可编程控制器PLC是一种专门为在工业环境下应用而设计的数字运算操作的电子装置。它采用可以编制程序的存储器，用来在其内部存储执行逻辑运算、顺序运算、计时、计数和算术运算等操作的指令，并能通过数字式或模拟式的输入和输出，控制各种类型的机械或生产过程。PLC及其有关的外围设备都应该按易于与工业控制系统形成一个整体，易于扩展其功能的原则而设计

PLC即可编程控制器（Programmable logic Controller，是指以计算机技术为基础的新型工业控制装置。在1987年电工委员会（International Electrical Committee）颁布的PLC标准草案中对PLC做了如下定义：  PLC英文全称Programmable Logic Controller ,中文全称为可编程逻辑控制器，定义是:一种数字运算操作的电子系统，专为在工业环境应用而设计的。它采用一类可编程的存储器，用于其内部存储程序，执行逻辑运算,顺序控制，定时，计数与算术操作等面向用户的指令，并通过数字或模拟式输入/输出控制各种类型的机械或生产过程.PLC是可编程逻辑电路，也是一种和硬件结合很紧密的语言，在半导体方面有很重要的应用，可以说有半导体的地方就有PLC  PLC是一种专门为在工业环境下应用而设计的数字运算操作的电子装置。它采用可以编制程序的存储器，用来在其内部存储执行逻辑运算、顺序运算、计时、计数和算术运算等操作的指令，并能通过数字式或模拟式的输入和输出，控制各种类型的机械或生产过程。PLC及其有关的外围设备都应该按易于与工业控制系统形成一个整体，易于扩展其功能的原则而设计。  电工委员会(IEC)在其标准中将PLC定义为:  「可程式逻辑控制器是一种数位运算操作的电子系统，专为在工业环境应用而设计的。  它采用一类可编程的存储器，用于其内部存储程序，执行逻辑运算、顺序控制、定时、计数与算术操作等  面向用户的指令，并通过数字或模拟式输入/输出控制各种类型的机械或生产过程。可程式逻辑控制器及  其有关外部设备，都按易于与工业控制系统联成一个整体，易于扩充其功能的原则设计。」  PLC的特点  2.1可靠性高，抗*力强  高可靠性是电气控制设备的关键性能。PLC由于采用现代大规模集成电路技术，采用严格的生产工艺制造，内部电路采取了*的抗干扰技术，具有很高的可靠性。例如三菱公司生产的F系列PLC平均*时间高达30万小时。一些使用冗余CPU的PLC的平均*工作时间则更长。从PLC的机外电路来说，使用PLC构成控制系统，和同等规模的继电接触器系统相比，电气接线及开关接点已减少到数百甚至数千分之一，故障也就大大降低。此外，PLC带有硬件故障自我检测功能，出现故障时可及时发出警报信息。在应用软件中，应用者还可以编入外围器件的故障自诊断程序，使系统中除PLC以外的电路及设备也获得故障自诊断保护。这样，整个系统具有*的可靠性也就不奇怪了。  2.2配套齐全，功能完善，适用性强  PLC发展到今天，已经形成了大、中、小各种规模的系列化产品。可以用于各种规模的工业控制场合。除了逻辑处理功能以外，现代PLC大多具有完善的数据运算能力，可用于各种数字控制领域。近年来PLC的功能单元大量涌现，使PLC渗透到了位置控制、温度控制、CNC等各种工业控制中。加上PLC通信能力的增强及人机界面技术的发展，使用PLC组成各种控制系统变得非常容易。  2.3易学易用，深受工程技术人员欢迎  PLC作为通用工业控制计算机，是面向工矿企业的工控设备。它接口容易，编程语言易于为工程技术人员接受。梯形图语言的图形符号与表达方式和继电器电路图相当接近，只用PLC的少量开关量逻辑控制指令就可以方便地实现继电器电路的功能。为不熟悉电子电路、不懂计算机原理和汇编语言的人使用计算机从事工业控制打开了方便之门。  2.4系统的设计、建造工作量小，维护方便，容易改造  PLC用存储逻辑代替接线逻辑，大大减少了控制设备外部的接线，使控制系统设计及建造的周期大为缩短，同时维护也变得容易起来。更重要的是使同一设备经过改变程序改变生产过程成为可能。这很适合多品种、小批量的生产场合。  2.5体积小，重量轻，能耗低  以超小型PLC为例，新近出产的品种底部尺寸小于100mm，重量小于150g，功耗仅数瓦。由于体积小很容易装入机械内部，是实现机电一体化的理想控制设备。

先学会看梯形图，学会电工基本电路，这都是基本，买几本入门到精通的书，案例教程、视频教程、PLC实例，泡论坛学习看别人的程序学着去做，多向别人请教，无师自通唯有这样。你也可以参加PLC培训，在学校时我在技成培训网买视频学习，还是老师*的，你不妨去看下，是否符合你。

AMAT Applied Materials 0100-90880 Turbopump Interface Board Rev.A XR80 working

AMAT XR80 0100-00505 Rev. A Vacuum Control Feedback Board Used Working

AMAT Applied Materials 0100-91082 XR80 Sensors Board Rev. D Used Working

AMAT Applied Materials XR80 X-Y Displacement & Splitter Box 0090-91586 Rev.C

Applied Materials 25' KVM Harness Assembly 0140-14384 Lot of 3 New

AMAT 0100-90859 Rev. B I/V Converter Power Supply Board Used Working XR80

AMAT Applied Materials 0020-41086 Centura Power Supply 0020-41218 working

Applied Materials AMAT 0100-90861 Spin Scan Detector Board Used Working XR-80

Applied Materials AMAT 0100-90650 Wheel Current Board Used Working XR80

AMAT Applied Materials 0100-90071 Cryo Pump Temp Monitor Board Used Working XR80

AMAT 0100-00504 Vacuum Control Feedback Board Used Working XR80

Applied Materials AMAT 0100-90286 Beam Profiler Interface Board Working XR80

Applied Materials AMAT 0100-01366 Vibration Monitor Board Used Working XR80

Applied Materials AMAT 0020-81224 Arc Chamber New

AMAT 300mm Internal Membrane Clamp 0021-17972

AMAT Applied Materials 10762200 75FT RF Cable 0620-02771 New

AMAT Applied Materials 0190-33337 Heater Jacket Gemini Used Working

AMAT Applied Materials 0100-09134 DIO Fuse Board Rev. B Working P5000 Lot of 4

Opal 13811 Power Relay Board AMAT Applied Materials SEMVision Used Working

Opal SMC/M-Vacuum PCB Board 70317875200 Working AMAT SEMVision

D-Link DES-3528 28-Port Managed Switch xStack AMAT 0190-37330 New

MFD-1307 Applied Materials 75 FT DC Cable AMAT 0190-01559 New

AMAT Applied Materials PVD 6" Process Kit 0020-28064

Applied Materials AMAT Circuit Breaker 0680-01826 0680-02131 Lot of 2 New

Applied Materials AMAT Encore Feedthrough Insulator Pair 0200-02121 Lot of 2 New

Applied Materials AMAT SCR CAP SKT HD 6/32x 1/4L Hex 0021-08063 Lot of 24 New

Applied Materials AMAT Non-Seismic Securement Kit for 300mm 0240-52481 New

AMAT Endura 300mm Chamber Harness Assy 0140-06222 New

AMAT C/A Mainframe Interlock Main Cable 0150-04722 New

Applied Materials AMAT 75' DC Cable 0150-13757 New

AMAT Applied Materials 0100-01875 AC Distribution Board Used Working

AMAT ORing ID: 9.984 CSD: .210 Lot of 12 3700-03048 New

AMAT Plate Blocker Assy. 150mm 0020-09316 new

AMAT PVD Robot Umbilica Harness Assy 0140-01893 New

AMAT MF to XFR Robot Harness Assembly 0140-76569 New

AMAT Applied Materials 0100-00313 Quantum Loadport Controller PCB Used Working

AMAT Applied Materials 0100-18058 TC AMP INTLK Ultima PCB Assembly New

AMAT Applied Materials 300mm PVD Chamber Cryo-Shield 0021-16035 new

AMAT Applied Materials 0020-87128 300mm Tray Dome Controller new

AMAT Applied Materials 0010-51957 Water Manifold Assembly New Surplus

AMAT Applied Materials 0010-51957 Water Manifold Assembly 90° New Surplus

AMAT Applied Materials 0041-33571 DIW Distribution Manifold ECSA LDM New

AMAT Applied Materials 0041-34170 DIW Distribution Manifold ECSA LDM New

AMAT Applied Materials 1843623012 AC Servo Motor XBR-2310 AMAT 0010-70836 Used

AMAT Applied Materials 7-213729 AC Servo Motor XBR-2310 AMAT 0010-70836 Working

AMAT Applied Materials 4200689 Air Manifold Assembly Used Working

AMAT Applied Materials 3060-00835 Ball Bearing lot of 416 new

Applied Materials AMAT XR80 0100-90650 Rev. B Wheel Current Board Used Working

AMAT Applied Materials 0021-60948 2-Zone Lower Plate New

AMAT 0100-90860 Beam Stabilizing Monitor Board Used Working XR80

AMAT 0100-90860 Rev. H Beam Stabilizing Monitor Board Used Working XR80

AMAT 0100-90468 Rev. F Charge Voltage Board Used Working XR80

EMC MSE402 Power Board Used Working AMAT XR80

AMAT Applied Materials 0100-40037 Rev. B Signal Conditioning Board Used Working

AMAT Applied Materials 0010-10010 Manual Control Gate Valve Precision 5000

Applied Materials AMAT 0020-09933 Gas Distribution Plate New

AMAT Upper 8-inch Ring Bearing 0190-10292 MFR 06144 ITB-18720AS14 NEW Lot of 3

AMAT Applied Materials 0010-25625 Slit Valve Door new

AMAT Regulator Retrofit Assy 0190-07593 New

AMAT Applied Materials P/N 0200-09092 Rev B Graphite Ring 125MM New Surplus

Applied Materials AMAT 0020-82550 Holder New

Applied Materials AMAT 0200-09092 Graphite Ring 125MM New

AMAT XR80 Decel PSU Interface 0100-90934 working

AMAT Applied Materials 0100-70019 Controller Distribution WPS Board Rev. A

Applied Materials AMAT Metal 300mm ALD Gas Feed Thru SST HVCR 0041-32201 New

AMAT Applied Materials 0242-26957 RPG Chbr Foreline Integration Kit New

Applied Materials AMAT DI Cooler H2O FTGS/HOSES Kit 0240-17101 New

AMAT Applied Materials Motor Cover 0030-00049 Rev. 003 Used Working

Applied Materials AMAT Gas Line 0190-13213 0050-75279 0050-92389 Lot of 12 New

AMAT Applied Materials 0020-78126 Inlet/Outlet Manifold Pump Rev. A Used Working

AMAT Applied Materials 0020-78126 Inlet/Outlet Manifold Pump Rev. P1 Used

AMAT Applied Materials 0020-79339 Inlet/Outlet Manifold Pump Used Working

AMAT Applied Materials 0020-78127 Manifold Block Lot of 2 Used Working

AMAT Applied Materials 27920 Grooved Pulley SQ Coated Used Working

AMAT Applied Materials 3420-00341 ESC Coupling Insulator YRC675 New

AMAT Applied Materials 4020-00462 Filter 111396 New

AMAT Applied Materials 0010-34966 Operator Interface New

AMAT Applied Materials 3300-06002 Flex Coupling 4" Lot of 2 New

AMAT Applied Materials 0242-16421 Size 4 24 VDC Power Head Working

AMAT Applied Materials 162972-5113 8-Port AI/AO Block AMAT 0090-02288 New

AMAT Grafoil Gasket 464-16739-00 new

AMAT 52ft Wafer Bias Cable Assembly 0190-02031 New

AMAT Applied Materials 0020-89586 Liner End Cathode Issue A lot of 10 new

Applied Materials AMAT 0200-09088-B 125MM quartz ring New

Applied Materials AMAT 0200-09088-C 125MM Quartz Ring New

Applied Materials AMAT 0020-03431 Insert Pedestal 125MM New

AMAT Applied Materials AC Window Assembly 0240-00598

AMAT Applied Materials 0220-03190 RF Monitor working

AMAT Applied Materials Anti-Cloud Assembly 0090-00044

Applied Materials AMAT 0020-98696 Cover Plate New

Applied Materials AMAT CL PVD Source Electrical Bracket 0041-08444 Lot of 2 New

Applied Materials AMAT SIPCU Gas Line Manifold Mainframe to CHM 0040-49827 New

AMAT Applied Materials 0242-22009 Endura 300CL M/F IO LCF Cable Kit New

AMAT 0620-01698 15ft Network Cable Assembly w/ Modular Plug lot of 2 new

Applied Materials AMAT Guide Lift Pin SST Heater 300mm 0200-00318 Lot of 6 New

AMAT Applied Materials 0242-20799 Endura AMP P5 Bracket Support Kit New

Applied Materials AMAT Slit Valve Viton Face Plate 0040-23526 New

Applied Materials AMAT Analog I/O AIO PCB 0100-00546 Rev. 002 Used Working

Applied Materials AMAT Endura Clear Lid Kit 300mm 0200-03626 New

Pentagon Technologies PT-0143-0011 RF Shield Endura 8" PVD New

AMAT Applied Materials 3060-00275 Vinton Sealed Ball Bearings Lot of 16 New

AMAT Applied Materials 0100-01765 I/O Interface Board Rev. 002 Used Working

AMAT Exhaust Temp Warning Retrofit Kit 170-10818-00 New

AMAT Applied Materials 0041-48869 Orienter Mount Plate New

AMAT Applied Materials 0100-90710 Vacuum Gauge Interface Board Rev.D working

AMAT Applied Materials 670794 Prom Board Used Working

KLA-Tencor 11102207 Basic Module PCB Assembly AMAT 0660-00786 Used

Daikin DUA19DNN01 Perfluoro Elastomer Seal O-Ring AMAT 3700-03715 Lot of 9 New

Infranor MH0606 P43 Servo Amplifier Drive Board Used Working

MKS Instruments AS00348-02 eDiagnostics System Interface Blue Box 4000x working

AMAT XR80 0100-01032 Vacuum Control Interlock Board Used Working

AMAT XR80 0100-01033 Rev. A Vacuum Control Interlock Board Used Working

AMAT Applied Materials 0100-90773 Rev. E Wafer Arm Servo Board Used Working

AMAT Optical Sensor Assy. 0190-03567 untested

Festo 214329-B Bilz Air Supply Box AMAT 0190-A8790 New

AMAT Applied Materials 0242-25144 7-Emitter Ionizer Bar Kit New

AMAT Applied Materials 0190-14224 Flex Distribution Panel Assembly new

Applied Materials AMAT 672544 Prom Board Used Working

Applied Materials AMAT RAM Memory Board 672532 Rev. C Used Working

AMAT Applied Materials 0030-76002 P5000 Mark II Front Cassette Bezel

AMAT Applied Materials 0100-09175 Interlock Board TEOS P5000 Precision 5000

AMAT Applied Materials 0041-33021 300mm HHXP Robot Axis-0 Magnet Hub new

AMAT Applied Materials 0040-79668 Wafer Carrier Used Working

Applied Materials AMAT 0200-09222 External Quartz Ring 8" New

AMAT 0100-90560 Rev. C Vacuum Control Interlock Board Used Working XR80

AMAT Applied Materials 0100-91085 Guiding Tube PCB Issue E XR80 Used Working

AMAT 0090-91594 Power Supply Module Board Used Working XR80

AMAT XR80 Applied Materials 0090-91271 Power Supply Rev.A working

AMAT Applied Materials 0100-90724 Rev. C Guiding Tube Board Used Working

AMAT Applied Materials 0200-40112 E-C 200mm Quartz Cover new

AMAT Applied Materials Quartz Chamber Slit Valve Insert 0200-40091 New

ETO ABX-X355 RF Generator Control PCB Rev. H Used Working

ETO ABX-X355 RF Generator Controller Board Rev. A Used Working

ETO ABX-X355 RF Generator Control PCB Used Working

AMAT Lower Preclean Shield 0040-61580 300mm New

AMAT 0100-00505 Vacuum Control Feedback Board Used Working XR80

Applied Materials AMAT 0200-00157-P1 Top ring 125MM New

AMAT Applied Materials 0020-40569 Conversion Plate Robot New

Applied Materials AMAT Cryo Port Bias Match Bracket 0021-41596 New

AMAT Applied Materials 0010-26750 Slit Valve Door new

AMAT O-Ring 15.955 x .275 Viton 3700-01482 Lot of 7 New

Applied Materials AMAT 300mm Chamber Controller Cover Kit 0240-30959 New

AMAT Applied Materials BES-9175-36C 50ft High Temp Chiller Hose DPS II New

AMAT Applied Materials 0100-90881 Vacuum Interlock Board Rev.B XR80 working

AMAT XR80 0100-90071 Rev. Y Cryo Pump Temp Monitor Board Used Working

AMAT Applied Materials 0100-90286 Beam Profiler Interface XR80 Used Working

AMAT Applied Materials XR80 Vacuum Control Feedback 0100-00504 Rev.A working

Applied Materials AMAT XR80 Arc Voltage Control Board 0100-90930 Used Working

Applied Materials AMAT XR80 0100-94006 Rev. A Spin Controller Board Used Working

AMAT XR80 Implanter Logic Board 0100-90875 working

AMAT Applied Materials 1843623012 AC Servo Motor XBR-2310 AMAT 0010-03907 Used

AMAT Applied Materials 221-7428E0 Spring Bellow Assembly WDX AMAT 0190-A9530 New

AMAT Applied Materials 0021-34715 Low 300mm Cathode Liner new

AMAT Applied Materials 0021-81146 300mm HDPCVD Telfon 18" Dome Ring new

AMAT 0100-94006 Spin Controller Board Used Working XR80

AMAT 0100-94097 Rev. B Vibration Used Working XR80

AMAT 0100-90973 Rev. A Orienter Interlock Board Used Working XR80

AMAT 0100-91095 Rev. A Pneumatics Control Board Used Working XR80

AMAT Applied Materials Mainframe Interlock Cable 0150-04722 new

Applied Materials AMAT Clip Silicon Sprayed 0040-96525 New

AMAT Applied Materials Network Module 9090-00491

AMAT Endura 6" PVD Process Kit 84-9502-280 in Keal Case

Applied Materials AMAT 0100-40027 Inverter Board Used Working XR80

Applied Materials AMAT 0100-90443 Spin Window Board Used Working XR80

Applied Materials AMAT 0100-90890 Spin/Scan INTLK Board Used Working XR80

AMAT 0100-90706 Rev. B Vacuum Manual Control Board Used Working XR80

Applied Materials AMAT 0200-09473-B Clamp Ring New

Applied Materials AMAT 0020-04277 Flange New

Applied Materials AMAT 0020-30700 Insert Polysulfone 125MM New

Applied Materials AMAT 0020-31488 Gas Distribution Plate New

AMAT Applied Materials 0190-76252 DeviceNet I/O Block DIP294 Used Working

MFD-3006 Applied Materials 50 FT DC Cable AMAT 0190-01560 New

AMAT XR80 0100-94102ITL Pressure Override PCB Board 0100-94102 working

AMAT Applied Materials A.C. Window Control 0090-00045

AMAT Applied Materials 0200-08583 300mm PCII 2.0 Quartz Long Bushings lot of 18

AMAT Applied Materials 0242-18504 300mm PCII Adapter Installation Kit New

Applied Materials AMAT CONN ADPTR PNL MTG QDS-F/M 0720-04376 Lot of 7 New

AMAT Applied Materials 0040-75563 Load Lock Roughing Manifold Used Working

AMAT Applied Materials 0021-15605 300mm Upper Shield Exhaust new

AMAT Applied Materials 0240-17388 Asst Dual RF/IF Tag Reader Kit New

AMAT FTG Vacuum Full Nipple NW25 Lot 3300-09057 new

Siemens Schmidbauer Transformer Pair AMAT XR80

AMAT Applied Materials XR80 Spin Window Card 0100-00970 Rev.A working

AMAT Applied Materials XR80 Switch Box 0010-91458 Rev.B working

AMAT Exhaust Ball Valve Wldmnt 210-17948-00 New

AMAT Applied Materials 0190-36511 DeviceNet I/O Block DIP294 Used Working

AMAT 0100-91040 Rev. D Vacuum Manual Control Board Used Working XR80

AMAT Applied Materials 3930-00256 IR Controller Box lot of 2 new

Applied Materials AMAT 0100-90177 Rev.C Vacuum Control Drive Board Working XR80

AMAT 0100-90178 Rev. J Vacuum Control Feedback Board Used Working XR80

Applied Materials AMAT 0200-00043 Quartz Ring New

Applied Materials AMAT 0200-09217 Quartz Ring 200MM New