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An Automatic-Controller Description Language
January 1980 (vol. 6 no. 1)
pp. 53-64
H. Takahashi, Department of Mathematics, College of Science and Engineering, Nihon University
This paper proposes a control-oriented Algol-like nonprocedural language called Condor. Automatic controller theory, in company with computer science, underlies many industrial fields. Sequential control is especially important. So far, sequential-controller description methods have by and large been lmited to graphic ones, which are unreadable in the case of large controllers. A higher-level linguistic approach has been considered unlikely. This paper proposes a language widely suitable for controller architecture description. A controller, in its nature, consists of many subsystems which work in a parallel manner, interacting with one another. This paper deems that a basic component is not a process, but a response. A controller is considered to be a responding system in which every reactor works together, having a relation and communication to one another. A Condor program is a role assignment list for the reactors; it is Algol-like and nonprocedural. All the statements work at all times, interacting with one another.
Index Terms:
sequential control, Automatic control, automation, control system description language, hierarchy, logic system design automation, nonprocedural language, parallel action, programmable logic controller, relay circuit
Citation:
H. Takahashi, "An Automatic-Controller Description Language," IEEE Transactions on Software Engineering, vol. 6, no. 1, pp. 53-64, Jan. 1980, doi:10.1109/TSE.1980.230463
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