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Method for intercontroller communications in a safety instrumented system or a process control system

A technology for process control systems and process controllers, applied in general control systems, test/monitoring control systems, program control, etc., can solve problems such as poor efficiency and no communication between controllers

Active Publication Date: 2008-04-02
FISHER-ROSEMOUNT SYST INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the inter-controller communication process of existing systems may be inefficient or even non-existent at all

Method used

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  • Method for intercontroller communications in a safety instrumented system or a process control system
  • Method for intercontroller communications in a safety instrumented system or a process control system
  • Method for intercontroller communications in a safety instrumented system or a process control system

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Embodiment Construction

[0017] While the following text provides a detailed description of many different embodiments, it should be understood that the legal scope of this invention should be defined by the words of the claims set forth at the end of this patent. The detailed description should be construed as illustrative only, and does not describe every possible implementation - since every possible implementation would be impractical, if not impossible. Various alternatives may be implemented using current technology or using technology developed after the filing date of this patent, any such alternatives would still fall within the scope of the claims of this patent.

[0018] It should be understood that no limitation (whether express or implied) the meaning of the term other than its obvious or ordinary meaning, and the term should not be based on any statement in any part of this patent (other than the literal setting in the claims of this patent ) are construed as limiting the scope covered ...

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PUM

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Abstract

A system provided by the present invention provides a I / O card, which is used to connect two process controllers of a same communication line. The communication line is separated from a main communication line for connecting the two process controllers to a workstation. The process controllers can access the I / O card with the mode being similar to that accessing the I / O card of field devices. After this manner, the physical hardware as well as software structure is used for communication between controllers without alteration. The communication between controllers can be programmed as generalI / O communication.

Description

[0001] This patent is a continuation-in-part of U.S. Application Serial No. 10 / 352,396, filed January 28, 2003, the entire disclosure of which is hereby incorporated by reference this patent. technical field [0002] The present invention relates generally to process control systems for process plants that use input / output (I / O) devices to provide inter-controller communications. Background technique [0003] Process control systems—such as those used in chemical, petroleum, or other processes—typically include one or more process controllers communicating with at least one Host or operator workstation and communication link with one or more field devices. The field devices may be valves, valve positioners, switches, and transmitters (such as temperature sensors, pressure sensors, and flow rate sensors) that perform functions in the process equipment, such as opening or closing valves and measuring process parameters. Process controllers receive signals from process measur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418G05B9/03G05B23/02
CPCG05B2219/31348G05B19/41855G05B23/027Y02P90/02G05B19/4185
Inventor 加里·基斯·劳肯特·阿兰·伯尔戈弗雷·R·谢里夫
Owner FISHER-ROSEMOUNT SYST INC
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