品牌:福克斯波羅 | 規格:FBM242 P0916FJ | 材質:FBM242 P0916FJ |
產地:美國 |
FBM242P0916FJ
FBM242P0916FJ
FBM242P0916FJ
PI(Point-to-Point)協議,即點到點接口協議。PPI是一個主/從協議,主站(其它CPU或SIMATIC編程器)給從站發送申請,從站進行響應。從站不初始化信息,只響應主站的申請或查詢。如果在用戶程序中允許PPI主站模式,S7-200 CPU在RUN模式下可以作為主站,還可以利用網絡讀(NETR)和網絡寫(NETW)指令讀寫其他CPU,同時也能夠作為從站響應來自其它主站的申請。採用PPI協議的網絡中多只能有32個主站。該協議主要是用來編程、PPI組網等
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