EtherNet/IP
EtherNet/IP™ (ENIP) is an Ethernet communication network that provides users with the tools to deploy standard Ethernet technology (IEEE 802.3 combined with the TCP/IP Suite) in industrial automation applications while enabling Internet and enterprise connectivity.
EtherNet/IP offers various network topology options including star or linear with standard Ethernet infrastructure devices utilizing the “Common Industrial Protocol” (CIP™).
Like all CIP Networks, EtherNet/IP utilizes CIP™ for its upper layers. CIP Networks follow the Open Systems Interconnection (OSI) model, which defines a framework for implementing network protocols in seven layers: physical, data link, network, transport, session, presentation and application. Networks that follow this model define a complete suite of network functionality from the physical implementation through the application or user interface layer.
Topologies are comprised of a Master or Scanner (also called the Originator) and an end-point device or slave called the Adapter (also called the Target).
The following gives a summary Table for the Messaging types and their characteristics:
Item |
EXPLICIT Messaging |
IMPLICIT Messaging |
|---|---|---|
Characteristics |
Requests & defines information |
Data only, no protocol information |
Form of Messaging |
Unconnected or Class 3 Messaging |
Connected or Class 1 Messaging |
Typical Application |
Diagnostic/Event/Config Data |
Real-time Control Data |
Originator (Master) |
Controller = “Client” |
Controller = “IO Scanner” |
Target (Slave) |
Field Device = “Server” |
Field device = “IO Adapter” |
Communications Layer |
TCP/IP |
UDP |
General Specifications
Maximum Adapter nodes supported per Scanner: 64 Adapters
Maximum Scanner Connections per Server/Adapter: Up to eight(8) Class 1 Implicit or eight(8) Class 3 Explicit connections.
Note
All the EtherNet/IP device libraries are included free in the P2CDS-622 system. The license is automatically enabled.
The CODESYS Scanner Datasheet can be downloaded from- Scanner
The CODESYS Adapter Datasheet can be downloaded from- Adapter
Scanner
The CODESYS EtherNet/IP Scanner is offered as part of the P2CDS-622 development environment and uses the standard Ethernet ports on the CPU. The bus is configured directly from within the CODESYS Development System. Devices that are configured in this way exchange Ethernet messages with interconnected EtherNet/IP Adapters.
Scanners create connections and scan I/O. The EtherNet/IP scanner can communicate in real time with connected adapters, read their inputs, and write to their outputs. All parameters for communication are predefined in the configurator. These parameters include IP addresses or network cards and adapters, the connections and their properties, the RPI (Requested Packet Interval), as well as the user parameters.
FEATURES
All parameters for communication are predefined in the configurator.
Configurator
Editors
Ethernet Bus Editor
EtherNet/IP Scanner Editor
EtherNet/IP Remote Adapter Module Editor
Communication Settings
IP Address
Electronics Keying
Connections and configuration data
Input/Output Assembly layout
Diagnosis
Display of device state
Display of connection errors
EDS Import
Supported
IEC Stack
Supported Platforms
32/64 bit
Little/Big Endian
Specification
CIP Networks Library Volume 1 and 2
Max. number of Slaves/Connections
64
Connection Types
Class 1 (I/O Messaging)
Class 3 (Explicit Messaging)
UCMM
I/O Connection Types
Point to Point and Multicast
Cyclic Transmission
Exclusive Owner, Listen Only, Input Only
Minimum RPI
1 ms
Supported Objects
Identity Object
Message Router Object
Connection Manager Object
TCP/IP Interface Object
EtherNet Link Object
Large ForwardOpen
(supported)
CIP Motion
(not supported)
CIP Sync
(not supported)
Device Level Ring (DLR)
(not supported)
API
EtherNet/IP Services IEC Library (Function Blocks)
Get_Attributes_All, Get_Attributes_Single
Set_Attributes_All, Set_Attributes_Single
Start/Stop/Reset
Apply_Attributes
NOP
Generic Service
Visualization Templates
API IEC Stack (Function Blocks)
State/Diagnosis variables for Scanner and Adapters
Ethernet status information
Reset of Scanner and Adapter
Generic Device Diagnosis
Reconfigure
Adapter
The CODESYS EtherNet/IP Adapter is an add-on for CODESYS compatible PLCs and uses the CPU Ethernet ports.
The bus is configured directly from within the CODESYS Development System. Adapters are End-point devices and are configured to exchange Ethernet messages with interconnected EtherNet/IP scanners.
FEATURES
The communication parameters are predefined in the configurator, such as the settings of the Ethernet adapter
Configurator
Editors
Ethernet Bus Editor
EtherNet/IP Adapter Editor
EtherNet/IP Module Editor
Communication Settings
IP Address
Device Identification (Vendor ID, Product Code, …)
I/O Data Layout (module configuration)
Diagnosis
Display of device state
Display of connection errors
EDS Export
Export of an EDS file suitable for the configuration.
IEC Stack
Supported Platforms
32/64 bit
Little/Big Endian
Specification
CIP Networks Library Volume 1 and 2
Max. Number of Connections
Up to eight (8) Class 1 Connections and eight (8) Class 3 Connections.
I/O Connection Types
Point to Point
Cyclic Transmission
Exclusive Owner, Listen Only, Input Only
Max. Number of I/O Assemblies
The supplied EDS files support only one Input and Output Assembly by default. A custom EDS file can be generated via the CODESYS IDE.
4 Scanners with 8 Connections per. maximum.
Configuration Assembly
(not supported)
Connection Types
Class 1 (I/O Messaging)
Class 3 (Explicit Messaging)
UCMM
Maximum Connection Types
Class 1 (I/O Messaging) - 8 total
Class 3 (Explicit Messaging) - 8 total
Minimum RPI
1 ms
Supported Objects
Identity Object
Message Router Object
Assembly Object
Connection Manager Object
TCP/IP Interface Object
EtherNet Link Object
ACD
(currently not supported, see Errata section)
CIP Motion
(not supported)
CIP Sync
(not supported)
Device Level Ring (DLR)
(not supported)
Example Projects
Examples projects a located at these links for Implicit Mode and for Explicit Mode