The Dow Chemical Company

Dow Global Technolgoies LLC

John L Clement

Edward R Sederlund

Robert J Lindesmith

Johannes C Kanse

Eloy Baca, Jr

Augustine Tibazarwa

Donald Grinwis

Dennis J Dunlap

Brent M Frank

Ernst W Quelle

Helmut A Bezecny

A process control system receiving input signals from a controlled apparatus and using the input signals in determining at least one output signal modifying the characteristics of at least one respective control device in the controlled apparatus where the source code for the general control of the apparatus and the source code for the safety shutdown system of the apparatus are compiled to control code in a unified compilation.

Process control system with integrated safety control system

A graphics display system including one or more display panels having a plurality of lights, a graphics panel data processor including at least one microprocessor, logic for establishing a correspondence between the process variables and selected lights, logic for determining the current state of each of the process variables and transmitting a signal to the corresponding light(s) on the panel to activate the light depending on the current state of the corresponding process variable, and communication means for rapid periodic communication of the process variable data from a process control computer utilizing the graphics display system to each of the panels in the system.

Programmable graphics panel

Growing community of inventors

Midland, MI, United States of America

John L Clement