Siemens Aktiengesellschaft

Wolfgang Stripf

Herbert Barthel

Volker Wendel

A method for fail-safe transmission of information between a transmitter and a receiver is disclosed. At least two telegrams relating to the information are transmitted as a first telegram via a first channel and a second telegram via a second channel from the transmitter to the receiver. To identify an error affecting the information during transmission, a first identifier is generated from a first subset of the first telegram being used at the receiver to identify the information contained in the first telegram. This method is used for communication from a safety switching device to a control unit.

Method for fail-safe transmission, safety switching device and control unit

A microprocessor-controlled standard field device, such as a measuring sensor or an actuator, is connected to a field bus system that, in turn, is connected to, for example, a freely programmable controller. The field device is equipped with a security layer for carrying out a security proven communication. A secure and simultaneously cost-effective communication with a control device via a field bus system is made possible by implementing a security layer in, e.g., a conventional operationally proven or redundant standard field device.

Microprocessor-controlled field device for connection to a field bus system

A programmable controller suitable for use in a globally distributed automation network. In addition, a universal management engineering and information system for such a globally distributed automation network is described. It is used in a globally distributed automation network.

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Karlsruhe, Germany

Wolfgang Stripf