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Ethernet/IP

offers users tools to use standardized Ethernet technology for production applications with Internet and Enterprise connectivity

Data is available at anytime and everywhere. Even DeviceNet uses CIP; therefore, there is a continuous secured automation structure. Also comparable to DeviceNet is the EtherNet/IP protocol which is transferred via UDP/IP and TCP/IP. The CIP offers a wide range of messages and services to capture the data of the production automation, among others there is information for controller, functional security, synchronization, motion and configuration. CIP is media independent and offers users consistent communication architecture throughout the whole production process. Users can benefit from numerous advantages of open networks, while at the same time automation investments in future system updates and protected.

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Profinet

combines the experience that Profibus and Industrial Ethernet had for years in one technology.

The concept is modular allowing the user to choose from a cascade of functions. It essentially differs in data exchange to satisfy the occassionally high speed requirements. PROFINET IO is developed for real time (RT) and for isochronous real time (IRT) with descentralized periphery. PROFINET is designed for a fast data exchange between Ethernet based field devices and follows the provider /consumer model. An Application relation (AR) will be built between a controller and a device. Over this AR communication relations, different features for transfer will be determined, such as ciclycal data exchange and alarm. The features of the device are in a general station description (GSD) specified by the manufacturer. The GSD file provides the basis of an energy system to plan the configuration of a PROFINET IO system.

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EtherCAT

data of I/O nodes, encoders, drives, etc. are not sent in individual telegrams

All of the information is rather sent from one participant to the other, and each one takes out its destined information or data. Therefore, every participant can display its information at their destined location at the same time. This allows for very short running time per node. The common use of this telegram is shown in a high rate of the user data. According to the group of standardizations there can be a rate of user data of 90%. The easiest case, EtherCAT communicates solely in its own subject. The optimized EtherCAT protocol is transported directly in an Ethernet frame. The sequence of the data does not depend on the physical sequence of the nodes. It can arbitrarily direct within the size of the 4MB process image. In doing so, you can realize all the necessary industrial topologies like bus, star and line.

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Ethernet PowerLink

Ethernet Powerlink meets real time demand by using enhanced time slicing or polling methods.

A network with Ethernet Powerlink is comparative with other Ethernet applications. Powerlink is compatible with CANopen Standard Device profiles according to EN50325-4. Depending on the network segment, Powerlink can respond to up to 240 nodes, it is hot plug capable and does enable direct communication between slaves.
One of the nodes in the newtwork is the managing node that according to the time slicing method assigns the bus rights. It assigns sending rights to the control nodes and calls up individual data over polling. After the communication synchronization phase, more asynchronous data can be exchanged.
Similar to CANopen,process data objects can be accessed over individual parameter and data sets. The structure of each nide is determined in the object directory.
Within the network, Ethernet Powerlink does work with fixed addresses (Class c,254 available addresses). Communication with other networks only take place over a router to secure the network trafic. It is possible to access each node over network address installation. The address is set indvidually in each node itself. Within a Powerlink network there are just Powerlink comform slaves allowed to guarantee a time synchronous data traffic.

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