Safety-related data transfer in secure virtual automation networks

Safety related applications in the industrial automation area are becoming more and more important. For the safety aspects in an automation plant there is the generally standard IEC 61508 which is a basic functional safety standard applicable to all kinds of industry. The intended functions of a safety system, with their (several) safety functions, must be executed under defined fault conditions with a defined high probability. However safety systems are more or less closed systems. In case of using open communication systems within a safety system like wireless communication (e.g. Bluetooth, WLAN) or particularly if private/ public networks are used (e.g. Ethernet, Internet), the consideration of IT-Security is absolutely necessary and required respectively. The use of the brand-new procedure model which is part of the VDI/VDE guideline 2182 within the VAN project was applied. The first time use of this model was a challenge and also a benefit for the project.