Product Overview

The Yokogawa F3SP28-3N is a high-speed Sequence CPU Module designed for the FA-M3 PLC platform. As the central controller of the automation system, it executes ladder logic programs, processes I/O data, manages communication between modules, and performs real-time control of industrial equipment.

Engineered for demanding automation applications, the F3SP28-3N features ultra-fast instruction execution, high program capacity, and deterministic scan performance, making it ideal for high-speed manufacturing, motion control, and process automation.

Technical Specifications

Function and Working Principle

The F3SP28-3N continuously executes the PLC scan cycle by reading input signals, processing the user program, updating internal memory, and refreshing output signals.

Its high-speed processor significantly reduces scan time, enabling rapid response for complex control tasks and high-speed production equipment.

Operating Sequence

1. Read input data from I/O modules.
2. Execute ladder logic instructions.
3. Process timers, counters, arithmetic, and logical operations.
4. Update internal memory and registers.
5. Refresh output modules.
6. Repeat the scan cycle continuously.

$Input\to HighSpeedCPU\to LadderExecution\to Output$

Key Features

• Ultra-fast 0.045 μs basic instruction execution
• High-capacity 30K-step program memory
• Supports up to 4,096 I/O points
• High-speed cyclic scan operation
• Built-in system diagnostics and error monitoring
• Stable real-time control performance
• Supports online programming and maintenance
• Modular architecture for flexible system expansion

System Role

The F3SP28-3N serves as the processing center of the FA-M3 automation system, coordinating data exchange and executing control logic across all connected modules.

Typical System Architecture

Sensors → Input Modules → F3SP28-3N CPU → Output Modules → Motors, Valves, Actuators

The CPU ensures synchronized operation of the entire PLC system while maintaining deterministic control performance.

Industrial Applications

The F3SP28-3N is widely used in industrial automation applications, including:

• High-speed manufacturing lines
• Packaging machinery
• Semiconductor production equipment
• Automotive assembly systems
• Conveyor and material handling systems
• Robotics and motion control
• Food and beverage processing
• Pharmaceutical manufacturing
• Electronics assembly
• General factory automation

Installation Guidelines

• Install the CPU module in a compatible FA-M3 base unit.
• Ensure power is disconnected before installation or replacement.
• Verify compatibility with power supply and expansion modules.
• Secure the module firmly into the backplane connector.
• Maintain proper cabinet ventilation.
• Use correct grounding practices to minimize electrical noise.
• Perform system diagnostics after installation before commissioning.

Compatible Components

The F3SP28-3N is compatible with:

• FA-M3 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
• Positioning Modules
• Motion Control Modules
• Remote I/O Modules

Alternative Models

Advantages

• Ultra-fast instruction execution
• Large 30K-step program capacity
• Excellent real-time control performance
• Supports complex automation applications
• High system reliability
• Flexible modular expansion
• Comprehensive self-diagnostic capabilities
• Compact design with low power consumption

Frequently Asked Questions

What is the primary function of the F3SP28-3N?

It functions as the main CPU of the FA-M3 PLC system, executing ladder logic programs and coordinating all automation processes.

What is the instruction execution speed?

The module executes basic instructions in 0.045 μs, making it suitable for high-speed industrial control.

How many I/O points can it support?

The F3SP28-3N supports up to 4,096 I/O points in an FA-M3 automation system.

Does it support online programming?

Yes. The module supports online program download, monitoring, diagnostics, and maintenance.

Which industries commonly use this CPU module?

It is commonly used in manufacturing, semiconductor production, packaging, robotics, automotive assembly, process control, and other high-speed industrial automation applications.

Conclusion

The Yokogawa F3SP28-3N CPU Module is a high-performance controller designed for the FA-M3 PLC platform. Featuring 30K-step program capacity, ultra-fast 0.045 μs instruction execution, and support for up to 4,096 I/O points, it delivers exceptional speed, reliability, and scalability for demanding industrial automation systems.