| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a display method in which data, on a power-factor meter, to be input to a process control device is displayed, with good efficiency, on a display control device in a control system which is composed of the display control device connected via a LAN, of a process control device and of an engineering device. SOLUTION: Display condition data which expresses the kind of a power- factor meter is transmitted from an engineering device (F30), and a DC current value which expresses a power factor to be output by the power-factor meter is transmitted to a display control device from a process control device (F20). The display control device extracts data on a power factor of 1 (F12), it discriminates whether the power factor is advanced or delayed (F13), it creates display data on a delayed power factor, display data on an advanced power factor and display data on the power factor of 1 (F14 to F19 excluding F16), and a power factor based on the display data is displayed (F16).</p> |
