Invention Grant
- Patent Title: System and method of communicating safety data over high availability industrial control systems
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Application No.: US17515265Application Date: 2021-10-29
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Publication No.: US11927950B2Publication Date: 2024-03-12
- Inventor: Nicholas L. Stay , Anthony G. Gibart , Mark A. Flood , Chandresh R. Chaudhari , Chad J. Bohl , Sivaram Balasubramanian
- Applicant: Rockwell Automation Technologies, Inc.
- Applicant Address: US OH Mayfield Heights
- Assignee: Rockwell Automation Technologies, Inc.
- Current Assignee: Rockwell Automation Technologies, Inc.
- Current Assignee Address: US OH Mayfield Heights
- Agency: Boyle Fredrickson, S.C.
- Main IPC: G06F11/00
- IPC: G06F11/00 ; G05B19/418 ; G05B23/02

Abstract:
A system for communicating between redundant devices balances the desired attributes of a high availability (HA) control system and a safety control system. The system includes concurrent connections as a fault tolerant mechanism for industrial protocol connections at the transport layer. The concurrent connections establish multiple paths for redundancy from a data producer to a data consumer. Concurrent connections increase availability of the HA control and safety instrumented systems. More specifically, concurrent connections and architectural redundancies eliminate a single point of failure within the control system and further reduce safety connection timeouts during fault detection and/or recovery. Concurrent connections may be used to keep a HA system operational or to provide detection of a failure in a safety system. The industrial control network may be configured to function as a HA control system, as a safety control system, or with certain degrees of both HA and safety-related operation.
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