1794-IB16 AB

CPU的构成

    CPU是PLC的核心，起神经中枢的作用，每套PLC至少有一个CPU，它按PLC的系统程序赋予的功能接收并存贮用户程序和数据，用扫描的方式采集由现场输入装置送来的状态或数据，并存入规定的寄存器中，同时，诊断电源和PLC内部电路的工作状态和编程过程中的语法错误等。进入运行后，从用户程序存贮器中逐条读取指令，经分析后再按指令规定的任务产生相应的控制信号，去指挥有关的控制电路。

    CPU主要由运算器、控制器、寄存器及实现它们之间的数据、控制及状态总线构成，CPU单元还包括外围芯片、总线接口及有关电路。内存主要用于存储程序及数据，是PLC*的组成单元。

    在使用者看来，不必要详细分析CPU的内部电路，但对各部分的工作机制还是应有足够的理解。CPU的控制器控制CPU工作，由它读取指令、解释指令及执行指令。但工作节奏由震荡信号控制。运算器用于进行数字或逻辑运算，在控制器指挥下工作。寄存器参与运算，并存储运算的中间结果，它也是在控制器指挥下工作。

    CPU速度和内存容量是PLC的重要参数，它们决定着PLC的工作速度，IO数量及软件容量等，因此限制着控制规模。　　

厦门莫格电气自动化有限公司

：

：张美霞

电  话：/  

传  真：

地  址: 厦门市思明区槟榔西里197号第四层B19单元

http://www.mogget。。ｃｎ/

PLC系统的其它设备

1、编程设备：编程器是PLC开发应用、监测运行、检查维护*的器件，用于编程、对系统作一些设定、监控PLC及PLC所控制的系统的工作状况，但它不直接参与现场控制运行。小编程器PLC一般有手持型编程器，目前一般由计算机（运行编程软件）充当编程器。

2、人机界面：zui简单的人机界面是指示灯和按钮，目前液晶屏（或触摸屏）式的一体式操作员终端应用越来越广泛，由计算机（运行组态软件）充当人机界面非常普及。

3、输入输出设备：用于*性地存储用户数据，如EPROM、EEPROM写入器、条码阅读器，输入模拟量的电位器，打印机等。　　　

八、PLC的通信联网

    依靠*的工业网络技术可以迅速有效地收集、传送生产和管理数据。因此，网络在自动化系统集成工程中的重要性越来越显著，甚至有人提出"网络就是控制器"的观点说法。

    PLC具有通信联网的功能，它使PLC与PLC 之间、PLC与上位计算机以及其他智能设备之间能够交换信息，形成一个统一的整体，实现分散集中控制。多数PLC具有RS-232接口，还有一些内置有支持各自通信协议的接口。

    PLC的通信，还未实现互操作性，IEC规定了多种现场总线标准，PLC各厂家均有采用。

    对于一个自动化工程(特别是中大规模控制系统)来讲，选择网络非常重要的。首先，网络必须是开放的，以方便不同设备的集成及未来系统规模的扩展；其次，针对不同网络层次的传输性能要求，选择网络的形式，这必须在较深入地了解该网络标准的协议、机制的前提下进行；再次综合考虑系统成本、设备兼容性、现场环境适用性等具体问题，确定不同层次所使用的网络标准。

NNB CKD SSD-ML-40-40 PNEUMATIC CYLINDER
 
PARKER E-43-B-0500 INSTRUMENT GRADE POLYETHYLENE TUBING .170" X 500', NIB
 
NUMATICS 110/120V .08A SOLENOID VALVE, 237-325B
 
SMC CYLINDER CDLAFN100-175-E
 
BIMBA SS PNEUMATIC CYLINDER SS311-R
 
PARKER * SAE CODE 61 FLANGE HEAD * 11571-16-16
 
NUMATICS SOLENOID AIR PILOT ACTUATED VALVE R20BB500MP00061 / R20BBD00MP00061
 
SMC 3.5MPa PNEUMATIC CYLINDER CHDAL40-400-J59?WL
 
INTEGRAL HYDRAULIK HYDRAULIC CYLINDER1009882?1 160BAR 018-1354-062-00?3
 
NUMATICS 238610 110/120V 50/60HZ SOLENOID VALVE COIL, MP-C-080-032-D
 
MILCO PNEUMATIC CYLINDER CCC-204-4.0 REV B 100712
 
90 BRASS ELBOW ASSORTMENT, LOT OF 9
 
NUMATICS SERIES ISO5599/11 150 PSIG SOLENOID VALVE I24BB415MP
 
PARKER JIC P 16 SS FLUID CONNECTING NUT, LOT OF 17
 
HYDRAULIC THREAD NUT HMV 134/A-101
 
NUMATICS 150 PSIG SOLENOID VALVE I24SS415K
 
NUMATICS 110/120V .37A 150 PSIG-AIR SOLENOID VALVE W/ BASE, 554SA43AK000030
 
PARKER * PARKER TRIPLE-LOK 90 ELBOW * UNKNOWN
 
NUMATICS PNEUMATIC SOLENOID VALVE I35RS115J00 0000 100881
 
HYDAC BETAFIT 1.06.39D03BN HYDRAULIC FILTER ELEMENT, NIB
 
NORGREN 175oF, 300PSIG, REGULATOR R24-401-RNXA
 
FESTO 32MM BORE 250MM STROKE PNEUMATIC CYLINDER, DNU-32-250-PPV-?A
 
YUKEN HYDRAULIC CYLINDER CJT70-FA32B50B-?PD-EK
 
SMC CYLINDER CDNAFN80N-100-D?-J59WLS
 
LUBRIQUIP PUMP ASSEMBLY AL-25, 521-000-020, L-90
 
FESTO 63MM BORE 50MM STROKE PNEUMATIC CYLINDER, DKE-63-50-PPV-A
 
MAC 24 VDC 6.0W SOLENOID VALVE 280B-506AAAA
 
SMC 50MM BORE 200MM STROKE PNEUMATIC CYLINDER CNAFN50N-200-D
 
YUKEN HYDRAULIC CYLINDER CJT70-FA32B600B?-BAD
 
BI * BI UNION FITTING * UNKNOWN

FESTO 40MM BORE 400MM STROKE PNEUMATIC CYLINDER, DNC-40-400-PPV-?A, NNB
 
PARKER P11771 -20-20 CRIMP FITTING SAE CODE 61 FLANGE HEAD 45 ELBOW
 
YUKEN CYLINDER CJT70-FA80B80H-?CBA-N 2012-411A
 
MAC PR65C-11BA 150 PSI PR65C SERIES PRESSURE REGULATOR, NNB
 
FESTO 145 PSI, SERIES ED08-14918 PNEUMATIC CYLINDER ADV-40-50-A
 
BOSCH RACINE 221887
 
SMC VXZ2240L SINGLE UNIT ZERO DIFFERENTIAL PILOT OPERATED DIAPHRAGM VALVE
 
ASHCROFT DURAGAUGE BRONZE TUBE 30-0VACUUM-IN/H?G. GAUGE 45-1379 103764
 
PARKER 11971-32-32 SAE CODE 61 FLANGE HEAD 90 ELBOW
 
MAC 6311A-512-PM-11?1DA 110/120 VOLTS 50/60 SOLENOID VALVE
 
MLOK CYLINDER RCN-138600CA
 
NUMATICS 24VDC, 4.0W, 150PSIG-AIR, PNEUMATIC VALVE I34BA400MP00061
 
SMC PNEUMATIC SERVICE KIT NIB CK95-80 105415
 
PARKER 150PSI 1034kPa PNEUMATIC SOLENOID VALVE B511ABB53C
 
NUMATICS 150PSIG PNEUMATIC SOLENOID VALVE NNB I35SA43BK000030 100509
 
NUMATICS PNEUMATIC PRESSURE REGULATING VALVE 031RD700O000000 NIB
 
MLOK CYLINDER RCN-138600-800-?05
 
NUMATICS 110/120V .06A 60HZ 150 PSIG SOLENOID VALVE, 031SA415O011Z
 
NUMATICS 120 V, 50-60HZ, .08A SOLENOID VALVE 1525A425K
 
NUMATICS PNEUMATIC AIR FILTER REGULATOR F22B-01AM 99883
 
NUMATICS MAX OPERATING PRESSURE 150 PSIG SOLENOID VALVE 135BB515MP00061
 
FESTO CPV18-VI U502 DISTRIBUTION MANIFOLD ASSEMBLY 185 886 T402
 
GRACO 250PSI 17.5BAR AIR LINE REGULATOR A01 A 214848
 
FESTO 63MM BORE 920MM STROKE PNEUMATIC CYLINDER, DKE-63-920-PPV-?A
 
ADVANCE AUTOMATION AAC SK-1176 PNEUMATIC CYLINDER SERIES I, NNB
 
TAIYO PNEUMATIC CYLINDER 40X30 NPB031A000-0
 
FESTO ALUMINUM CYLINDER 10543 DKE-100-60-PPV-?P
 
ELECTRON BEAM ENGINEERING QCC HD 504 WELDING CABLE, LOT OF TWO, NIB
 
FESTO 145 PSI 100MM BORE 160MM STROKE PNEUMATIC CYLINDER, DNC-100-160-PPV?, NNB
 
FESTO 32mm BORE 150mm STROKE PNEUMATIC CYLINDER DNC-32-150-PPV-?A NNB
 
FESTO 63MM BORE 125MM STROKE PNEUMATIC CYLINDER, DNU-63-125PPV-A?, NNB
 
NUMATICS 120V, 0.11A, 150 PSIG SOLENOID VALVE I52SA400K046T
 
MAC VAC/25-150PSI, 24VDC, 2.5W, PNEUMATIC SOLENOID VALVE 6523B-000-PM-59?2DA
 
BIMBA BRACKET CYLINDER D-167
 
PARKER 035341300B FILTER, NIB
 
SMC 1.0MPA PNEUMATIC CYLINDER DLMBN20-25C-G59?LS
 
PARKER 5000PSI DIRECTIONAL CONTROL VALVE 44036-2026
 
PARKER 250PSI ROTARY PNEUMATIC ACTUATOR PTR252-0983F-AX?22-C21
 
SMC 0.05-0.85MPA AIR REGULATOR AR4000-04BG
 
KYOHO MACHINE HCI-XD CYLINDER 40MM BORE 435MM STROKE 40X435-FA 74H40956
 
STAFFA FIXED DISPLACEMENT HYDRAULIC MOTOR HM/HDB2005/11
 
FESTO CPV14-VI TD02 DISTRIBUTION MANIFOLD ASSEM W/ SILENCER AND ELBOW FITTINGS
 
MAC 110/120VOLTS 150PSI SOLENOID VALVE 6311D-211-PM-11?1DA
 
FESTO 145 PSI 100MM BORE 30MM STROKE PNEUMATIC CYLINDER, ADVU-100-30-A-P?-A, NNB
 
YUKEN HYDRAULIC CYLINDER CJT 70 FA32B 20N-DND EK 11A
 
BELLOWS 110/120V 50/60HZ PNEUMATIC SOLENOID PILOT VALVE, K175-9035
 
FESTO 145 PSI 50MM BORE 90MM STROKE PNEUMATIC CYLINDER, DNG-50-90-PPV-A?, NNB
 
FESTO CPV14-VI T402 DISTRIBUTION MANIFOLD ASSEM W/ SILENCER AND ELBOW FITTINGS

FESTO 145 PSI 50MM BORE 153MM STROKE PNEUMATIC CYLINDER, DNGU-50-153-PPV?-A, NNB
 
YUKEN HYDRAULIC CYLINDER CJT70-FA32B25N-?AND-EK 20A
 
MAC 110/120V 50/60HZ 150 PSI SOLENOID VALVE, 58D-43-116AA
 
CKD PNEUMATIC CYLINDER SSD-KL-50-80
 
PARKER HHB4087501 ALR 35-150 PSIG CONTROL VALVE, NNB
 
NUMATICS PNEUMATIC FILTER MODEL F30B-04C NIB
 
FESTO FLAT CYLINDER DZH-50-300-PPV-?A
 
BIMBA AIR CYLINDER BFT-093-D
 
PARKER 11771-32-32 CRIMP FITTING SAE CODE 61 FLANGE HEAD -45 ELBOW
 
KYOHO MACHINE HCI-XD CYLINDER 50MM BORE 115MM STROKE 50X115-CB 66H50888
 
PARKER 2.00 " BORE 8.000" STROKE HYDRAULIC CYLINDER JMAU14A
 
LENZ * LENZ NUT FITTING * UNKNOWN
 
NUMATICS 150PSIG, 110-120V, 50/60Hz, .15A, SOLENOID VALVE 081SS400K000030
 
FAIRCHILD TD C17800-406 PNEUMATIC TRANSDUCER, NNB
 
NUMATICS L23PM452O000000 PILOT VALVE, NNB
 
MAC PR92C-KECA 120 PSI PRESSURE REGULATOR, NIB
 
SMC PNEUMATIC CYLINDER 25MM BORE 35MM STROKE CQSB25-35D
 
NUMATICS 24VDC 4.0W 150 PSIG-AIR PNEUMATIC SOLENOID VALVE, I24BA415MP
 
NUMATICS 0-232 PSIG PNEUMATIC SOLENOID VALVE W/ BASE, I34JJ641O000000
 
NUMATICS 110/120V 50/60HZ 150 PSIG-AIR SOLENOID VALVE W/ BASE, I35BA415KKP0003?0
 
MAC PR92C-KECA 120 PSI PRESSURE REGULATOR WITH GAUGES, NIB
 
VERSA 120V 100PSI SOLENOID VALVE ESM 8012 44 Z CLL36
 
KYOHO HCI-XC HYDRAULIC CYLINDER 40X100-FB / 56H40995
 
NUMATICS 100-115V/50Hz, 110-120V/60Hz, .06A SOLENOID COIL 237-1045B
 
MAC 24 VDC 2.5W 150 PSI SOLENOID VALVE W/ BASE, 6313D-611-PM-59?1DA
 
BELLOWS INTERNATIONAL SOLENOID VALVE W / PILOT VALVE L615-49-102 / K065-9035
 
ASHCROFT DURAGAUGE 30-IN./HG.VAC-3?0PSI PRESSURE GAUGE 102553
 
MILWAUKEE CYLINDER 4.00 BORE 6.00 STROKE 1000 PSI HYDRAULIC CYLINDER LH61
 
CMT DOUBLE ACTING IMPACT MARKER W/ PROXIMITY SENSOR 288-0B-25-PML-W?2817
 
SMC 1.0MPS PNEUMATIC PRESSURE REGULATOR FILTER AF4000-04D