PROGRAMMED DIGITAL SEQUENCE CONTROLLER

摘要

A digital control apparatus, for performing the control according to programs selected according to the kind of controlled object, comprising a plurality of read only memories each storing at least one program; wherein required contents are selectively read from the program stored in the first one of the plurality of read only memories, so that an output signal is produced on completion of reading so as to terminate the operation of a program counter attached to the first read only memory; immediately after the termination of the operation of the program counter, the selection and reading of required contents from the program stored in the second read only memory begins; and required contents are thus successively read from the programs stored in the other read only memories in turn in a predetermined order.