN rail or panel using the provided fixtures.
3. Wiring:
   • Connect the power supply to the CPU module.
   • Wire inputs (e.g., sensors) and outputs (e.g., relays or actuators) to their respective terminals.
   • Follow the wiring diagram in the manual to ensure proper connections.

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2: Installing MELSOFT GX Works3

The MELSEC iQ-F series is programmed using MELSOFT GX Works3.

1. Install GX Works3 on your PC following the instructions provided.
2. Connect your PLC to the PC using a USB or Ethernet cable.
3. Verify the connection by launching GX Works3 and selecting Diagnostics from the Tools menu.

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Programming the MELSEC iQ F Series with FBD

1: Creating a New Project

1. Open GX Works3 and click New Project.
2. Select the iQ-F series and specify the PLC model.
3. Name your project and choose a save location.

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2: Configuring Modules

1. Open the Module Configuration panel.
2. Drag and drop the CPU module and any additional I/O or communication modules from the library.
3. Set module parameters, such as device addresses and communication settings.

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3: Writing a MELSEC iQ F series FBDLogic Program

1. In the Program Editor, select FBD.
2. Add rungs to define input/output relationships, logic gates, and timers:
   • Inputs: Assign sensor signals to input addresses.
   • Outputs: Control devices like motors or alarms.
   • Timers/Counters: Implement delay or repeat actions as required.
3. Use Device Labels to assign descriptive names to devices for easier debugging.
4. Compile the program to check for errors.

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Debugging and Monitoring

1: Offline Simulation

1. Use GX Works3’s Simulator to test your program without a physical PLC.
2. Verify program logic and adjust as needed.

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2: Online Monitoring

1. Connect to the PLC and upload your program.
2. Monitor real-time device statuses and variable values using the Monitor tool.
3. Adjust parameters or force I/O points for troubleshooting.

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Advanced Features of MELSEC iQ-F

• Built-in Ethernet: Simplifies networked communication with other devices.
• Positioning Control: Built-in pulse outputs for stepper motors or servos.
• Data Logging: Record and analyze operational data for process optimization.

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Conclusion