| 摘要 |
PURPOSE:To set up and change easily priority by determining the priority of interruption requests in accordance with the size of the priority set points preset from a priority setter in a check pulse counter. CONSTITUTION:A multiple prior interruption control circuit in a unit controller for process I/O units is constituted of flip-flops 6', 6'', one-shot circuits 7, 7' a check pulse generator 8, a check pulse counter 9, a priority setter 10, etc. The priority of interruption requests to respective process I/O units is simply determined by the size of priority set points preset from the setter 10 in the check pulse counters. |
