| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent inappropriate data from being inputted to process input/output devices in spite of non-coincidence of ID codes set in doubled interface devices. <P>SOLUTION: An interface device 11 is provided with a station address setting switch 16 and a comparator circuit 12 that compares station addresses set in interface devices 11 and 21. There are further provided a transmission/reception control circuit 15 that transmits to process input/output devices 30A to 30N data received by the interface device 11 from a central arithmetic processing unit, an output circuit 14 that causes coincident station addresses to be stored in a memory circuit 13 and at the same time performs control to cause data to be inputted to the process input/output devices 30A to 30N or, if the station addresses are not coincident, to cause data not to be inputted to the process input/output devices 30A to 30N, and a non-coincidence display 17 that notifies non-coincidence if the station addresses are not coincident. <P>COPYRIGHT: (C)2012,JPO&INPIT |
