EtherNet/IP Protocol

Table of Contents

1. Overview
2. Quick Link
3. Key Features
4. Communication Methods
5. Message Types
6. Service Codes
7. Object Model
8. Data Types
9. Error Codes

Overview

EtherNet/IP (Ethernet Industrial Protocol) is a standard ethernet communication protocol for industrial automation. It is based on CIP (Common Industrial Protocol) and supports real-time data exchange in manufacturing environments.

Quick link

Related Protocols: SECS/GEM | Modbus | OPC UA | RTSP

Key Features

• Standard Ethernet: Utilizes standard TCP/IP and ethernet technologies
• Real-time Communication: Real-time data exchange based on UDP
• Scalability: Supports large-scale network configurations
• Interoperability: Compatibility between various vendor equipment
• Security: Provides industrial security features

Communication Methods

Method	Description	Protocol	Purpose
Explicit Messaging	Client-server communication	TCP	Configuration, diagnostics, non-real-time data
Implicit Messaging	Real-time data exchange	UDP	Real-time control data
I/O Messaging	I/O data exchange	UDP	Sensor/actuator data

Message Types

Type	Description	Characteristics
Request	Request from client to server	Explicit messaging
Response	Response from server to client	Explicit messaging
I/O Data	Real-time I/O data	Implicit messaging
Heartbeat	Connection status check	Periodic messaging

Service Codes

Code	Description	Purpose
0x01	Get_Attribute_Single	Read single attribute
0x02	Set_Attribute_Single	Write single attribute
0x03	Get_Attribute_All	Read all attributes
0x04	Set_Attribute_All	Write all attributes
0x05	Reset	Device reset
0x06	Start	Device start
0x07	Stop	Device stop
0x08	Create	Object creation
0x09	Delete	Object deletion
0x0A	Multiple_Service_Packet	Multiple service packet

Object Model

Object	Description	Function
Identity Object	Device identification information	Provides device information
Message Router Object	Message routing	Message processing
Assembly Object	Data assembly	Data packaging
Connection Object	Connection management	Communication connection management
TCP/IP Object	TCP/IP configuration	Network configuration

Data Types

Type	Description	Size
BOOL	Boolean value	1 bit
SINT	8-bit integer	1 byte
INT	16-bit integer	2 bytes
DINT	32-bit integer	4 bytes
REAL	32-bit real number	4 bytes
STRING	String	Variable length
ARRAY	Array	Variable length

Error Codes

Code	Description
0x00	Success
0x01	Invalid Command
0x02	Insufficient Memory
0x03	Incorrect Data
0x04	Invalid Attribute Value
0x05	Invalid Attribute
0x06	Service Not Supported
0x07	Invalid Parameter
0x08	Lost Connection
0x09	Invalid Segment
0x0A	Invalid Service Request