Method for storing plant process signals
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Abstract
Disclosed is a method for storing process signals of a plant or technical installation. A compression method is adapted for a current operating state of the plant is applied to the set of process signals in accordance with the current operating state of the plant and a compressed process signal set which is determined during the application of the compression method is stored.
36 Citations
18 Claims
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1-7. -7. (canceled)
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8. A method for storing plant process signals for a plant having at least two operating states comprising:
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determining the current operating state of the plant;
applying a corresponding compression method for the current operating state to a set of process signals, wherein said applying the compression method comprises;
acquiring process signals at definable time intervals;
storing the process signals first in a header buffer at an instant other the instant corresponding to the current operating state;
examining the process signals to ascertain whether a process signal has remained within an amplitude band since it was last stored and how long ago it was last stored, wherein the examining step involves selecting the size of the amplitude to correspond to the current operating state of the plant; and
storing the process signal as a part of a compressed signal set if it was last stored longer ago than a predefined time interval. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification