| 摘要 |
<p>PROBLEM TO BE SOLVED: To accurately restore RAS information without making a history memory area large. SOLUTION: Relating to this display device, a PC(programmable controller) 1 is provided with a 1st memory 13 which stores current RAS(reliability, availability, and security) in sequence, a 2nd memory which stores reference base RAS, a comparing device 15 which compares the current RAS with the base RAS sequentially, and a 3rd memory 16 which stores only discrepant current RAS and the display device reads data out of the memories 13 and 14 by a support tool 2 and composes and displays RAS history information.</p> |
