Method for Sensing Input Signal Changes
First Claim
1. A method for sensing input signal changes at an input of an input/output module operated in an automation system, comprising:
- sampling a signal by the input/output module and generating a change event and a timestamp associated with the change event when a change in the signal occurs;
storing a value pair comprising the change event and the timestamp in a higher-ranking automation component having a higher ranking than the input/output module; and
operating the input/output module and the higher-ranking automation component clock-synchronously with respect to one another by a clock pulse, the timestamp being calculated centrally on the higher-ranking automation component based on the clock-synchronous operation.
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Abstract
A method for sensing input signal changes at an input of an input/output module operated in an automation system in which a signal is sampled by an input/output module. A change event and a timestamp associated with the change event are generated when a change in the sampled signal occurs and a value pair comprising the change event and the timestamp is stored in a higher-ranking automation component to the input/output module. The input/output module and the higher-ranking automation component are operated clock-synchronously with respect to one another by a clock pulse, and the timestamp is calculated centrally on the higher-ranking automation component based on the clock-synchronous operation.
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Citations
9 Claims
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1. A method for sensing input signal changes at an input of an input/output module operated in an automation system, comprising:
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sampling a signal by the input/output module and generating a change event and a timestamp associated with the change event when a change in the signal occurs; storing a value pair comprising the change event and the timestamp in a higher-ranking automation component having a higher ranking than the input/output module; and operating the input/output module and the higher-ranking automation component clock-synchronously with respect to one another by a clock pulse, the timestamp being calculated centrally on the higher-ranking automation component based on the clock-synchronous operation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification