Design of Safety PLC Execution Unit Based on Redundancy Structure of Heterogeneous Dual-Processor

Traditional PLC system in the event of system failure, there is no perfect mechanism to ensure the safety of control, the safety PLC based on heterogeneous dual-processor redundant structure can meet the requirements of industrial control for equipment and personnel, improve the reliability of industrial control. In this paper, according to the operation requirements of safety PLC based on heterogeneous dual-processor redundancy structure, the safety PLC execution unit executes the executable code generated in the compilation unit and outputs the output signal to the control device, completing the operation and safety control of external instruments and other external components according to the logic instructions designed by the users.