| 摘要 |
<p>PURPOSE:To surely detect an erroneous output generated between read-out periods and an erroneous output to other output number than the designated one by detecting a variation of output information at every one scan, and displaying this variation point on a display device. CONSTITUTION:In the inside of a verifying device 20, output information to be verified is inputted as an initial value to a previous output information store area 31 at every one step, the processing of one scan is executed, and the contents of an obtained output information area 13 are read out and stored in a present output information store area 32 of the verifying device 20. Subsequently, exclusive OR of the previous output information of the previous output information store area 31 and the present output state of the present output information store area 32 is taken. Thereafter, this result is decided, and when it is other than '0', it is decided that the output information is varied, and the number which causes this variation is displayed on a CRT device 27. In such a way, an erroneous output generated between read-out and read-out, and an erroneous output of other output number than the set one can be detected surely.</p> |
