描述
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。
②用单片机作CPU
自从1974年出现单片机以来,已有不少产品采用单片机做可编程序控制器。日本三菱F系列PLC就采用美国INTEL公司MES-48系列的单片机8049和8039做处理器,8039单片机在一块片子上集成了8位的CPU,128×8的数据存储器。27条输入/输出线,T0、T1、INT测试线及8位定时器/计数器,时钟振荡电路等。
自80年代以来,出现了集成度更高。功能更强,并带有“布尔机”而又便于作数据通信的MCS-51系列单片机以及功能更高的16位单片机,大有取代MCS-48系列之势。日本三菱的F2系列PLC即采用CPU8031。MCS-51系列单片机是美国INTEL公司在MCS-48单片机基础上,于80年代初推出的产品,具有高集成度、高可靠性、高功能、高速度、低价格等特点。它有三个代表产品:8051、8751和8031,它们分别有不同的应用特性。8051是以4K字节EPR0M代替4K字节的R0M的8051;8031是内部无R0M8051。必须外接EPR0M;INTEL公司的96系列的单片机,字长为16,运算速度比51系列更高,这必将为高档次的PLC开发和应用带来美好的远景。用单片机制成的PLC有以下显著特点:为机电设备一体化创造了条件,因为由单片机制成PLC,体积更小。同时PLC逻辑功能很强,并且具有数值运算和通信接口。
欧美品牌停产的,常用的“PLC”备品备件
我司产品应用于以下领域:
1,《发电厂DCS监控系统》
2,《智能平钢化炉系统制造》
3,《PLC可编程输送控制系统》
4,《DCS集散控制系统》
5,《智能型消防供水控制系统》
6,《化工厂药液恒流量计算机控制系统》
7,《电气控制系统》造纸,印染生产线,变电站综合自动化控制系列
本特利,英维思,伍德沃德,福克斯波罗、西屋、瑞恩、施耐德莫迪康、ABB、AB、西门子、摩托罗拉、GE发那科、安川、博世力士乐,ACSO,力士乐等各大品牌的DCS系统配件,机器人系统配件,大型伺服系统备件。
L75905 Applied Bio.Pioneer Cont.Flow Peptide Synth.
G75505 Rorze Robot RR721L202H-H30-?ICA-3&CURR-2292-1
Enlarge
C51192 Tektronix DTG 5274 Data Timing Generator 2.7Gb/s
C51191 Tektronix DTG 5274 Data Timing Generator 2.7Gb/s
C70445 MEI Marpet Mech-El 779 Manual Epoxy Die Bonder
C70443 Mech-El 703 Manual Eutectic Die Attach Bonder
K69277 Quad/de Haart MPC-20 Screen Printer Untested
C60415 Unitek Micropull IV Wire Bond Pull Tester 1000g
C61654 Unitek Micropull IV Wire Bond Pull Tester RS232
C59001 Unitek Micropull IV Wire Bond Pull Tester
C72803(2)Christie Electrohome Roadie S12 Projectors
AE43755 RECIF SA Wafer Scribe Reader IDLW8 System
C69112 Spectra Multi-Quad LMI Gas Analyzer w/Turbo Vac
A41046 ADE Technologies DiskMapper Model M2 System
A74032 US Motors Titan Vertical Motor 250 HP,Emerson
L75703 GE Column Screening Kit*NIB*11-0035-95
L75704 GE P-960 Sample Pump*NIB*18-6727-00
C75918 Cosam BCU-T932RSR 3-Channel Chiller-10°C~+90°C
A66346 Piller Apostar AS50 UPS System 50 kVA,480V 85A
A73256 Applied Materials 0010-40099 RF Generator 10kV
A75233 Wentworth Labs 6”Prober w/Unitron ZSB Scope
A73776 Gyros Gyrolab xP Workstation
A73488 Douglas Instruments Oryx 6 w/XYZV Plateholder
C69602 Logitech 2125 Polishing/Bonding Jig
A58951 K&S 6491 Semi-Automatic Die Bonder
C54973 Agilent 16950A 600MHz State/4GHz Timing/4Meg Mem
C54587 Agilent 16950A 600MHz State/4GHz Timing 4Meg Mem
A73483 US Motors Titan Vertical Motor 250 HP,Emerson
A73480 Thermo Jarrell Ash Iris 1000 Spectrometer System
C51193 Agilent E4406A Transmitter Tester w/202 300 BAF
C52517 Agilent E4406A Transmitter Tester w/202 300 BAH
C72658 FST Fine Semitech Dual Recirculating Chiller
C59032 Signatone S-1007S 5″Wafer Prober Probe Station
C72660 FST Fine Semitech Dual Recirculating Chiller
C72659 FST Fine Semitech Dual Recirculating Chiller
A74819 K&S 1470 Automatic Wedge Bonder
A74820 K&S 1470 Automatic Wedge Bonder
C75091 Eppendorf 5804 R Refrigerated Centrifige 5804R
C51195 HP E4406A VSA Transmitter Tester w/BAH,204,UK6
C51194 Agilent E4406A Transmitter Tester w/Opt 202 BAH
G75520 Nikon Diaphot 200 Microscope w/Nikon Optics
Enlarge
A71514 Leitz Wetzlar Trinocular Microscope w/Stage
C51174 HP E4406A Transmitter Tester 7MHz-4GHz w/Opt BAH
C75758 Nikon Labophot-2 Trinocular Teaching Microscope
L67921 Hughes Wire Bonder System WD-8700D1
A63423 Bemco Inc.FC-77 Cart Environmental Pump System
C58955 Signatone S-250-5 Wafer Prober w/B&L Microzoom
A58956 3S 8013 Pick&Place Inspection Wafer Station
A74033(2)Coherent Laserpure 20 Heat Exchanger
C73122 Isel Wafer Handling Robot w/built-in Controller
K73702 Spectra-Physics T20-8S40 Diode Laser System
G75111 Nikon Diaphot Microscope w/Lenses&Eyepieces
Enlarge
C66608 Dage TP1KG Tweezer Load Cell 1kg for 2400PC
A75225 Labconco Delta Series Class II Biosafety Hood
A73918 New Brunswick Innova CO-170 CO2 Incubator
A73919 HP Series 1050 Autosampler,G1303A,79853C
C70150 Dage DC2 TurboSonic PCB Board Washing Station
A72127 Waters 600 Multisolvent Delivery System HPLC
A72125 Waters 4000 Pump System Controller HPLC
A72126 Coherent Innova 90 Argon Ion Laser System
C74126 Laserscope KTP/532 Nd:YAG Surgical Laser System
C73470 Spectra-Physics T20-8S40 Diode Laser System
C65584 Perkin Elmer 1002700 Vacuum Ion Pump System
C51594 Agilent 16950A 600MHz State/4GHz Timing/1Meg Mem
A73479 Blue M Oven CR07-1406F-2,204°C/400°F
C61589 Varian G-292 Rotating Anode X-Ray Tube in B-130H
C73507 Cartesian HONEYBEE Protein Crystallization Syste
C71355 Isel Wafer Handling Robot w/Built-In Controller
G75594 Sanyo CO2 Incubator MCO-18AIC(UV)
Enlarge
C70346 Veeco Dektek SXM Atomic Force Microscope Control
G75595 Sanyo CO2 Incubator MCO-18AIC(UV)
Enlarge
L75707 Nikon Optiphot-2 Microscope&Camera/Controll?er
L75708 Precision 200R Durafuge Refrigerated Centrifuge
G73928 HP G1330A ALS Therm Series 1100