MHD112B-058-PG0-LN R911276733 REXROTH

SAM-DA-400/480-07N-P5N-E
EDS-408A-MM-SC
IC698PSA100D
ATV31CU22N4
JD63F400
P0926CP ZCP270
6ES7133-1BL10-0XB0
ESM02.3-FW FWA-ECODR3-FGP-02VRS-MS
A06B-6400-H101
1FT6041-4AF71-3EG1

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描述

PLC的CPU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。不同型号的PLC,循环扫描周期在1微秒到几十微秒之间。程序计数器这样的循环操作,这是DCS所没有的。

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