| 摘要 |
<p>PURPOSE:To easily know the condition of a specific relay or the relation between the other relay by receiving forced information from a programmable controller, and converting the forced information into a display symbol for a chart expression. CONSTITUTION:The forced information to indicate whether or not the specific relay is forcibly altered and the condition of forced alteration is received from the programmable controller by a receiving means 100. The forced information is altered to the display symbol for the graphical expression by a display control means 200. Thus, the forced information can be displayed in a sequence program graphically displayed to a display means 300, and the condition of the specific relay or the relation between the other relay can be easily known. Further, even when the sequence program is altered, the forced alteration of the condition of the specific relay due to a malfunction can be prevented.</p> |
