IC693CPU374 GE

U-02-1743-05 MK-A AJAX
MOX12-P3509 ALLEN BRADLEY CSMA/CD
AT-210T ALLIED TELESIS
MMLG01
BCG450-SD
1241 AMCI
AZ-R02 AMKASYN
AC-1 ANDOVER
Z-164A50 ANRITSU
2150S ARCHICE

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描述

系统程序是PLC赖以工作的基础,采用汇编语言编写,在PLC出厂时就已固化于ROM型系统程序存储器中。系统程序分为系统监控程序和解释程序。系统监控程序用于监视并控制PLC的工作,如诊断PLC系统工作是否正常,对PLC各模块的工作进行控制,与处设交换信息,根据用户的设定使PLC比处在编制用户程序状态或者处在运行用户程序状态等。

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