| 摘要 |
<p>PROBLEM TO BE SOLVED: To omit electric wiring and to gather data fast by providing a logging data gathering means which records the display state of a display means displaying the control data execution state of a control means. SOLUTION: The logging device 11 obtains image information corresponding to the control information of a PLC 13 from a CCD camera 14 and records and reproduces the image information. When reproduction is requested, the obtained image information is displayed out on a display 15. The PLC 13 controls the all operation of the object facilities 12 which are monitored and the control data of the PLC 13 having controlled object facilitates 12 which are monitored are led as logging data to the logging device 11 and logged. At this time, when the logging data of the PLC 13 are gathered at the logging device 11, they are gathered through not a leased communication wire, but optical communication. The control data execution state of the PLC can be gathered fast at a remote place by being displayed like a light signal, so the data can be recorded at a high speed irrelevantly to the manufacturer and kind of the PLC.</p> |
