Pipeline arithmetic unit, programmable logic controller, and execution method of pipelined processing

摘要

The pipeline arithmetic unit 110 includes an arithmetic unit 120 configured with a pipeline, a node monitoring unit 161 to acquire a node processing time, a queue monitoring unit 162 to acquire an accumulated message amount, a node processing time; A priority variable calculation unit 163 for calculating a priority variable of the node based on the amount of messages accumulated in the reception queue at the previous stage of the node, a time allocating unit for allocating operating time to each node according to the priority variable ( 164) is provided.