Redundant server systems for increased plant availability

The S7 OPC Redundancy application allows the design of redundant server systems for fail-safe connection of HMI devices within Industrial Ethernet or PROFIBUS networks. OPC is a standardized and open interface for connecting Windows applications using various protocols such as S7-communication, Profinet and SNMP. The extended development version, OPC UA, additionally provides security and redundancy functions, for example.

Within a redundant server structure, a backup server immediately assumes the functions of the failed OPC UA server in the event of a power outage or system failure. In this way, connected clients such as HMI devices can access the central data and remain operational without interruption. The new Siemens software thus increases the availability of automation data to HMI systems. In normal operation, the clients are distributed evenly across all connected servers, providing improved utilization of IT resources.

PCs with the Windows Server operating system, Simatic Net S7 basic software, and the new S7 OPC Redundancy application are required to establish a redundant OPC UA server system. The OPC UA server is synchronized using high-performance Industrial Ethernet access points with a bandwidth of 10, 100 or 1,000 Mbit/s. No additional wiring is required. The connected OPC clients require the appropriate OPC UA support for communication. Existing standard OPC UA clients with reconnect functionality in accordance with the OPC UA specification can continue to be used.

The Siemens Industry Sector (Erlangen, Germany) is the worldwide leading supplier of environmentally friendly production, transportation, building and lighting technologies. With integrated automation technologies and comprehensive industry-specific solutions, Siemens increases the productivity, efficiency and flexibility of its customers in the fields of industry and infrastructure. The Sector consists of six divisions: Building Technologies, Drive Technologies, Industry Automation, Industry Solutions, Mobility and Osram. With around 204,000 employees worldwide (September 30), Siemens Industry posted total sales of around €35 billion in fiscal year 2010. http://www.siemens.com/industry

The Siemens Industry Automation Division (Nuremberg, Germany) is a worldwide leader in the fields of automation systems, industrial controls and industrial software. Its portfolio ranges from standard products for the manufacturing and process industries to solutions for whole industrial sectors that encompass the automation of entire automobile production facilities and chemical plants. As a leading software supplier, Industry Automation optimizes the entire value added chain of manufacturers – from product design and development to production, sales and a wide range of maintenance services. With around 33,000 employees worldwide (September 30), Siemens Industry Automation posted sales of €6.2 billion in fiscal year 2010. http://www.siemens.com/industryautomation

Reference Number: IIA2011042622e