MICROPROCESSOR SYSTEM FOR CONTROL OF MANUFACTURING PROCESSES Russian patent published in 1994 - IPC

FIELD: automation and control. SUBSTANCE: microprocessor system has control unit, address register, instruction memory, two flip-flops, encoder, six 2 AND gates, counter, inverter, two delay lines, three 2 NAND gates, two differentiating circuits, double decoder, seven registers, 3 AND gate, two channel transmitters, buffer transceiver, interface unit, digital display, unit of keyboard for address and data control. Device provides several modes. "Correction" mode serves for modification of control program and has three stages, i. e. setting address of modified location in instruction memory, setting new data, recording new data. "Step-by-step execution of instructions" mode serves for debug of corrected parts of program and provides execution of on instruction per each step. Execution is controlled by press of "S" button. "Automatic execution of instructions" mode serves for continuous control of manufacturing process according to control program which is recorded and stored in memory of instructions. After switching to "Correction" mode, control unit interrupts program execution and switches to "Step-by-step" mode. In this case control unit is isolated by buffer transceiver from address bus which is used for transmission of address and modified data. When correction ends processing of modified program can be continued in modes "Step-by-step" and "Automatic-Execution" by switch of mode setting switch into corresponding state. EFFECT: increased field of application, facilitated debugging and use. 1 dwg