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Fast, Synchronous PROFINET Communication for SIMATIC
Controllers
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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Diagnostic Analysis for PROFIBUS DP and PROFINET IO
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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Application Example "Diagnostics Procedure for
PROFINET Network Components"
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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Typical Response Time on PROFINET
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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SIMATIC ET 200M Available for PROFINET
The IM
153-4 PN interface module now enables connection of the ET 200M distributed I/O
system to PROFINET. In addition, the 153-4 module has an interface with integral
2-port switch and T functionality in the power supply. Up to 12 modules can be
plugged in within one station, saving space in the control cabinet. The channel
density can also be significantly increased by 64-channel modules ( 64
DI and 64
DO). |
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