MVME162 -220 MOTOROLA 网络读写通信

MOTOROLA MVME162- -512A
MOTOROLA MYME162- 522h
MOTOROLA MYME162- 522A 01 -W3960B/61C
MOTOROLA MVME162PA
MOTOROLA MYME162PA-344
MOTOROLA MVME167-33B
MOTOROLA MVME172- -263/260
MOTOROLA MVME2301 -900
MOTOROLA MVMB2604 712I/0
MOTOROLA MVME300
MOTOROLA MVME5100
MOTOROLA MVME5500
MOT0R0LA MVME712M
MOTOROLA VME162P A344SE
MOTOROLA XVME-674
MOTOROLA XVME-957

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描述

S7-200 CPU之间的PPI网络通信只需要两条简单的指令,它们是网络读(NetR)和网络写(NetW)指令。在网络读写通信中,只有主站需要调用NetR/NetW指令,从站只需编程处理数据缓冲区(取用或准备数据)。PPI网络上的所有站点都应当有各自不同的网络地址。否则通信不会正常进行。

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