| 摘要 |
PROBLEM TO BE SOLVED: To represent operating conditions of the apparatuses of a plurality of facilities in a limited panel space by providing a controller, which controls the changeover of a plurality of marklets and lighting of indicators. SOLUTION: A marklet-type graphic panel 1 is constituted of marklets 1a which have a plurality of patterns which can be changed over electrically, indicators 1b which indicate conditions such as operation, stops, failures, etc., of field apparatuses 5, and changeover of the marklets 1a and the indication of the indicators 1b are controlled by a controller 3. Then a marklet 1a can be changed over to a plurality of patterns, through a signal obtained by a panel changeover switch 4 is received by the controller 3, and transmitted to the marklet 1a through a transmission line 6. In addition, the indication of the indicators 1b is also transmitted to the indicators 1b, similarly through the transmission line 6. Consequently, it becomes possible to represent a plurality of facilities in a limited panel, and to monitor the operating conditions of apparatuses which correspond to the facilities.
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