Method for the event-controlled retrieval of process data

Abstract

A method according to the invention provides for event-controlled retrieval of process data by using a publish-subscribe service, for example MQTT, and with the participation of a message broker. Forthe retrieval according to the invention, retrieval of a multiplicity of process data reserved in a distributed manner in the form of response messages can be carried out by a single request message.Advantageously, it permits the method according to the invention to implement a dynamic data request, in which new response messages to a request message are transmitted when changes in the process data provided or stored result. A data retrieval component transmitting the request message needs neither details about the request modalities of data-providing components nor knowledge or direct references to currently available data-providing components. The method thus permits dynamic, event-controlled retrieval of object data in a decentralised IoT environment, in which heterogenous system components produce, store and process data in different ways.

Description

technical field [0001] The invention relates to a method for event-controlled invocation of process data, in particular for invocation of process data using a message broker configured for a publish / subscribe service. Background technique [0002] In general, the present disclosure relates to invocation of process data in process facilities and process control systems, eg, for real-time performance monitoring and analysis of real-time data generated by process facilities and process control systems. Such calls to process data are used, for example, in the field of industrial automation technology, in production machines or machine tools, in diagnostic or service assistance systems and in the operation of complex components, plants and systems, especially industrial or medical facilities and under maintenance. [0003] The current industrial working environment is characterized by decentralized data storage in different distributed system components, in particular in so-call...

AI Technical Summary

Problems solved by technology

[0007] A growing problem with the methods currently used for invoking process data is that, on the part of the data invocation component, it is often necessary to make multiple invocations of multiple separate— — and uncoordinated — data-providing components

[0008] is also disadvantageous that the current limitation is that the initiative of data query must come from the data calling component and cannot e.g. or there is a change in specific process data - to trigger

[0009] Finally, the current methods for invoking process data are limited by the fact that in the data invoking component, a corresponding Query Interface - Query Application Programming Interface (QueryApplication Programming Interface) or Query API to be able to call process data from respectively different data providing components

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