選擇器1步進模式:這個定值定度選擇器的運行模式。當設(shè)為“超時”,選擇器將會在一段預(yù)定休止狀態(tài)后改變其位置。改變是自動的并且不需要任何外在的改變選擇器的位置的確認。當設(shè)為。“應(yīng)答”，只在通過一個獨立的確認信號確定更改位置的意圖后，選擇器才會改變其位置。

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