To increase the communication availability of the field devices, they are connected to the CPUs via a Profinet ring. All nodes are thus still accessible in the event of a fieldbus interruption. To enable this, the field devices, such as the Simatic ET 200SP distributed I/O system, must support S2 redundancy. In further steps, redundant Profinet networks will also be supported.
Siemens offers the right controller for an extremely wide range of automation requirements. The scalable Simatic range of controllers, comprising Basic, Advanced, Distributed and Software Controllers, all have the same range of functions. The S7-1200 Basic Controllers are used for compact automation solutions, and the S7-1500 Advanced Controllers for complex tasks, while the ET 200SP Distributed Controllers are suitable for distributed applications, and the Software Controllers for PC-based applications.
For further information, refer to www.siemens.com/simatic-controller