Beckhoff Automation Gmbh

Martin Früchtl

Jens Sachs

Frank Schiller

A method is described for operating a computer system comprising a computer and a display unit, wherein a reference pattern is formed based on input value fed into the computer, wherein image signals for the display unit are generated based on the input value, wherein the image signals fed to the display unit are detected, wherein the detected image signals are subjected to a pattern recognition to provide a recognized pattern, and wherein the recognized pattern is compared with the reference pattern.

Method and device for verifying a data display in a security-critical system

A device comprises a first time generator for generating an internal time signal, a unit for receiving an external time signal at discrete synchronization times and a generator unit for producing a generated time signal, which generator unit is designed to calculate on the basis of an algorithm the generated time signal at a determination time between two synchronization times from a value of the external time signal at a previous synchronization time and from a value of the internal time signal at the determination time. Said algorithm includes an assumption of a proportionality between an advance in the internal time signal and an advance in the external time signal.

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Bad Sassendorf, Germany

Martin Früchtl