Foxboro I/A Series Industrial Automation System

Control processors execute control logic (such as ladder logic, regulating control, sequential control) for I/A Series fieldbus modules and devices

2. Fieldbus Module

Core function: Connect traditional sensors, actuators, and I/A Series intelligent field devices, serving as a communication bridge between field devices and control processors.

（3） Network and Communication

Communication foundation: Following the Open Systems Interconnection (OSI) standard model and adopting communication standards specified by ISO and IEEE;

Network type: Nodes communicate through a single level or layered IEEE 802.4 network, rather than a proprietary network;

Supporting protocols/networks: TCP/IP, DECnet, NFS and other information network protocols, as well as fieldbus (supporting communication between control processors and remote fieldbus modules/devices).

System scale and deployment form

System scale deployment form, core components

Small system independent personal workstation or single node personal workstation, or single node with a small number of modules

Large scale system multi node distributed deployment with multiple nodes connected via IEEE 802.4 compatible carrier band LAN, enabling geographic distributed deployment of instrument equipment and functions through fieldbus

Modular expansion gradually expands from small-scale systems, gradually adding modules and nodes according to production needs and budgets, and upgrading to a factory level integrated system

Key issues

Question 1: What are the core architectural advantages of Foxboro I/A Series system? How to support its positioning as an "open industrial system"?

Answer: The advantages of core architecture are reflected in three aspects: modular design with "nodes" as the core, open features that follow international standards, and truly distributed deployment. The key to supporting the positioning of "open industrial systems" is to comply with international standards such as ISO, IEEE, OSI, etc., adopt non proprietary communication networks (IEEE 802.4), and seamlessly integrate with third-party devices/systems; Secondly, it supports flexible mixing of hardware and software modules, adapting to diverse scenarios ranging from small to large distributed systems; The third is to have backward compatibility, protect existing investments, and support third-party application access. It can integrate over 100 types of smart factory equipment and continue to expand with technological development.

Question 2: What are the key designs of Foxboro I/A Series system in terms of reliability and operational convenience?

Answer: Reliability design: ① The module adopts sturdy packaging and can withstand harsh industrial environments; ② Equipped with module self detection function, it can accurately locate faults through color coded indicator lights and messages; ③ Redundant hardware configuration that supports critical functions, with hardware redundancy completely transparent to software and instantaneous switching completion; ④ Equipped with network fault detection function to improve the efficiency of fault diagnosis. Convenient operation and maintenance design: ① Modular design, easy installation and replacement, automatic download of adaptation software after replacing faulty modules; ② The system can be modularized and gradually expanded without the need for a one-time large-scale investment; ③ The user interface is unified and friendly, supporting multi window and menu based configuration, reducing training costs.

Question 3: What are the types of processor modules in the Foxboro I/A Series system? What are their respective core functions and connection objects?

Answer: Processor modules are divided into four categories, as follows:

Module Type Core Function Connection Object

Application processor historical data collection and archiving, database management, coordination with other processor modules, high-capacity storage devices, Ethernet and other information networks

The workstation processor provides interface support, displays cross device X Window CRT, keyboard, alarm keyboard and other workstation devices, Ethernet and other information networks

Communication processors/interfaces/gateways enable cross device and cross network communication adaptation to RS232/485 devices, LAN/WAN, SPECTRUM, and other networks

Control processor executes control functions such as ladder logic, adjustment control, sequence control, etc. I/A Series fieldbus modules and equipment