Product Overview

The Yokogawa F3SP71-4S is a high-performance CPU Module designed for the FA-M3V PLC Series. As the central controller of the automation system, it executes user programs, processes I/O data, manages communication between PLC modules, and performs high-speed sequential control for complex industrial applications.

Equipped with built-in Ethernet, USB 2.0, an SD memory card slot, and a 60K-step ladder program capacity, the F3SP71-4S provides excellent processing performance, flexible networking, and efficient data management for modern factory automation systems.

Technical Specifications

Function and Working Principle

The F3SP71-4S continuously executes the PLC scan cycle by reading input signals, processing the user-defined control program, updating internal memory, and refreshing output signals.

Its high-speed processor, built-in Ethernet communication, and large memory resources enable efficient execution of complex automation tasks while supporting real-time networking and remote maintenance.

Operating Sequence

1. Acquire input data from local and remote I/O modules.
2. Execute the stored ladder logic program.
3. Process arithmetic, logic, timer, counter, and communication instructions.
4. Update internal memory and registers.
5. Refresh output modules.
6. Repeat the scan cycle continuously.

$Input\to CPUProcessing\to ProgramExecution\to Output$

Key Features

• High-speed CPU with 0.00375 μs instruction execution
• 60K-step ladder program capacity
• 120K-step project capacity
• Supports up to 4,096 I/O points
• Integrated Ethernet and USB 2.0 interfaces
• Built-in RAM disk for fast data access
• SD/SDHC memory card support
• Supports Modbus/TCP and FTP communication
• Online programming, monitoring, and debugging
• Advanced self-diagnostic and maintenance functions

System Role

The F3SP71-4S serves as the control center of the FA-M3V PLC system, coordinating all automation tasks and communication between connected modules.

Typical Control Architecture

Sensors → Input Modules → F3SP71-4S CPU → Output Modules → Motors, Valves, Actuators

The CPU ensures deterministic control, fast system response, and reliable operation across the entire automation network.

Industrial Applications

The F3SP71-4S is widely used in:

• Manufacturing automation
• Automotive production
• Semiconductor fabrication
• Packaging and labeling equipment
• Robotics and motion control
• Material handling systems
• Process automation
• Water and wastewater treatment
• Energy management
• Pharmaceutical and chemical processing

Installation Guidelines

• Install the CPU module in a compatible FA-M3V base unit.
• Disconnect power before installation or replacement.
• Ensure compatibility with connected I/O and communication modules.
• Secure the module firmly in the backplane connector.
• Connect Ethernet and USB interfaces as required.
• Install an SD memory card when additional storage or backup is needed.
• Ensure proper grounding and cabinet ventilation.
• Verify system status using diagnostic indicators before commissioning.

Compatible Components

The F3SP71-4S is compatible with:

• FA-M3V Base Units
• FA-M3 Power Supply Modules
• Digital Input Modules
• Digital Output Modules
• Analog Input Modules
• Analog Output Modules
• Ethernet Communication Modules
• Serial Communication Modules
• Motion Control Modules
• Positioning Modules
• Remote I/O Modules
• Special Function Modules

Alternative Models

Advantages

• Ultra-fast instruction processing
• Integrated Ethernet networking
• Built-in USB programming interface
• SD card support for program backup
• Large project memory capacity
• Comprehensive diagnostic functions
• Flexible expansion for complex systems
• Reliable long-term industrial performance

Frequently Asked Questions

What is the primary function of the F3SP71-4S?

It serves as the central CPU of the FA-M3V PLC system, executing control programs, processing I/O data, and coordinating communication between automation modules.

What is the program capacity of this CPU?

The module supports 60K steps of ladder program memory with a 120K-step project capacity.

Does the F3SP71-4S support network communication?

Yes. It includes built-in Ethernet and USB 2.0 interfaces and supports protocols such as TCP/IP, UDP/IP, FTP, and Modbus/TCP.

How many I/O points can it support?

The module supports up to 4,096 I/O points in an FA-M3V automation system.

What industries commonly use this CPU module?

It is widely used in manufacturing, semiconductor production, automotive assembly, packaging, robotics, process control, water treatment, and other industrial automation applications.

Conclusion

The Yokogawa F3SP71-4S CPU Module is a powerful controller for the FA-M3V PLC platform, combining 60K-step ladder program capacity, ultra-fast 0.00375 μs instruction execution, integrated Ethernet and USB communication, SD memory expansion, and advanced diagnostic capabilities. Its high-speed processing and networking features make it an excellent choice for modern industrial automation systems.