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- Yokogawa
- F3SP28-3S
- CPU Module
- Japan
- 28.9 x 100 x 83.2 mm
- 0.125 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Yokogawa F3SP28-3S is a high-performance Sequence CPU Module developed for the FA-M3 PLC platform. It serves as the central controller of the automation system, executing ladder logic programs, processing digital and analog I/O data, managing communication between modules, and providing deterministic real-time control.
Designed for medium to large industrial automation systems, the F3SP28-3S combines high-speed instruction execution, large program capacity, and advanced diagnostic capabilities to deliver reliable performance in demanding manufacturing environments.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Yokogawa |
| Model | F3SP28-3S |
| Product Type | Sequence CPU Module |
| PLC Platform | FA-M3 Series |
| Control Method | Stored Program Cyclic Execution |
| Programming Language | Ladder Diagram (LD), Mnemonic Language |
| Program Capacity | 30K Steps |
| Basic Instruction Execution Speed | 0.045–0.18 μs per instruction |
| Application Instruction Speed | 0.18 μs minimum |
| Maximum I/O Capacity | Up to 4,096 I/O Points |
| Internal Relay Capacity | 16,384 Points |
| Data Register Capacity | 16,384 Registers |
| File Register Capacity | 32,768 Registers |
| Diagnostic Functions | CPU, Memory, I/O, and Program Self-Diagnostics |
| Power Supply | 5 V DC (via FA-M3 Base Unit) |
| Dimensions | 28.9 × 100 × 83.2 mm |
| Weight | 0.125 kg |
Function and Working Principle
The F3SP28-3S operates as the processing core of the FA-M3 PLC system by repeatedly executing the PLC scan cycle. It reads field input signals, processes the stored ladder program, updates internal memory, and refreshes output signals to control connected equipment.
This continuous cyclic operation ensures fast response, precise control, and stable operation in industrial automation applications.
Operating Sequence
- Read input signals from I/O modules.
- Execute the stored ladder program.
- Process logic, timers, counters, and arithmetic instructions.
- Update internal registers and memory.
- Refresh output modules.
- Repeat the scan cycle continuously.
Input→CPU Execution→Logic Processing→OutputInput\rightarrow CPU\;Execution\rightarrow Logic\;Processing\rightarrow Output
Key Features
- High-speed sequence processing
- 30K-step program capacity
- Supports up to 4,096 I/O points
- Fast cyclic scan execution
- Built-in self-diagnostic functions
- Supports online programming and debugging
- Stable real-time control performance
- Flexible expansion with FA-M3 modules
System Role
The F3SP28-3S functions as the main controller of the FA-M3 automation system, coordinating data exchange between all connected modules and executing user-defined control programs.
Typical Control Architecture
Sensors → Input Modules → F3SP28-3S CPU → Output Modules → Motors, Valves, Actuators
The CPU ensures synchronized system operation while maintaining deterministic control performance.
Industrial Applications
The F3SP28-3S is suitable for various industrial automation applications, including:
- Manufacturing automation
- Packaging machinery
- Automotive assembly lines
- Semiconductor production equipment
- Material handling systems
- Robotics and motion control
- Food and beverage processing
- Pharmaceutical manufacturing
- Water treatment systems
- General factory automation
Installation Guidelines
- Install the module in a compatible FA-M3 base unit.
- Disconnect system power before installation or replacement.
- Verify compatibility with the power supply and expansion modules.
- Ensure the CPU module is securely seated in the backplane connector.
- Maintain adequate ventilation inside the control cabinet.
- Apply proper grounding to minimize electrical interference.
- Perform system diagnostics after installation before commissioning.
Compatible Components
The F3SP28-3S 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
| Model | Description |
|---|---|
| F3SP05-0P | Standard Serial CPU Module |
| F3SP22-0S | Entry-Level Sequence CPU Module |
| F3SP38-6S | High-Performance CPU Module |
| F3SP53-4S | Advanced Sequence CPU Module |
| F3SP58-6S | High-Capacity CPU Module |
Advantages
- High-speed instruction execution
- Large program and data capacity
- Reliable real-time processing
- Excellent expansion capability
- Comprehensive self-diagnostics
- Easy system maintenance
- Compact and lightweight design
- Suitable for continuous industrial operation
Frequently Asked Questions
What is the primary function of the F3SP28-3S?
It serves as the main CPU of the FA-M3 PLC system, executing control programs and coordinating all automation operations.
What is the program capacity of this CPU?
The F3SP28-3S supports 30K steps of ladder program storage.
How many I/O points can it support?
The module supports up to 4,096 I/O points within an FA-M3 automation system.
Does it support online programming and diagnostics?
Yes. The CPU supports online programming, monitoring, debugging, and system diagnostics.
What industries commonly use this CPU module?
It is widely used in manufacturing, packaging, automotive, semiconductor, robotics, process control, and other industrial automation applications.
Conclusion
The Yokogawa F3SP28-3S CPU Module is a powerful and reliable controller for the FA-M3 PLC platform. With its 30K-step program capacity, high-speed instruction execution, support for up to 4,096 I/O points, and comprehensive diagnostic capabilities, it provides outstanding performance for medium to large-scale industrial automation systems.