COMMAND PROCESSING METHOD OF PLC

摘要

The method for improving the processing velocity of programable logic controller (PLC) comprises the following steps of: discriminating whether the instruction code is inputted or not through the data buffer; interpreting the instruction code; discriminating whether the intervention demand instruction of CPU is included or not; increasing the program counter by one if the intervention demand instruction is not included, followed by returning to the previous stage; discriminating whether the instruction code of the third stage is processed; outputting the processed result of program; generating the interrupt to the CPU if the instruction code of the third stage is not processed.