| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an analog upper and lower limit monitor system capable of preventing an alarm output due to any upper and lower limit monitor abnormality at the time of rising or falling of equipment. SOLUTION: This analog upper and lower limit monitoring device is constituted of an inputting function 71 for inputting various digital signals and analog signals such as the state of equipment, the state of a measured value, and the operating state of a load, an equipment state judging function 73 for inputting an output signal from the inputting function 71 and judging the state of the equipment, an upper and lower limit monitor setting function 74 for changing an upper limit monitor set value and a lower limit monitor set value according to the state of the equipment, an analog upper and lower limit monitoring function 72 for monitoring the upper and lower limits corresponding to the state of the equipment based on the inputs from the inputting function 71, the equipment state judging function 73 and the upper and lower limit monitor setting function 74 and an alarm outputting function 75 for outputting an alarm when any abnormality is generated by the analog upper and lower limit monitoring function 72. Thus, an unnecessary alarm output at the time of rising or falling of the equipment can be prevented.</p> |
