Sick Ag

Irina Hippenmeyer

Franz Dold

Craig Kendall

Jim O'Laughlin

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.

Method and a system for controlling a process device

The 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 by at least one safety module, in that process signals not relevant to safety are transmitted to a local control unit associated with the process device by the process module and safety signals relating to the process safety are transmitted by the safety module, wherein the process signals and the safety signals are logically linked to one another in the control unit and the result of the logical link is made available at a control output of the control unit to which the process device to be controlled is connected. 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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March, Germany

Irina Hippenmeyer