Allen-bradley Company, LLC

Terry L Dauterman

Ronald Edwin Schultz

David R Rohn

A programmable controller stores a user control program which is comprised of a plurality of conventional ladder programs and a structure chart program. A microprocessor executes a structure chart interpreter routine to interpret the structure chart program and to thereby create an active state list which indicates the ladder programs that are to be executed. The same microprocessor with the assistance of a bit processor also executes the ladder programs which are indicated on the active state list to control a machine connected to the programmable controller.

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Chardon, OH, United States of America

Terry L Dauterman