| 摘要 |
<p>PURPOSE:To select pictures on a large-picture data display device by outputting the picture number corresponding to the large picture priority request signal having the highest priority never to a display picture control means at the time of input of the large picture priority request signal. CONSTITUTION:A large picture expansion priority request means 11 is provided in a plant data display device 31, and an operator outputs a large picture priority request signal (x) to a large picture priority switching control means 12, and the large picture priority request signal (x) having the highest priority level is accepted; and after it is accepted, priority is given to the large picture priority request signal (x) from the corresponding plant data display device 31 until it is released by the large picture expansion priority request means 11. While the large picture priority request signal (x) is inputted from the #N plant data display device 31 by operator's selection, the large picture priority switching control means 12 accepts a picture number (u) inputted from a large picture expansion control means 9 of this #N plant data display device 31 in preference to picture numbers (u) from the other plant data display devices 31.</p> |
