Step control system
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5-2-090
A system in which the manipulated variable assumes discrete predetermined values.
Note:: The condition for change from one predetermined value to another is often a function of the value of the actuating signal. When the number of values of the manipulated variable is two it is called a two-step control system, when more than two, a multi-step control system.
Reference: ANSI
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
