Sick Ag

Jens Niehus

Franz Dold

Martin Geiler

Franz Josef Dold

A method of secure transmission of data signals over a bus system is described, where the data signals are generated by at least one sensor and are transmitted over the bus system to at least one actuator. The data signals generated by at least one of the sensors are encoded according to a predetermined secure encoding method before being introduced into the bus system. The encoded data signals are fed into the bus system and transmitted over it. The encoded data signals are received by at least one of the actuators and decoded according to a decoding method corresponding to the predetermined secure encoding method. In addition, an electronic monitoring system is described for carrying out this method.

Method and device for secure transmission of data signals over a bus system

A safety switching arrangement has at least two break switches ( ) which are connected in series to an evaluation unit ( ), in which case the evaluation unit ( ) initiates a safety signal, in particular an alarm signal and/or disconnection signal, when at least one of the break switches ( ) opens, and determines which of the break switches ( ) has opened. At least one, and preferably all, of the break switches ( ) has or have an associated code signal generator ( ) which, when the associated break switch ( ) opens, supplies to the evaluation unit ( ) a code signal which is characteristic of the relevant break switch ( ) via a line, in particular a diagnosis line ( ) or safety line sections ( ), which leads to the evaluation unit ( ) and is common to all the break switches ( ) associated with a code signal generator ( ), which code signal is analyzed in the evaluation unit ( ) and is identified as coming from the relevant break switch ( ).

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Strasbourg, France

Jens Niehus