福建中立恒自动化设备有限公司
目前,世界上有200多个厂家生产可编程序控制器产品,厂家有德国的西门子,美国的Rockwell(AB)、通用(GE),日本的三菱、欧姆龙,法国的施耐德等。
可编程序控制器总的发展趋势是向高集成度、小体积、大容量、高速度、易使用、高性能方向发展。具体表现在以下几个方面:
(1)向小型化、专用化、低成本方向发展
20世纪80年代初,小型PLC在价格上还高于小系统用的继电器控制装置。随着微电子技术的发展,新型器件大幅度的提高功能和降低价格,使PLC结构更为紧凑,功能不断增加,将原来大、中型PLC才有的功能移植到小型PLC上,如模拟量处理、数据通讯和复杂的功能指令等,但价格不断下降,真正成为继电器控制系统的替代产品。
(2)向大容量,高速度方向发展
大型PLC采用多微处理器系统,有的采用32位微处理器,可同时进行多任务操作,处理速度提高,特别是增强了过程控制和数据处理的功能。另外,存储容量大大增加。
(3)与计算机联系密切
从功能上看,PLC不仅能完成逻辑运算,且计算机的复杂运算功能在PLC中也进一步得到利用,从结构上看,计算机的硬件和技术越来越多地应用到PLC;从语言上看,PLC己不再是单纯用梯形图语言,而且可用多种语言编程,如类似计算机汇编语言的语句表,甚至可直接由计算机语言编程;在通讯方面,PLC与计算机可直接相连并进行信息传递。
(4)发展多样化
可编程序控制器发展的多样化体现在3个方面:产品类型、编程语言和应用领域。
(5)模块化
PLC的扩展模块发展迅速。功能明确化、专用化的复杂功能由专门模块来完成。主机仅仅通过通讯设备向模块发布命令和测试状态,这使得PLC的系统功能进一步增强,控制系统设计进一步简化。
(6)网络与通讯能力增强
计算机与PLC之间以及各个PLC之间的联网和通讯的能力不断增强,使用工业网络可以有效地节省资源、降低成本、提高系统可靠性和灵活性,致使网络的应用有普遍化的趋势。
(7)多样化与标准化
生产PLC产品的各厂家都在大力度地开发自己的新产品,以求占据市场的更大份额。因此产品向多样化方向发展,出现了欧、美、日多种流派。与此同时,为了推动技术标准化的进程。一些国际性组织,如国际电工委员会(IEC)不断为PLC的发展制定一些新的标准,如对各种类型的产品作一定的归纳或定义,或对PLC未来的发展制定一种方向或框架。
(8)工业软件发展迅速
与可编程序控制器硬件技术的发展相适应,工业软件的发展非常迅速,它使系统应用更加简单易行,大大方便了PLC系统的开发人员和操作使用人员。
可编程序控制器的输出信号类型可以是开关量、模拟量和数字量。输出单元从广义上分包含两部分:一是与被控设备相连接的接口电路,另一部分是输出的映像寄存器。
PLC运行时CPU从输入映像寄存器读取输入信息并进行处理,将处理结果放到输出映像寄存器。输出映像寄存器由输出点相对应的触发器组成,输出接口电路将其由弱电控制信号转换成现场需要的强电信号输出,以驱动电磁阀、接触器、指示灯等被控设备的执行元件。
Applied Materials DAQ Type H AMAT 0090-90967
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Nikon, Part No: 4S001-117 IQB-419NC2-0007 N Model No: PW-NO 4S001-117
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KLA-Tencor AIT 1 Pneumatic Lens it
Nikon STG LIUIF PCB 4S017-866-B
Ashcroft ATE-100 Handheld Calibrator
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Mks Toolweb Sensor Integration Platform. TWSPK005 TWSPK001
Digital M8634 PCB 5015726-01-H2
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KLA-Tencor UI Splitter SP1 PCB 546339 AB
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Applied Materials Cover Quartz 8" EXT Cathode WF AMAT 0200-09244
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Ultratech 910340-801 300mm Chuck Assy 01-18-03722
General Digital Flip-up LCD with Keyboard GDC PN: 90-700-047-B
KLA Tencor PSF Driver Assy. PCB AIT1 356662
KLA-Tencor Illumination Module PCB 369470
KLA-Tencor 200mm Low Contact Chuck AIT 1
Copley Controls Servo Motor Drive Amplifier 800-299A KLA
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KLA-Tencor Robot 4 PCB 710-664601-000
KLA-Tencor PSF Driver Assy PCB 356662 AIT 1
Olympus Microscope Objective UMPlanFI 50x0.80 bd KLA AIT 1
Olympus Microscope Objective UMPlanFI 100x0.90 bd KLA AIT 1
Advantech 1268 UFLA / IPC-6806S Main Control it 2-AE-00081/ SN: CDB0291308
KLA-Tencor Tropel Scan Lens 140315
Baldor Flex Drive FD2A05TR-RN23
CTI-Cryogenics ON-Board P300 Module 8113212G001R
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CTI-Cryogenics On-Board P300 Module 8113212G001
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Prometrix H2 Main Interface PCB 36-020154-0219
Dainippon Heater Control GEBH-001X2
Nikon PRE2 I/O-3 PCB 4S008-064
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Applied Materials Vacuum Control Interlock PCB AMAT 0120-92013
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Applied Materials Kit, Motorized coown servo driver end AMAT 0227-12588
Nikon Wafer Stage Y Axis Mirror
Nikon Wafer Stage X Axis Mirror
Applied Materials Loader/Mainframe Interconnect PCB AMAT 0100-20157
Nikon Power Supply PCB Card 4S001-093
Lambda Switching Power Supply 2B4EB1A-0476
Heidenhain Digital Coter PGM 246 112 08
Fluke 700P06 Pressure Module 100PSIG
Fluke 700P06 Pressure Module 100PSIG
ASAM AFA PREAMP/ ADC 16 BIT PCB 854-8306-008C / 854-7160-003
Edwards active gauge controller. Part No: D3866 1000
Turbovac50 Leyb Turbomolecular Vacuum pump.
Applied Materials 300mm gas interlock PCB AMAT 0100-00581
Asyst Loadport Mini.E Fan
Nikon AIR-CTRL PCB 4S019-140
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Applied Materials PYRO DSP PCB AMAT 0100-00669
Applied Materials Hose ASSY FLEX HELIUM 1/2 IDX72”L STR-F/EL-M SST 3400-00429
Applied Materials Shadow Ring, Quartz 200mm, ch AMAT 0200-10176
Applied Materials i-insert, GDP, Liner, 88 Hole Quartz AMAT 0200-10246
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Applied Materials Main Frame Expansion PCB AMAT 0100-76059
VAT Slit Valve 312543
Applied Materials Insulator Quartz 200mm Simple Cathode AMAT 0200-10073
KLA-Tencor 383015 PSF Driver Board 00383015-000
Edwards: Active Gauge: Ion Gauge Controller AIG-E-B2E Pn: D04847000
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Varian E1000 Dose Control Interconnect PCB E-112730001
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Varian E1000 PCB Assy Status Display D-10191900 Rev 4
High Yield Technology PM-250
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Hitachi LCD1012X Touch Data Monitor BE6138A2
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KLA-Tencor Spare Part 0031127-000
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Agilent HP EPM Power Source Meter E4418B
Applied Materials Lift Plate, MOD. Lift Assy 300MM HDPCVD AMAT 0040-83299
Applied Materials 200MM Screwless BB SUSCEPTOR 8” SCREWLESS, AMAT 0010-03171
KLA-Tencor AIT 1 Mirror Block
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NOVELLUS C2 ALTUS INDEXER END EFFECTOR Part number 15-110374-01 Rev B
Applied Materials Minienvironment Pressure Gauge AMAT 0190-07032-04
Applied Materials Insulating Washer AMAT 0020-09031
MKS ENI PCB 1945-328
Applied Materials SBC I/0 Breakout Board AMAT 0100-09071
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HP Agilent 6641A System DC Power Supply
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x2 Applied Materials DIP294-2 Device Net I/O Block AMAT 9090-00273 ()