Design of Industrial Instrument Manipulator

摘要

In view of the process control system in the system operation, maintenance and repair of special circumstances, an instrument manipulator is designed for back-up operation which consists of microcontroller, A/D converter, D/A converter, graphic dot matrix liquid crystal and optical couplers etc. Analog quantity input mainly records 4~20mA current signal, analog quantity output by the D/A outputs 1~5V, then converts to 4~20mA current signal to control the valves. Switch quantity input and output achieve by the shift register and the relay. All input and output changes are storage and record.