FM233 FOXBORO

FOXBORO FBM211
FOXBORO F0XBORO FBM242
FOXBORO FBM224
FOXBORO FBM206
FOXBORO FBM219
FOXBORO FBM237

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Description

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。不同型号的PLC,循环扫描周期在1微秒到几十微秒之间。PLC用梯形图编程,在解算逻辑方面,表现出快速的优点,在微秒量级


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