PROFINET

PROFINET IO also allows safety-related signals (e.g. emergency-stop motor) to be exchanged between the ET 200 distributed IO and a SIMATIC S7-CPU. For some applications, wireless communication (IWLAN) is the more cost-effective solution. In some cases, it is the only option, e.g. for communication between mobile or difficult-to-access areas in an automation system. A new use case describes this solution. To this end STEP 7 code can be downloaded free of charge.
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Many SIMATIC controllers, e.g. CPU 319-3 PN/DP, the PROFINET-CPUs of the S7-400, the new PROFINET-CPU of the ET 200S and the new SIMATIC S7 modular embedded controllers, now communicate by means of high-speed IRT (isochronous real time). High-speed communication is used predominantly in larger machines and process cells, if numerous nodes are interconnected on a linear basis with very short update times. Or if the same network is used for PROFINET communication and parallel standard communication, e.g. TCP/IP, with a high volume of data.
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The PNIODiag diagnostics package simplifies the analysis of distributed IO modules with SIMATIC S7-CPUs – both for PROFIBUS DP systems and for PROFINET IO systems. The diagnostics package contains a function block for the S7-CPU and visualization for WinCC flexible in German and English.
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A PROFINET I/O system with various network components is to be monitored. The automation solution comprises a PROFINET IO Controller, an HMI station as well as a SCALANCE X208, a SCALANCE X202 and two ET 200S PN FO modules as PROFINET devices. In addition to individual diagnostics of the components, it should also be possible to provide detailed diagnostics of the complete system. The application example comprises documentation and program code.
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Many applications call for a fast response time via the distributed I/Os. To exchange data quickly and efficiently between the distributed I/O and S7 stations, the SIMATIC uses PROFIBUS DP and also PROFINET IO. Typical PROFINET IO configurations consist of an I/O controller with several I/O devices, whereby programming devices (PG) or HMI devices (panels) are used on the Industrial Ethernet. One of the most important questions concerning the arrangement of such configurations relates to the expected response times.
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