| 摘要 |
<p>PURPOSE:To prevent the loss of data due to a mistake of an operator or the like. CONSTITUTION:A data collecting means 3 stores inputted process data based on collection input points and display data which are stored in a data display point storage file 8, and a data display means 4 displays the transition of process data stored in a display data storage file 9 on a display means 7, and an item register means 8 registers contents of the data display point storage file 8. A preserved data discriminating means 11 stores process data at registered collection input points including collection input points, which are temporarily regiestered in the data display point storage file 8 and are deleted, in a preserved data storage file 12 and discriminates whether deleted collection input points are registered again or not, and, if they are registered again, corresponding preserved collected data is extracted from the preserved data storage file 12 and is stored in the display data storage file 9.</p> |
