PROGRAMMABLE CONTROLLER AND ITS PROGRAMMING METHOD

PURPOSE: To improve the degree of freedom and versatility against a control content by giving latest input pattern data to a high speed processing memory, reading corresponding output pattern data and driving an output device when the execution condition of a specified high speed processing instruction is realized. CONSTITUTION: Pattern data showing the relation of an input pattern and an output pattern is written into EPROM 6 as the high speed processing memory. A signal from outside is inputted to a receiver 7 and a driver 8 outputs a read content from EPROM 6 to outside. A signal from an input buffer 3 and a signal from the receiver 7 are impressed on an address bus 9. When the state of an external input device or that of the internal device of a PC main body unit 1 is inputted to the respective bits of the address bus 9, and the content of EPROM 6 is read, one bit pattern is outputted from a data bus 10 in accordance with the state of the device. The respective bits of the data bus 10 are outputted to one of output devices.