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US 8,280,530 B2Granted
Plant control system
AssigneeYokogawa Electric Corporation
InventorNoriko Kase
Life of this patent
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Abstract
A plant control system includes: an engineering apparatus for defining change information so as to change definition information about the system; and a control apparatus for referring to the change information downloaded from the engineering apparatus to set an output value of a field device. The control apparatus includes a locking part for inhibiting setting of the output value of the field device.
Claims6
A plant control system comprising:
- an engineering apparatus for defining change information so as to change definition information about the system;
- and
- a control apparatus for referring to the change information downloaded from the engineering apparatus to set an output value of a field device,
- wherein the control apparatus comprises a locking part for inhibiting setting of the output value of the field device, and
- wherein the control apparatus and the field device comprise a tracking communication part for referring to the change information and checking a present value of a change destination to perform tracking.
2 more elements
Dependencies are inferred from the claim text.