| 摘要 |
<p>PROBLEM TO BE SOLVED: To easily check whether an input signal is being disconnected or not on a monitoring screen in a process control device for converting an input signal from a plant into an industrial unit scale and displaying the converted scale on the monitoring screen. SOLUTION: In this process control device, it is easily check that an input value is in a disconnected state by inversely displaying a display value when the input value is disconnected from the display value. Even when the input value is disconnected due to a problem generated on the process side, a trouble that the reset of the input value is forgotten and not noticed until the occurrence of actual damage in the plant can be prevented.</p> |
