Deployment; Basics Ethernet/Ip - YASKAWA VIPA IM 053IP Manual

Deployment

Basics EtherNet/IP

4 Deployment
4.1 Basics EtherNet/IP
General
EtherNet/IP
EtherNet/IP in the ISO/
OSI layer model
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EtherNet/IP (Ethernet Industrial Protocol) is an open standard for
industrial networks, which is real-time capable. EtherNet/IP is devel-
oped by ODVA (Open DeviceNet Vendor Association) and is standar-
dized in IEC 61158. Especially in the U.S. market EtherNet/IP is a
standard in communication.
EtherNet/IP bases on TCP/IP. As user protocol CIP (Common Indus-
trial Protocol) is used. CIP bases on a object model , which consists
of classes, attributes, methods, states and instances. In contrast to
the classical source-destination model, EtherNet/IP uses a modern
producer/consumer model that requires data packets with identifier
fields for the identification of the data. This approach caters for mul-
tiple priority levels, more efficient transfers of I/O data and multiple
consumers for the data. A device that has data to send produces the
data on the network together with an identifier. All devices requiring
data listen for messages. When devices recognize a suitable identi-
fier, they act and consume the respective data.
Via EtherNet/IP 2 types of messages are transported:
Implicit - Messages for time-critical and control-oriented data,
communi- which are exchanged in a single or multiple cyclic con-
cation nections. This connection is especially used for I/O
data. For this the UDP protocol is used.
Explicit - Here multipurpose point-to-point communication paths
communi- between two devices can be established. These are
cation used in the configuration of the physical coupler and for
diagnostics. This data are transferred with the TCP/IP
protocol.
The so called ISO/OSI layer model is generally accepted for the
standardization of computer communication. The layer model is
based upon seven layers with guidelines for the deployment of hard-
and software.
Layer Function
Layer 7 Application Layer (application)
Layer 6 Presentation Layer (presenta-
tion)
Layer 5 Session Layer (session)
Layer 4 Transport Layer (transport)
Layer 3 Network Layer (network)
Layer 2 Data Link Layer (security)
Layer 1 Physical Layer (bit transfer)
VIPA System SLIO
Protocols
TCP
Ethernet MAC
HB300 | IM | 053-1IP00 | GB | 13-50
CIP
UDP
IP
Ethernet