IC695PSD140 

IC695PSD140  IC695PSD140  IC695PSD140  IC695PSD140  

6FC5095-0AB00-1RP1 

6FC5095-0AB00-1CP1 

6FC5095-0AB00-1DP1 

6FC5095-0AB00-1EP1 

6FC5095-0AB00-1RP1 

6FC5095-0AB10-0AP0 

6FC5095-0AB10-0RP0 

6FC5095-5AA71-1BG0 

6FC5095-5AA71-1CG0 

6FC5095-5AA71-1DG0 

6FC5095-5AA71-1EG0 

6FC5100-0AA01-0AA1 

6FC5100-0AB01-0AA1 

6FC5100-0AB02-0AA0 

6FC5101-0AA01-0AA0 

6FC5101-0AB01-0AA0 

6FC5101-0AB02-0AA0 

6FC5103-0AB01-0AA2

6FC5103-0AB03-0AA3 

6FC5103-0AB03-1AA3 

6FC5103-0AC01-0AA0 

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6FC5110-0BB01-0AA2 

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6FC5110-0DB02-0AA2 

6FC5110-0DB02-0AA4 

6FC5110-0DB03-0AA3 

6FC5110-0DB03-0AA4 

6FC5111-0BA00-0AA0 

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6FC5111-0CA01-0AA0 

6FC5111-0CA02-0AA2 

6FC5111-0CA03-0AA2 

6FC5111-0CA04-0AA0 

6FC5111-0CA05-0AA0 

6FC5111-0CA70-0AA0 

6FC5111-0CA73-0AA1 

6FC5111-0CB01-0AA0

6FC5111-0CB02-0AA0 

6FC5112-0CA02-0AA0 

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6FC5114-0AB01-0AA1 

6FC5135-0AA01-0AA0 

6FC5147-0AA00-0AA0 

6FC5147-0AA03-0AA0 

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6FC5147-0AA07-0AA1 

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6FC5147-0AA13-0AA0 

6FC5147-0AA13-0AA1 

6FC5147-0AA14-0AA2 

6FC5147-0AA15-0AA1 

6FC5147-0AA18-0AA0 

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6FC5147-0AA23-0AA0 

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6FC5150-0AA61-0AA0 

6FC5150-0AB01-0AA0 

6FC5150-0AB21-0AA0 

6FC5150-0AC10-0AA0 

CPU是PLC的核心组成部分，与通用微机的CPU一样，它在PLC系统中的作用类似于人体的神经中枢，故称为“电脑”。其功能是：

a、按PLC中系统程序赋予的功能，接收并存储从编程器输入的用户程序和数据。

b、用扫描方式接收现场输入装置的状态式数据，并存入映象寄存器或数据寄存器中。

c、诊断电源、PLC内部电路的工作状态和编程过程中的语法错误。

d、在PLC进入运行状态后，从存储器中逐条读取用户程序，经过命令解释后按指令规定的任务，产生相应的信号，去启闭有关控制门电路。分时分渠道地去执行数据的存取、传送、组合、比较和变换等操作，完成用户程序中规定的逻辑式算术运算等任务。根据运算结果，更新有关标志位的状态和输出映象寄存器的内容，再由输出映象寄存器的位状态式数据寄存器的有关内容，实现输出控制、制表、打印式数据通讯等。

PLC常用的CPU主要采用通用微处理器、单片机或双极型位片式微处理器。通用的微处理器     型位片式微

①用通用微处理器作CPU

在低档PLC中，用Z80A做CPU较为普遍，Z80A用于PLC有如下长处： Z80（或Z80A）CPU及其配套的芯片廉价、普及、通用，用这套芯片制成的PC，给维修及推广普及带来方便。Z80有独立的输入/输出指令,而且指令格式较短，执行时间也较短，这样有利于扫描周期的缩短。Z80输入/输出指令格式较短，相应的输入/输出设备编码也较短，所以相应的译码硬件器较简单。由于Z80的信息是采用输入/输出映射方式，因而设计流程序时，对输入/输出与存储器寻址容易区别。