EtherNet/IP (EtherNet Industrial Protocol, often just called EIP) is an Ethernet-based fieldbus.

Ethernet is not the same as Ethernet. In addition to the different speeds of 10, 100 and 1000 MBaud
must be a distinction between half and full duplex communication. Halfduplex – the data transfer,
which is alternately in one and in the other direction – transfers, compared to full-duplex, less than half,
because after the transfer in one direction, pauses must be met in order to compensate for the transit
and response times.

Between Profinet and Modbus/TCP is EtherNet/IP a currently popular Ethernet-based fieldbus, which
was published since 2000 as an open industry standard. In the period between 2002 and 2006 sold
over a million field devices. Currently support about 150 manufacturers in the ODVA this bus protocol.

Based on standard TCP and UDP support EtherNet/IP is the continuity between office network and
the system to be controlled.EtherNet / IP devices support DHCP and BootP in the award of IP address.

Like any standards-compliant Ethernet is also suitable EtherNet/IP is not for "hard" real-time applications
(<1ms) as the control of servo motors. The typical cycle time of an EtherNet/IP network is 10 ms, thus
satisfying real-time software requirements for industrial I/O's. For hard real-time requirements, however,
Allen Bradley or CIPsync MotionSync presented a protocol extension for EtherNet/IP, according to the
precise means of Zeitsynchronisaton. IEEE1588 the jitter for the control of servo motors to values ​​in the
sub-microsecond range reduced.

Based on Allen-Bradley DeviceNet was developed with EtherNet/IP Fieldbus a modern, integrated over
the EtherNet/IP networked devices seamlessly - by automatically mapping in the I/O tree of RSLogix
programming tools, with minimal configuration.Optionally, the known configuration of DeviceNet from
the software tool (RSNetworx) to integrate other field devices are used in the network.