| 摘要 |
PROBLEM TO BE SOLVED: To execute plant monitoring control without interruption at the time of an accident of loss of all power supply or the like.SOLUTION: A plant monitoring control system includes: a plurality of control devices 2-1 comprising an external signal input/output section 8 for inputting/outputting a power supply voltage and process state signals 33-1 through 33-n from/to multiple monitoring control object apparatuses 3-1 through 3-n consisting of a plurality of types, a power supply device 6, a power supply abnormality monitoring section 9 for detecting abnormality of the power supply device 6, a control device arithmetic section 7, an abnormal time change-over section 10 that is provided between the control device arithmetic section 7 and the external signal input/output section 8 and has a plurality of change-over switches, a first terminal selection section 11a for outputting the power supply voltage to the predetermined monitoring control object apparatuses via the plurality of change-over switches and a second terminal selection section 10b for inputting the predetermined process state signals via the change-over switches; and a portable terminal device 12 comprising a type input section 13 for inputting types of the monitoring control object apparatuses 3-1 through 3-n, a type selection section 14, a power supply generation section 15 and a backup monitoring control section 16. |
