Method and a system for controlling a process device

Details Method and a system for controlling a process device Method and a system for controlling a process device

2007-08-07

2009-12-22

Patel, Ramesh B (Department: 2121)

Data processing: generic control systems or specific application

Generic control system, apparatus or process

Having protection or reliability feature

C700S001000, C700S012000, C700S021000, C700S080000, C714S024000, C714S025000, C714S026000, C701S045000

Reexamination Certificate

active

07636606

ABSTRACT:
The present invention relates to a method for process control, wherein at least one process device to be controlled is controlled by at least one process module and at least one safety module in that process signals of the process module not relevant to safety and safety signals of the safety module relating to process safety are logically linked to one another and at least one local safety signal of a local safety sensor is supplied directly to at least one control output of a local control unit associated with the process device while bypassing this logical linking operation in order to effect a fast change in state at the process device to be controlled which is connected to the control output, wherein the fast switching path includes a fast switching function with which the result of the logical linking operation and the local safety signal are evaluated together and wherein a fast change in state at the process device to be controlled effected via the fast changing path is changed again, and is in particular reversed again, when the common evaluation produces a predetermined result. The invention moreover relates to a system for process control, in particular for the carrying out of the method in accordance with the invention.

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European Search Report dated Feb. 5, 2007 relating to European Patent Application No. 06 016 718.6; 4 pages.
Translation of European Search Report dated Feb. 5, 2007 relating to European Patent Application No. 06 016 718.6; 3 pages.

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