Simply said, PROFINET=PROFIbus+etherNET, ported to Profibus master/slave structure on Ethernet, PROFINET Controller and Device, they can simply corresponds to the PROFIBUS Master and Slave, of course, there is a difference, but it can help you understand. In addition because of Ethernet based PROFINET is, you can have an Ethernet star, tree, bus type, such as topology, PROFIBUS–only bus. PROFINET is the PROFIBUS Master/slave structure and the result of combining Ethernet topology, characteristic of other Siemens advocates such as isochronous Ethernet, PROFINET as Controller the control unit can just improve the accuracy of isochronous.
PROFINET: a new Ethernet communications system, was developed by Siemens and Profibus user. PROFINET communications capabilities between multiple manufacturers ‘ products, automation and engineering models and optimized for distributed intelligent automation systems. Its application to save the configuration and commissioning costs. Integrated system based on Profibus PROFINET systems provides investment protection for the existing system. It can also integrate other fieldbus systems.
PROFINET is an advanced communication system that supports distributed automation. In addition to the communications function, PROFINET also includes the concept of distributed automation specification, which is based on manufacturer–independent object and the connection editor and the XML device description language. Ethernet TCP/IP for communication between intelligent devices not strict with time. All time–critical real-time data is transmitted over a standard Profibus DP Technology, data is available through integrated PROFINET, Profibus DP network system. PROFINET is the only existing IT standards, bus special industrial application protocols is not defined. Its object model is based on the Microsoft component object model (COM) technology. For all interactions between distributed objects on a network, using Microsoft‘s DCOM protocol and standard TCP and UDP protocols.
In the PROFINET concept, equipment and factories into the technology modules, each module includes a mechanical, electronic and software applications. Application of these components have access to private development and download the programming tool to the controller. These dedicated software must implement PROFINET component software interface, PROFINET object definitions can be exported as an XML language. PROFINET connection to enter a manufacturer–independent XML file editor to generate a PROFINET component. PROFINET connection editor to the network components between the Exchange operation is undefined. Eventually, downloaded via Ethernet connection information TCP-IP to PROFINET device.
PROFINET (real-time Ethernet) based on industrial Ethernet and has a good real time, you can directly connect field devices (using the PROFINET IO), modular design, PROFINET supports the automation of distribution control (PROFINET CBA, equivalent to master of communication).
After Ethernet applying to industrial control, improved for industrial Ethernet, industrial Ethernet. If you‘ve ever used Siemens CP343-1 or CP443-1 address of the network card, may have used the ISO or TCP connections, and so on. It uses TCP and ISO is applied to the industrial Ethernet protocols.
PROFINET is also one of Siemens SIMATIC NET protocols, specifically, is a collection of a large number of agreements, including the PROFINET IO RT, CBA RT and IO IRT real-time protocol and so on. So industrial Ethernet PROFINET and not only industrial Ethernet PROFINET real-time protocol that runs on. But now often refer to some network is a PROFINET network, it will be because the PROFINET Protocol is used on the network.
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