| 摘要 |
PROBLEM TO BE SOLVED: To make two monitor device have main/subordinate relation when two monitor device having two image display devices are installed in the control room of a building, and to make the subordinate monitor device substitute the function of the main monitor device when the main monitor device is down. SOLUTION: When the fire information signal of a fire sensor 12 is inputted through a fire receiver and the relevant monitor device, with which at least two of plural monitor devices 1 are installed at one spot, and it is to be functioned as main of the basis of the relation with the other monitor device, a link display control part 2a of this monitor device outputs a display command for displaying various operating buttons capable of inputting operation to a display screen control part 2b together with a display for displaying various disaster prevention symbols related to the entire plan of a floor, where a fire has occurred, and the fire on an image display device 3, and when this monitor device is to be functioned as subordinate one on the basis of the relation with the other monitor device, only the display command for displaying various disaster prevention symbols related to the previously defined figure of the building and the fire on the image display device is outputted to the display screen output part. Further, when it is judged the monitor device to be functioned as main one is abnormal, link is controlled so that this monitor device can be functioned as main device.
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