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GB/T 47014.4-2026Industrial communication networks - Fieldbus specifications - Type 2 elements: EtherNet/IP, ControlNet and DeviceNet specifications - Part 4: Applicatoin layer protocol specification (English PDF)

工业通信网络现场总线规范类型2元素：EtherNet/IP;ControlNet和DeviceNet规范第4部分：应用层协议规范

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Issued by

State Administration for Market Regulation

Level / Type

National · Recommended

Issue date

January 28, 2026

Implementation date

August 1, 2026

Scope

GB/T 47014.4-2026 is the English-translated version of 工业通信网络现场总线规范类型2元素：EtherNet/IP;ControlNet和DeviceNet规范第4部分：应用层协议规范.

GB/T 47014.4-2026 — Overview The Fieldbus Application Layer (FAL) provides user programs with a method to access the fieldbus communication environment. In this respect, the FAL can...

It is considered a "window" between the corresponding applications. This document outlines the basic time-strict and non-time-sensitive communication between applications in automated environments and materials specific to Type 2 fieldbus.

Time-strict message communication provides common elements. "Time-strict" indicates the existence of a time window within which communication must adhere to certain time limits. Complete one or more specified actions with the prescribed degree of certainty.

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Document preview — GB/T 47014.4-2026

National Standard of the People's Republic of China

ICS: 25.040
Classification: N 10

Issued by: State Administration for Market Regulation

Preface
Introduction
1 Scope
1.1 Overview
1.2 Standard
1.3 Consistency
2 Normative References
3 Terms, definitions, symbols, abbreviations, and conventions 4.
3.1 Terms and definitions from other ISO/IEC standards
3.2 Terms and Definitions in ISO/IEC 61158-5-2
3.3 Additional Terms and Definitions
3.4 Abbreviations and Symbols
3.5 Agreement
4 Abstract Syntax
4.1 FALPDU Abstract Syntax
4.2 Data Abstraction Syntax Specification
4.3 Encapsulating Abstract Syntax
5 Grammar
5.1 Compression encoding
5.2 Data Type Report
6 Structure of the FAL Protocol State Machine
7 AP-Context State Machine
7.1 Overview
7.2 Connecting Object State Machine
8 FAL Service Protocol Machine (FSPM)
8.1 Overview
8.2 Primitive Definition
8.3 Primitive parameter.200
8.4 FSPM State Machine.201
9 Application Relationship Protocol Machines (ARPMs)
9.1 Overview
9.2 Connectionless ARPM (UCMM)
9.3 Connection-Oriented ARPMs (Transport)
10 DLL Mapping Protocol Machine 1 (DMPM1)
10.1 Overview
10.2 Link Producer
10.3 Chain Consumer
10.4 Primitive Definition
10.5 DMPM State Machine
10.6 Data Link Layer Service Selection
11 DLL Mapping Protocol Machine 2 (DMPM2)
11.1 Overview
11.2 Mapping of UCMMPDU
11.3 Mapping of Transport Class 0 and Class 1 PDUs
11.4 Mapping of Transport Class 2 and Class 3 PDUs
11.5 IGMP Applications
11.6 Quality of Service (QoS) for CP2/2 packets
11.7 Using TCP Encapsulation
11.8 Encapsulate 258 bytes using UDP
12 DLL Mapping Protocol Machine 3 (DMPM3)
References
Table.199 Specific Services of Connection Manager
Table.200 Specific Services of Connection Objects
Table.201 Equipment Type Number

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents".

Drafting.

This document is based on GB/T 47014 "Industrial Communication Network Fieldbus Specification Type 2 Element. EtherNet/IP, ControlNet and..." Part 4 of the DeviceNet specification, GB/T 47014, has been published, including the following parts.

---Part 1: Data Link Layer Service Definition;

---Part 2: Data Link Layer Protocol Specifications;

---Part 3: Application Layer Service Definition;

---Part 4: Application Layer Protocol Specifications.

This document is equivalent to IEC 61158-6-2:2023 "Industrial communication networks - Fieldbus specification - Part 6-2.Application layer protocol specification".

Type 2 element.

The following minimal editorial changes have been made to this document.

---To align with existing standards, the standard name has been changed to "Industrial Communication Network Fieldbus Specification Type 2 Element.

EtherNet/IP, ControlNet and DeviceNet Specifications Part 4: Application Layer Protocol Specifications.

Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.

This document was proposed by the China Machinery Industry Federation.

This document is under the jurisdiction of the National Technical Committee on Standardization of Industrial Process Measurement, Control and Automation (SAC/TC124).

Introduction

This document, as part of the Type 2 series of documents, aims to facilitate easier interconnection between components of automated systems. This document is consistent with...

Other standards within the standard set established by the "three-layer" fieldbus reference model described in IEC 61158-1.

Application protocols utilize available services from data links or other directly lower layers to provide application services. The main purpose of this document is...

It provides a set of communication rules, which are represented based on the procedures executed by peer application entities (AEs) during communication. The purpose of these communication rules is...

It provides a solid foundation for development and serves the following purposes.

---A guide for designers and implementers;

---Used for testing and procuring equipment;

---As part of a protocol that allows the system to access an open systems environment;

---As a more precise understanding of time-strict communication within the OSI model.

This document focuses specifically on the communication and interconnection of sensors, actuators, and other automation equipment. By using this document and [the document located at...] the OSI or other standards within the fieldbus reference model allow incompatible systems to work together in any combination.

GB/T 47014 "Industrial Communication Network Fieldbus Specification Type 2 Elements. EtherNet/IP, ControlNet and DeviceNet" the standard is proposed to consist of four parts.

---Part 1: Data Link Layer Service Definition. The purpose is to define conceptual data link layer services applicable to time-strict communication.

The characteristics of the service.

---Part 2: Data Link Layer Protocol Specification. The purpose is to provide a set of communication rules that are used by peer data link entities in...

It is represented by the program to be executed during communication.

---Part 3: Application Layer Service Definition. The purpose is to define the application services that fieldbus applications and/or system management may utilize.

feature.

---Part 4: Application Layer Protocol Specifications. The purpose is to provide a set of communication rules, which are based on the communication between peer application entities.

It is represented by the program being executed.

Industrial Communication Network Fieldbus Specification Type 2 Elements. EtherNet/IP, ControlNet, and DeviceNet Specification Part 4: Application Layer Protocol Specification

1 Scope

1.1 Overview

The Fieldbus Application Layer (FAL) provides user programs with a method to access the fieldbus communication environment. In this respect, the FAL can...

It is considered a "window" between the corresponding applications.

This document outlines the basic time-strict and non-time-sensitive communication between applications in automated environments and materials specific to Type 2 fieldbus.

Time-strict message communication provides common elements. "Time-strict" indicates the existence of a time window within which communication must adhere to certain time limits.

Complete one or more specified actions with the prescribed degree of certainty. Failure to complete the specified actions within the time window will result in penalties.

The application of the request action has the risk of failure, and may also bring additional risks to equipment, factories and even people's lives.

This document specifies the interaction between remote applications and defines the externally visible behavior provided by the Type 2 fieldbus application layer, including...

The following aspects.

---Formal abstract syntax defines the application layer protocol data units transmitted between communication application entities;

---Transmission syntax defines the encoding rules applicable to application layer protocol data units;

---Application context state machine defines the application service behaviors visible between communicating application entities;

---The application relational state machine defines the visible communication behaviors between communication application entities.

The purpose of this document is to define the agreements used for the following purposes.

---Specifies the representation of service primitives as defined in GB/T 47014.3-2026 on network cables;

--- Specifies the externally visible behavior associated with its transmission.

This document specifies the Type 2 fieldbus application layer protocol, conforming to the OSI Basic Reference Model (ISO/IEC 7498-1) and OSI application layer protocol.

Layered structure (ISO/IEC 9545).

1.2 Standards

The primary purpose of this document is to define the syntax and behavior of the application layer protocol used to transmit IEC 61158-5-2 application layer standards.

Serve.

The second objective is to provide a path for migration from existing industrial communication protocols.

1.3 Consistency

This document does not specify a single implementation or product, nor does it restrict the implementation of application-layer entities in industrial automation systems. Consistency is achieved through...

This is achieved by implementing the application layer protocol specification.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 259 pages — is available in the English PDF.

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