Description

YOKOGAWA F3SP21-0N

1. Basic Information

YOKOGAWA F3SP21-0N is a sequence control CPU module for YOKOGAWA FA-M3 series PLC systems. As the core main control unit, it is responsible for user program execution, I/O scheduling, logic operation and bus communication management. Featuring high-speed instruction processing, large program capacity and strong anti-interference performance, it is widely used in industrial automation equipment, utility engineering and small&medium process control scenarios.

The module supports structured programming and ladder logic programming, with online monitoring, online parameter modification and self-diagnosis functions. It adapts to 7×24-hour uninterrupted industrial operation, and is a standard spare part for new equipment assembly and faulty CPU replacement of legacy FA-M3 systems.

2. Technical Specifications

2.1 Core Performance & Operation Capacity

Model: F3SP21-0N, Type: FA-M3 Series Sequence Control CPU Module
Compatible System: YOKOGAWA FA-M3 Full-series PLC System
Instruction Speed: Basic instruction 0.18μs/step, application instruction 0.5μs~several μs/step
Program Capacity: Max 10K steps ladder logic program storage
Control Scale: Max 2048 I/O points expandable
Programming Mode: Structured programming & ladder diagram programming
Operation Feature: Cyclic program scanning with precise timing and fast response

2.2 Electrical & Communication Specifications

Power Supply: 24VDC rack backplane power supply, adaptive 19.2V~30VDC voltage fluctuation
Power Consumption: Low power design with low temperature rise for long-term operation
Bus Communication: High-speed dedicated FA-M3 backplane bus for I/O data interaction
Extended Protocol: Compatible with Modbus RTU/TCP, PROFIBUS DP
Signal Adaptation: Supports dry contact and wet contact dual signal types
Signal Threshold: High level 15V~30VDC, Low level 0V~5VDC
Protection: Over-voltage, over-current, surge and ESD protection

2.3 Diagnosis & Operation Characteristics

Power-on Self-test: Comprehensive self-inspection of CPU, storage, bus and firmware
Real-time Diagnosis: Detects program error, bus disconnection, I/O loss and operation overflow
Fault Reporting: Precise fault code positioning for quick troubleshooting
LED Indication: Onboard RUN/ERR/COMM status indicators
Online Maintenance: Supports online program monitoring and bumpless parameter modification
Fault Tolerance: Automatic fault tolerance to avoid equipment misoperation and system shutdown

2.4 Environmental & Protection Specifications

Operating Temperature: 0℃～+55℃ industrial standard temperature range
Storage Temperature: -20℃～+75℃ high and low temperature resistance
Humidity Range: 5%～95%RH (non-condensing), dust-proof and moisture-proof
Certification: CE, UL, CSA, RoHS industrial standard certification
Vibration Resistance: Reinforced PCB design for long-term vibrating conditions
Protection Grade: Indoor standard protection for industrial cabinet installation

2.5 Physical Structure Specifications

Structure Type: FA-M3 standard compact modular CPU card
Installation: Embedded mounting for FA-M3 standard rack
Structural Feature: Lightweight and reinforced structure with stable long-term operation
Durability: Industrial anti-aging process for 7×24-hour continuous operation

3. Working Principle

Power-on Initialization & Self-test: After backplane power-on, the module completes full hardware self-test, loads system firmware and user sequence control programs, initializes communication parameters and I/O mapping tables, and enters standby state.
Cyclic Program Execution: Scans and executes ladder logic and structured programs cyclically, completes sequence control, interlock judgment and timing logic operation to ensure accurate equipment action sequence.
I/O Data Acquisition & Interaction: Polls local and extended I/O modules via backplane bus, collects field switch and analog signals, and completes signal verification and engineering value conversion.
Control Operation & Command Output: Generates start-stop, interlock and reset commands based on field data and preset logic, and sends commands to output modules to drive field equipment.
Communication & Upper Interaction: Communicates with HMI, configuration software and field instruments, uploads operating status and fault information, and receives remote control commands.
Real-time Monitoring & Protection: Monitors hardware, program and bus status in real time. Triggers protection mechanism, locks operating state and uploads fault codes during abnormalities to avoid misoperation.

4. Application Scenarios

4.1 Small & Medium Equipment Main Control

Serves as the core control unit for HVAC, water treatment, packaging machinery and light industrial equipment, realizing automatic sequence start-stop, logic interlock and fault protection functions.

4.2 Factory Utility System Automation

Controls circulating water, compressed air and heat exchange auxiliary systems, realizes multi-equipment linkage control, condition monitoring and interlock protection to ensure stable operation of factory auxiliary facilities.

4.3 Legacy FA-M3 System Spare Part Replacement

Directly replaces aging faulty CPU modules without program and wiring modification, quickly restoring the overall operating performance of FA-M3 control systems and extending equipment service life.

4.4 Assembly Line Batch Automation Control

Adapts to industrial assembly line process sequencing and station linkage control, ensures stable operation rhythm and accurate action matching with high-speed logic operation capability.

4.5 Small System Expansion & Upgrade

Supports I/O point expansion and logic function upgrade of FA-M3 systems, realizing low-cost system performance optimization and control scale expansion.