| 摘要 |
<p>PURPOSE: To effectively store error information and event information in the same hardware. CONSTITUTION: A main control part 2 executes control arithmetic processing according to a program, a main memory part 3 stores various kinds of process data or programs and a process input/output part 4 fetches the process data from a plant and outputs operation data for which the control arithmetic processing is performed by the main control part 2 to the plant. An error/event information storage memory part 10 is a memory constituted of a RAM or the like for storing the error information together with the event information as systems, and is provided with plural block areas having prescribed areas for storing plural pieces of information as an information storage area 11. The information storage area 11 has an error information storage bit map area 12 and an error information storage block number area 13.</p> |
