SIEMENS
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Siemens D 21.4 · 2017
Communication
EtherNet/IP
5
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Overview
Ethernet Industrial Protocol (EtherNet/IP) is an open standard for
industrial networks. EtherNet/IP is used to transmit cyclic I/O
data and acyclic parameter data. EtherNet/IP was developed by
the ODVA (Open DeviceNet Vendor Association), and belongs
to the international standard series IEC 61158.
■
Overview
The Ethernet protocol Modbus TCP is an open standard for
industrial networks. Modbus TCP is used to transmit acyclic
register data. Modbus TCP has been standardized in the inter-
national series of standards IEC 61158 since 2007.
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Overview
CANopen is a communication protocol based on CAN physical
characteristics, which is predominantly used in the automation
industry and for networking within complex devices. Originally
conceived as a fieldbus for networking devices in motion control
applications such as handling systems, CANopen has since
established itself in the field of medical engineering, vehicle
automation, rail and ship networking as well as building automa-
tion. Interoperability of CANopen is ensured through the use
of application and device profiles, whereby the wide range of
options offered by the bus specification enables an appropriate,
precise selection to be made for the application or device in
question. Furthermore, inverters with CANopen support the
"CiA 402 Electrical Drives" device profile.
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Overview
As a simple fieldbus protocol, USS (
U
niversal
S
erial
I
nterface
protocol of Siemens AG, 1992) can be used both cyclically and
acyclically. Based on RS485 physical bus characteristics, up to
32 nodes can be networked to one bus segment and connected
to a higher-level controller. This protocol is generally used when
there are limited demands on data throughput.
Modbus TCP
CANopen
USS
© Siemens AG 2017