| 摘要 |
PURPOSE:To monitor always the state of remaining of trouble items or the like by adding a remaining display circuit and displaying whether object equipments of every slave station are left turned on or not and whether every item of the whole of a system is left turned on or not when a slave station selecting switch selects no slave stations. CONSTITUTION:Display signal items A-Z of a slave station 7 are stored temporarily in a reception storage circuit 10 after reception processing in a master station receiving circuit 3 and is outputted to a remaining display circuit 1 and a selection display circuit 2. The selection display circuit 2 displays out turn- on states of items A-Z of a pertinent slave station on item indicators 5 in accordance with the turn-on condition of a slave station selecting switch 4 and turns off the display output in accordance with the turn-off condition of the switch 4. Meanwhile, the remaining display circuit 1 operates OR among item display signals A-Z of each of slave stations 1-(n) and displays out results on slave station indicators 6. Thus, information, which indicates whether items are left turned on in each slave station or not, is always displayed on slave station indicators 6.
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