| 摘要 |
<P>PROBLEM TO BE SOLVED: To make dispensable physical rewiring work on a distribution board even if a ladder program is altered or any such problem arises. <P>SOLUTION: A system comprises a distribution board 2 that is provided with a plurality of connection terminals 2a to 2d for use in wiring of input/output units 1a to 1d and further has a power line communication function, a PLC 10 that executes a ladder program to perform, to and from the distribution board 2, power line communication of signals to the input/output units, and a personal computer 11 that downloads the ladder program to the PLC 10, wherein the personal computer 11, when the ladder program is altered, defines the wiring of the input/output units 1a to 1d to the connection terminals 2a to 2d of the distribution board 2 correspondingly to the alteration of the ladder program without any change in physical input/output wiring. <P>COPYRIGHT: (C)2012,JPO&INPIT |
