廈門市泰尼電器有限公司
主營產品: AB模塊PLC |
廈門市泰尼電器有限公司
主營產品: AB模塊PLC |
參考價 | 面議 |
【IC697ALG440】【IC697ALG440】
【】【】
(1)初始狀態。初始狀態是功能圖運行的起點,一個控制系統至少要有一個初始狀態。初始狀態的圖形符號為雙線的矩形框,如圖2(a)所示。在實際使用時,有時也是畫單線矩形框,有時畫一條橫線表示功能圖的開始。
:張亮(工程師) 專線:
24小時移動專線: 【】
(2)工作狀態。工作狀態是控制系統正常運行時的狀態,如圖2(b)所示。根據系統是否運行,狀態可分為動態和靜態兩種。動狀態是指當前正在運行的狀態,靜狀態是沒有運行的狀態。不管控制程序中包括多少個工作狀態,在一個狀態序列中同一時刻zui多只有一個工作狀態在運行中,即該狀態被激活。
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Schweitzer Engineering Laboratories SEL-321-1
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