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AssigneeSick AG
InventorsFranz DOLD, Markus SAUMER, Martin KUNZ
Estimating the term…
For the safe check of a state of an automation system using a simple, safe data transfer, a method is provided for a secure checking of a state of a first device and of a second device which are connected to one another via a first line and via a second line, wherein the first device transmits a signal characterizing the first device to the second device and receives the signal characterizing the first device back via the second line and the second device transmits a signal characterizing the second device via a second line to the first device and receives the signal characterizing the second device back via the first line, and wherein a defect case is determined on a change of one of the two signals.
A method for a safe checking of a state of a first and a second device which are connected to one another via a first and a second line, wherein the first device transmits a signal characterizing the first device via the first line to the second device and receives the signal characterizing the first device back via the second line and the second device transmits a signal characterizing the second device via the second line to the first device and receives the signal characterizing the second device back via the first line, and wherein a defect case is safely determined on a change of one of the two signals.
An apparatus for carrying out a method for a safe checking of a state of a first and a second device which are connected to one another via a first and a second line, comprising a first and a second device which are connected to one another via a first and a second line, wherein the first and second devices each have an answerback unit which is provided for generating a signal characterizing the device and for transmitting the signal characterizing the device via the first or second line to the connected other device, and wherein the respective answerback unit is configured for receiving the transmitted signal characterizing the device and for comparing the transmitted signals received back and characterizing the device such that a state of the connected other device and of the first and second line can be safely evaluated.
Dependencies are inferred from the claim text.