Methods and apparatus to upgrade and provide control redundancy in process plants
OwnerDavid Mark Smith, Brandon Hieb +4inventors
InventorsDavid Mark Smith, Brandon Hieb, David R. Denison, Godfrey R. Sherriff, Gary Law, Kyle Tetmeyer
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Abstract
Methods and apparatus to upgrade and provide control redundancy in process plants are disclosed. An example disclosed method to upgrade software for a control device of a process control system comprises instantiating a replacement component of the software, copying state data from an existing component to the replacement component, and changing the replacement component to an active mode when a first state of the replacement component matches a second state of the existing component.
Claims49
A method to upgrade software for a control device of a process control system, the method comprising:
- instantiating a replacement component of the software;
- copying state data from an existing component to the replacement component;
- and
- changing the replacement component to an active mode when a first state of the replacement component matches a second state of the existing component.
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An article of manufacture storing machine readable instructions which, when executed, cause a machine to upgrade software for a control device of a process control system by:
- instantiating a replacement component of the software;
- copying state data from an existing component to the replacement component;
- and
- changing the replacement component to an active mode when a first state of the replacement component matches a second state of the existing component.
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A method to provide control redundancy for a process plant control system, the method comprising:
- providing a control input to a first instance of control software sub-system and to a second instance of the control software sub-system, the first and second instances to process the control input substantially in parallel;
- and
- providing either an output of the first instance or an output of the second instance to a process plant field device.
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An article of manufacture storing machine readable instructions which, when executed, cause a machine to provide control redundancy for a process plant control system by:
- providing a control input to a first instance of control software sub-system and to a second instance of the control software sub-system, the first and second instances to process the control input substantially in parallel;
- and
- providing either an output of the first instance or an output of the second instance to a process plant field device.
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Dependencies are inferred from the claim text.