| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve a problem that there is a function, in a DI module, for eliminating noise superimposed on a contact input signal but it can not be known how much noise is superimposed, so that it is not possible to discover, in early stages, noise that increases gradually with equipment aging or environmental variations. <P>SOLUTION: This device includes an input value change counter that counts a change of the contact input signal, and an input fixed value change counter that counts a change in a fixed value of the contact input signal and if the difference between count values of the input fixed value change counter and the input value change counter exceeds a setting value, a caution message is outputted, thereby knowing how much noise is superimposed on the contact input signal. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
