US 12,411,483 B2
Method and system for diagnosing messages
Thomas Bierweiler, Karlsruhe (DE); Jean Pascal John, Munich (DE); and Daniel Labisch, Karlsruhe (DE)
Assigned to Siemens Aktiengesellschaft, Munich (DE)
Appl. No. 17/913,872
Filed by Siemens Aktiengesellschaft, Munich (DE)
PCT Filed Mar. 23, 2021, PCT No. PCT/EP2021/057393
§ 371(c)(1), (2) Date Sep. 23, 2022,
PCT Pub. No. WO2021/191190, PCT Pub. Date Sep. 30, 2021.
Claims priority of application No. 20165820 (EP), filed on Mar. 26, 2020.
Prior Publication US 2023/0341844 A1, Oct. 26, 2023
Int. Cl. G05B 23/02 (2006.01)
CPC G05B 23/024 (2013.01) 23 Claims
OG exemplary drawing
 
1. A method for diagnosing messages generated during operation of a technical plant, a process engineering process running within the plant being controlled via a process control system including a planning and engineering tool, an operator control and monitoring device and a plurality of automation devices, which are interconnected via a bus system for data communication, data sets, characterizing the operation of the technical plant, with values of process variables being recorded and stored in a data memory, diagnosis statements about the operation of the technical plant being determined via the data sets and at least one predetermined, self-organizing map, and n-tuples with predetermined values of process variables for an error-free operation of the technical plant corresponding to the data sets being stored at nodes of the self-organizing map, the method comprising:
determining, during operation of the technical plant, a smallest distance between data sets of a current time interval and data sets of nodes of the self-organizing map for a current time interval, within which a message has occurred following occurrence of the message, and selecting a corresponding node following occurrence of the message;
determining at least one current symptom to form differences from the data sets of the current time interval for a previously determined node during operation of the technical plant, only the differences of process variables which exceed a predetermined threshold value being considered;
issuing process variables involved in at least one previously determined symptom during operation of the technical plant; and
controlling the process engineering process via the process control system and implementing changes to the at least one predetermined, self-organizing map or predetermined threshold value during operation of the technical plant to ensure the error-free operation of the technical plant.