Ethernet/Ip - Siemens S7-1200 Manual

2 Introduction
2.2

EtherNet/IP

Even though in the above schematic setup the cables are named with PROFINET/
IE, any other Ethernet based protocol can co-exist on the same network. Especially
if such protocol uses IP as networking protocol and either TCP or UDP as transport
protocol.
EtherNet/IP is such a protocol. It is Ethernet based (IEEE 802.3) and uses IPv4 as
networking protocol as well as TCP and UDP as its transport protocol. EtherNet/IP
is an open standard maintained by the ODVA® (Open DeviceNet Vendor
Association). Yet it should not be mixed up with so called TCP native/ socket
communications.
EtherNet/IP is a best effort approach to achieve higher performance and lower jitter
compared to regular TCP communications while maintaining maximum
interoperability to the other TCP or UDP based communication protocols.
The IP in the name EtherNet/IP is not to be mixed up with IPv4. It is an
abbreviation for CIP (Common Industrial Protocol). This CIP is embedded into the
payload of the TCP or UDP packets used to exchange data between two or more
devices.
The devices creating an EtherNet/IP network are called:
•
Scanner, which are scanning the network. They are collecting the information,
such as sensor data, from the other field devices. In PROFINET terms this
would be equivalent to a Controller or a Master on other networks
•
Adapter, which are providing such sensor data to the Scanner. The adapters
translate the EtherNet/IP protocol into a proprietary intra device protocol. The
adapt the protocols. The PROFINET equivalent term is Device or Slave on
other networks.
As the Open User Communication allows a SIMATIC programmer to create the
payload for packets send via UDP or TCP, the SIMATIC can implement the
necessary features and functions to provide EtherNet/IP as loadable function block.
This functionality can be used with any Open User Communication capable
interface of the SIMATIC, such as integrated PROFINET ports as well as Industrial
Ethernet CMs and CPs.
EtherNet/IP Scanner
Entry-ID: 109782314, V1.1.0, 04/2021
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