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Using soft-sensors in a programmable logic controller

A programming logic and soft sensor technology, applied in the direction of program control, program control, electrical program control, etc. in sequence/logic controllers, can solve problems such as complex, expensive, high development and customization costs

Active Publication Date: 2017-08-18
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, the implementation of higher-level software functions in supervisory control and data acquisition, manufacturing execution systems, or enterprise resource planning systems becomes complex and much more expensive
In turn, this results in high development and customization costs for these solutions

Method used

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  • Using soft-sensors in a programmable logic controller
  • Using soft-sensors in a programmable logic controller
  • Using soft-sensors in a programmable logic controller

Examples

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Embodiment Construction

[0022] Described herein are systems, methods, and apparatus generally related to intelligent programmable logic controllers (PLCs) capable of monitoring and utilizing values ​​associated with control level variables. These values ​​(referred to herein as "soft sensors") are consumed at the control layer in conventional systems. That is, they are typically not used at higher levels of the automation system. Also, in some instances, the accessibility and use of such soft sensors within the controller itself may be limited. However, using the techniques described herein, soft sensor values ​​can be captured during each scan cycle and used for further processing, such as generating data analysis or error analysis. The techniques described herein can be applied in various settings in which control systems are used, including, without limitation, industrial production environments.

[0023]Various embodiments of the invention are described in the context of a PLC that includes var...

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Abstract

A method of operating an intelligent programmable logic controller over a plurality of scan cycles includes the intelligent programmable logic controller selecting one or more softsensors available in a control program corresponding to a production unit, each soft-sensor comprising a local parameter or variable used by the control program. The intelligent programmable logic controller determines updated soft-sensor values corresponding to the one or more soft-sensors during each scan cycle and stores those values during each scan cycle on a non-volatile computer-readable storage medium operably coupled to the intelligent programmable logic controller. Additionally, the intelligent programmable logic controller annotates the updated soft-sensor values with automation system context information to generate contextualized data.

Description

technical field [0001] The present invention generally relates to the use of control layer data (referred to herein as "soft-sensors") in programmable logic controllers. The disclosed techniques can be applied to, for example, various automated production environments in which programmable controllers are used. Background technique [0002] A programmable logic controller (PLC) is a specialized computer control system configured to execute software that continuously gathers data about the state of input devices to control the state of output devices. A PLC typically includes three main components: a processor (which may include volatile memory), volatile memory including application programs, and one or more inputs / outputs (I / O) for connecting to other devices in the automation system. / O) port. [0003] PLCs are utilized in various industrial settings to control automation systems. Automated systems typically generate large amounts of data in their day-to-day operations....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/042G05B19/05
CPCG05B19/0423G05B19/054G05B2219/14055G05B2219/37537G05B19/056G05B2219/15108
Inventor 王凌云J.L.阿帕里乔奥赫亚J.罗斯卡G.罗
Owner SIEMENS AG
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