SIEMENS Automation and Drives (A&D) has added new functions to the operating system for the Simatic S7-400.
The new version offers "isochrone mode" for high-speed machine applications with distributed sensors and actuators.
And in applications with "non-stop requirements", that is in plants that must not be shut down, hardware configuration changes can now be made during operation.
With the new "isochrone mode" system function, the Simatic S7-400 now also executes high-speed operations with defined and reproducible process response times.
The new function is especially suitable for high-speed machine applications with distributed structures. For this purpose, the entire automation solution, from the CPU right down to the connected I/O modules, is synchronised with the cycle of the "isochronous" Profibus.
This cycle is the default for all modules and results in isochronous and synchronous signal processing. In this way, all data are transferred consistently - that is, logically and in the correct time sequence.
User-friendly parameterisation and startup of an isochronous system is possible with the Step 7 Engineering Tool that automatically calculates the cycle parameters.
An extensive range of components is available to supplement the Simatic S7-400 in setting up isochronous automation solutions.
These include the Simatic ET 200S and ET 200M distributed I/O, the Simatic FM 458-1 DP application module for Simatic S7-400 and the real-time-enabled Simatic WinAC RTX PC-based control system.
In the new version of the operating system, plant configurations can now be changed during operation. This is of particular benefit in applications with non-stop requirements.
Expansions and modifications are simpler and quicker - for example, when you need to make process-related changes, or optimise processes. Distributed I/O devices are added, removed, and re-parameterised without reaction, that is, without disturbing operation.