JPS5574603A - Sequence controller - Google Patents

Abstract

PURPOSE: To enable to handle the number of points more than input and output number of points without reduction in the operation instructions, by arbitrarily selecting the input and ouput information tables provided one or more with the table selection instruction.

CONSTITUTION: In the input fetch processing, the input section 1 and the input information table 2 are selected with the selection signal s from the selection circuit 8, and the input information of the designated address from the input section 1 is stored in the address corresponding to the table 2. Next, in the extensive input fetch processing, the extension input section 100 and the extensive input information table 200 are selected with the selection signal s₂ from the circuit 8 and the information at the input section 100 is stored in the table 200. Further, the sequence instruction stored in the memory section 5 is read out, operation processing is executed, the output information in the output information table 4 is written in the address corresponding to the output section 3, and the output information in the extensive output information in the extensive output information table 400 is written in the extensive output section 300. Thus, the number of points more than the input and output number of points can be handled without the reduction in the operation instruction.

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