| 摘要 |
PURPOSE:To decrease a computer load and to attain the supervision with a real time by executing a PIO condition supervision and setting a simulation with one CRT. CONSTITUTION:When respective programs fetch a plant condition into an input output logical number (LNO) unit set for a PIO signal and operate facilities, the PIO signal is inputted by issuing as OS macro instruction. When a PIO input/output result is received from OS and displayed and requested to a CRT at the supervising processing, the PIO signal while the presence and absence of a condition change at an LNO unit and a present CRT are displayed executes the table control, the number of times of displaying is reduced by executing the CRT displaying request and the computer load is also decreased. At the displaying processing side, the PIO information fort one page is not always displayed, picture coordinates on the CRT are table-controlled at an LNO unit during the displaying, and only the PIO information, in which a condition change occurs, is partially displayed. Thus, the increase in the omission and time lag of information can be prevented by the PIO signal supervision of the number of many points. |
