SEQUENCE CONTROLLER

PURPOSE:To easily perform the high-speed processing via hardware as well as easy change of a sequence by storing the state numbers in a state number memory counter for output of them to a memory circuit and having output of the control signal in accordance with the stored state number. CONSTITUTION:When an input signal received by an external input signal line, the signal which advances a state number memory counter 2 is outputted to a signal line 500 from an input signal selection circuit 1 and shifted to a state number 2. Here the signal which actuates a sequential counter 3 is outputted to a sequential counter control signal line 600 from a memory circuit 4. Then the counter 3 starts counting and the address designation is sequentially updated for the circuit 4. A signal is outputted to a signal line 700 from the circuit 4 after a fixed time passed and shifted to a state number 3. This action is repeated in a fixed cycle. Hereafter the state number of the counter 2 is advanced to the state number 4. This state number is inputted to the circuit 4 and the circuit 4 outputs a control signal CS4 to complete a sequence action.