P0916DB FOXBORO

FOXBORO FCM2F2
FOXBORO P0916FH
FOXBORO FBM241C
FOXBORO FCM2F2
FOXBORO FBM215
FOXBORO FEM100

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Description

PLCCPU内有指示程序步存储地址的程序计数器,在程序运行过程中,每执行一步该计数器自动加1,程序从起始步(步序号为零)起依次执行到最终步(通常为END指令),然后再返回起始步循环运算。PLC每完成一次循环操作所需的时间称为一个扫描周期。

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