Ethernet ¿? ... That word sounds familiar to us
The networking of millions of PCs in offices and the proliferation of the Internet around the world has made a universal standard in Ethernet networks.
The devices used in Ethernet and associated software have evolved to the point that even inexperienced users can configure networks and connecting computers together.
Ethernet devices are relatively inexpensive and can be purchased at any office equipment store, computer stores and online.
In contrast to the perception that the fieldbus is expensive, difficult to use and there are several vying for market dominance, Ethernet appears to be the panacea.
In addition, a study by a major automotive industry showed that Ethernet could potentially be useful in the 100% automation using field-level networks.
So: WHAT IS INDUSTRIAL ETHERNET?
Industrial Ethernet is a network based on standard IEEE802.3 standard industry parala specially designed equipment and facilities robust immune to noise.
Designed to work at the cell, but with a huge potential for entry-level fieldbus systems using standard protocols such as ISO and TCP / IP.
... however ... Industrial Ethernet does not guarantee interoperability
Ethernet is only a standard for the physical layer, similar to RS-232, in the same way as it is a phone line. Having a physical connection means that messages can be transmitted, but there is no guarantee that communication (information exchange) is successful. Just because you can make a call in Shanghai does not mean you can speak Mandarin.
... There's more ... TCP / IP does not guarantee interoperability
Integration of a network of PLCs THROUGH Industrial Ethernet Network.
There are many transmission protocols that can be used on Ethernet, the most popular and used in World Wide Web, is TCP / IP, which means Transmission Control Protocol / Internet Protocol.
When you download a file from the network, you can see how the transmission rate decreases as the traffic. TCP / IP is the mechanism that part of the file to download in packs of bits and reconstructs it on the other end.
TCP / IP was developed in order to ensure that messages always reach their destination. To take the example of the Web a little further, we've all experienced that after downloading a large file on our PC we discovered that we do not have the associated application to open it. So we ended up also downloading RealAudio or Winamp or Adobe Acrobat Reader so that we can open the file.
Exactly the same problem applies to industrial controls.
You can send a file or part of the information you want through ehternet or Internet, but the terminal receiver must know what to do with the information. TCP / IP does not guarantee you can open the file, only ensures that you reach your destination.
TECHNICAL
Norm | IEEE802.3 |
M é all access | CSMA / CD (Estoc to diagnosis). |
í Index of communicable or n | 10 to 100 Mbps |
Transmissible through or n | The é ctrica: shielded twisted pair or coaxial. Ó Optical: FOR (glass or pl to diagnosis). |
M to maximum n ú station number | 1 024, expandable routers (routers). |
Extensive network | The é ctrica: m to x. 1.5 km Ó Optical: m to 50 km s LAN: to 150 Km with TECHNOLOGY í to of Switching or n. WAN worldwide. |
Topology í to | Bus, ring, redundant ring, star, to tree. |
BENEFITS
- Ethernet is an international standard accepted almost everywhere in the world.
- Can handle large amounts of information at high speed.
- Serve the needs of large installations.
- Reliable data transmission even in high-interference environments.
