6SE6420-2UC12-5AA1輸出模塊現貨供應歡迎詢價

6SE6420-2UC12-5AA1輸出模塊現貨供應歡迎詢價
6SE6420-2UC12-5AA1輸出模塊現貨供應歡迎詢價



可編程控制器的結構多種多樣，但其組成的一般原理基本相同，都是以微處理器為**的結構。通常由處理單元（CPU）、存儲器（RAM、ROM）、輸入輸出單元（I/O）、電源和編程器等幾個部分組成。
1．處理單元（CPU）
CPU作為整個PLC的**，起著總指揮的作用。CPU一般由控制電路、運算器和寄存器組成。這些電路通常都被封裝在一個集成電路的芯片上。CPU通過地址總線、數據總線、控制總線與存儲單元、輸入輸出接口電路連接。CPU的功能有以下一些：從存儲器中讀取指令，執行指令，取下一條指令，處理中斷。
2．存儲器（RAM、ROM）
存儲器主要用于存放系統程序、用戶程序及工作數據。存放系統軟件的存儲器稱為系統程序存儲器;存放應用軟件的存儲器稱為用戶程序存儲器；存放工作數據的存儲器稱為數據存儲器。常用的存儲器有RAM、EPROM和EEPROM。RAM是一種可進行讀寫操作的隨機存儲器存放用戶程序，生成用戶數據區，存放在RAM中的用戶程序可方便地修改。RAM存儲器是一種高密度、低功耗、價格便宜的半導體存儲器，可用鋰電池做備用電源。掉電時，可有效地保持存儲的信息。EPROM、EEPROM都是只讀存儲器。用這些類型存儲器固化系統管理程序和應用程序。
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ASEA BROWN BOVERI DSQC116 USPP DSQC116
ASEA BROWN BOVERI 3BHB003041R010?1 NSFP 3BHB003041R010?1
ALLEN BRADLEY 1784-KTK1 NSPP 1784KTK1
ASEA BROWN BOVERI EH450C-32VDC-T NSFP EH450C32VDCT
Texas Instruments 500-5018
ASEA BROWN BOVERI ACH401600632-A?0AE0000 USPP ACH401600632A0?AE
FOXBORO 760CSA-2A-1 NSFP 760CSA2A1
ADEPT TECH 10300-15520 NSFP 1030015520
FANUC A80L-0001-0273 USPP A80L00010273
505-3716 Texas Instruments/Si?emens TI 5053716 R11
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STENTOFON 630540-SB4 NSPP 630540SB4
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USED Perceptron 96K DSP Frame Grabber 495-0191 Rev R
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XYCOM 3300ACT USPP 3300ACT
Texas Instruments PM550-400 Loop Access Module PM550400
505-4832 Texas Instruments/Si?emens TI 5054832 R25
OMRON F30 NSFP F30
ASEA BROWN BOVERI G05400A00 USPP G05400A00
OMRON CS1W-SLK21 USPP CS1WSLK21
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