| 摘要 |
<P>PROBLEM TO BE SOLVED: To increase the speed of a signal transmission bus in a programmable controller even if the number of input/output units is increased. <P>SOLUTION: This method comprises; a step to allocate sub CPU units 12 and 13 for each of a prescribed number of slots of an extending direction of a signal transmission bus from a main CPU unit 11; a step in which each of the CPU units 11, 12, and 13 performs division execution of a ladder program and sequentially communicates with a CPU unit at a next stage; and a step in which each of the CPU units 11, 12, and 13 performs input/output of a signal for division execution of the ladder program from/to input/output units 18, 20, and 22 which the CPU units themselves manage. <P>COPYRIGHT: (C)2012,JPO&INPIT |
