Honeywell International Inc.

Uop Lcc

Gary Drayton

Paul Francis McLaughlin

Alexander Chernoguzov

James Michael Schreder

Norman Raymond Swanson

Christopher Pulini

Raj L Bandekar

Michael James Waynick

Christopher Buonacuore

William Russell Massey, Jr

A method for use by a first device associated with a redundant second device includes issuing a synchronization request to a file system of the first device. The file system is configured to cache changes associated with a memory space of an application, the synchronization request causing the file system to send the cached changes to a driver of the first device The driver is used to commit the cached changes to a copy of the memory space of the application in order to cause the copy of the memory space of the application to match the memory space of the application. One or more changes made to the copy of the memory space of the application caused by committing the cached changes are identified. A change set identifying the one or more changes being made to the copy of the memory space of the application is created in a buffer and the change set transmitted from the buffer to the second device in order to synchronize an additional copy of the memory space of the application at the second device.

Apparatus and method for implementing process control redundancy using operating system (OS) file system support

A method in an industrial process control and remote engineering system comprises receiving, by a remote control system, a control configuration, interfacing, by the remote control system, via a network, with at least one process equipment, and remotely controlling, by the remote control system, the at least one process equipment according to the control configuration. In some embodiments of the method, the remote control system is a twin of a local control system.

Cloud based control for remote engineering

A redundant process controller arrangement includes a primary controller and parallel connected secondary controller each coupled to actuators and sensors coupled to processing equipment. The primary and secondary controllers include a main writable memory including a cache data control algorithm, central processing unit (CPU) with cache memory including cache not supporting write-thru, tracker logic coupled to a control cycle database in a tracked memory region and to a primary tracking buffer. A redundancy link is between the CPUs for passing tracked changes. The algorithm implements memory tracking using copy-back including the primary tracker logic each cycle writing tracked changes into the primary tracking buffer, and at cycle end, transferring tracked changes from the primary tracking buffer to the secondary controller over the redundancy link, and writing tracked changes to the secondary control database.

Memory tracking using copy-back cache for 1:1 device redundancy

A method includes transitioning a device in an industrial process control and automation system from a secondary role to a primary role during a switchover and, in response to the switchover, clearing one or more security values stored by the device. The method also includes receiving a message at the device from a network node and, in response to determining that no security association is associated with the received message or the network node, exchanging security credentials and establishing a trust relationship with the network node. Transitioning the device includes assuming a network address of another device that previously operated in the primary role, that previously communicated with the network node, and that previously had a security association with the network node. Clearing the security value(s) can prevent the device from having the trust relationship associated with the network node when the device receives the message from the network node.

Apparatus and method for establishing secure communication with redundant device after switchover

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King of Prussia, PA, United States of America

Gary Drayton