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。
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DV2-144NCD2 / DELTA SOLENOID VALVE 60AIRPSI, 50 H2P PSI, 1/4NC ORIFICE, 24VDC
NZMH 6-63 / CKT BREAKER 40-63A, 3 POLE KM / MOELLER
G6B-4BND WITH G6B-1114P-FD-US / 5A 24VDC, 5A 250VAC, 5A 30VDC, 5A 250VAC / OMRON
625-4540410 / ROFIN SINAR LASER5-94.138 0 PCB PLCD / ROFIN-BAASEL, INC
194341A-01 / 16-CHANNEL ANALOG INPUT BOARD PCIM-DAS16JR/16 / ECI TECHNOLOGY
ENEC441-21 / LAN SERIAL CONVERTER SIO I-F IT, DC24V, 160MA / ALGO
1005003 / MACROILLUMINATION HELIUM LAMP POWER SUPPLY, NIKON 9500697 / PRMS INC.
84FBGA / POGO PIN SOCKET / TSE
N3S010 / VALVE SOLENOID MANIFOLD WITH 17 N3S010 / CKD
90-105480A51 / PCB CASSETTE INTERFACE / ASM AMERICA INC
MAC998F B / PCB MSD02B FBPCB-0381 581B291C / PANASONIC
3161011 / PCB, TIME-PURGE, 7800 SERIES / KOKUSAI SEMICONDUCTOR EQUIPMENT
0992-70276 / GRID, CHAMBER / AXCELIS TECHNOLOGIES
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ST122VGAU / 2 PORT VGA AUTO SWITCH / STARTECH
559256 / MICROSCOPE OBJECTIVE NPL FLUOTAR 20X/0.45 / LEITZ WETZLAR
91019-01 / VERSATEST TEST SITE CONTROLLER / HP
0020-18270 / FLANGE O-SEAL, THV HDP-CVD / APPLIED MATERIALS AMAT
0020-19002 / FLAPPER-SLIT VALVE ANODIZED, DOOR SLIT VALVE / AMAT
198-335-849 / 63 TAPER TUBE SK31,1500-15000,63 DN 50 335 / GEORGE FISCHER
112989 / PCB,112990,41726001 / ESI
0050-33961 / FORELINE / APPLIED MATERIALS AMAT
0040-02661 /BRACKET,FILTER LATCH ASSY,HT DPS /APPLIED MATERIALS AMAT
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1624A0033 / SERVO MOTOR 3500 EXT/RET ROBOT / FAULHABER
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162-02-009 / CONTROL THERMOCOUPLE / ATMI
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1168460 / PROXIMITY SWITCH ASSY / AXCELIS TECHNOLOGIES
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714-000547 / LAM 590 GAS BAFFLE / LAM RESEARCH
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440115 / BRAIDEDHOSE, NW25, 48"LG, MED.WALL,KFRL-100-48F2 / MDC VACUUM PRODUCTS
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0240-76690 / KIT, SPACER MODIFIED SHIELD 8" G-12 HARD / APPLIED MATERIALS AMAT
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715-250717-001 / BAF, TOP, UPPER ELCTD, 150MM / LAM
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17233330 / LINER, VG-MAGNET DUCT / AXCELIS TECHNOLOGIES
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788-240033-300 / SFC2481FABD2 MC-4SAGTBL DIGITAL MFC CH3F / SAM FANTAS
788-300015-10L / SFC2481FABD2 MC-4SAGTBL DIGITAL MFC / SAM FANTAS
788-630001-500 / 2480G1 MC-AGT0BL1 DIGITAL MFC MASS FLOW CONTROLLER / SAM FANTAS
788-630010-500 / 2480G1 MC-AGT0BL1 DIGITAL MFC / SAM FANTAS
788-630015-020 / 2480G1 MC-AGT0BL1 DIGITAL MFC 20SCCM / SAM FANTAS
788-630019-500 / SAM MFC 248G1 MC-AGT0BL1 C12 500 SCCM / SAM FANTAS
788-630033-010 / 248G1 MC-AGT0BL1 DIGITAL MFC / SAM FANTAS
788-630049-300 / 2480G1 MC-AGT0BL1 DIGITAL MFC 300SCCM / SAM FANTAS
788-630108-100 / SAM MFC 2470G1 MC-AGT0BL1 100 SCCM / SAM FANTAS
2-103-004() / SENSOR IDI LIQUID LEVEL, KAS-80-30-IL-M32 / FSI
17110151 INA / 14264 UPD TO 17133810 ELECTRODE GROD / AXCELIS TECHNOLOGIES
15-00745-00 / FTG,PORT / NOVELLUS
SR25-2P-N-00699609 / TEMP CONTROL / CANON
QCGF1015 / CIRCUIT BREAKER / WESTINGHOUSE
321-4-X-24DFO / CON TUBING 1/4 DO 24"L FVC / CON JUBING
PSE-A127848161 / PNEUMATIC SEQUENCER ENTRY, EXIT MODULE / PARKER
372-72254 / SCHRADER BELLOWS, BORE NFPA TIE ROD CYLINDER / SCHRADER
7426AC / AMP, LINEAR MOTOR DRIVER / COPLEY CONTROLS CORP
100-C37*00 / CONTRACTOR OR CONTROL RELAY / ALLEN-BRADLEY
2-A14626-01 /WATLOW THERMOCOUPLE AU / HITACHI
839-250568-001 / BELLOWS LOWER ELECTRODE / LAM
0021-76845 / CARRIER, UPPER, WXZ / APPLIED MATERIALS AMAT
CWUZ0S0P1 / TEL FILTER, SD2 / ENTEGRIS
110494-003 / TI-O / PROLOG
853-034395-001 / ASSY, OPT, SNSR LFTR STRPR / LAM RESEARCH
851-5095 / HIGH VACUUM VALVE LAB, 2-WAY /VARIAN
0060.0.173A / VME BAKPLANE 7 SLOTS BUS 183 PCB BOARD,166555-4 21-91/ LEUKHARDT
002-7287-02 / ASSY, VACNITROGEN SOLENOID ALD ATM ROBO / BROOKS AUTOMATION
BD4-3847 / CANON I3 ND MICROSCOPE FILTER HOUSING / CANON
310991 / PWB ASY 200ACU UTILITY / AXCELIS TECHNOLOGIES
UXL-S150MO/KL / LAMP XENON 150W 5200XP / USHIO
CDI CPU-9E / PCB COMMICATIONS CPU-9 / CDI, INC
SSC01A4B8C5S / SOLID SENSE PRESSURE XDUCER / MILLIPORE
CT023-001770-1W0298() / BELT, TIMING, 2790-3GT-15 / TOKYO ELECTRON TEL
1517300 / PCB, CMP2000 INTERFACE / AXCELIS EATON
PC2-4200E-444-12-A0 / DDR2 533 CL4 ECC / CRUCIAL TECHNOLOGY
032-A4-NV46-SX / GEFORCE2 MX400 AGP / NVIDIA
E15001400 / AIR PRESSURE SENSOR / VARIAN
020-91-215-4/ION ANALYSIS COMBO GLASS ELECTRODE-SGJ 6.0233.100/ BRINKMANN
0140-23720 / HARNESS ASSY LOADCUP WFR PRESENCE SW ADA/ APPLIED MATERIALS AMAT
SGMPH-01AAE41 / AC SERVO MOTOR W100 V200 A.89 / YASKAWA ELECTRIC
E17384260 / APERTURE HORIZONTAL EXIT LONG TOP / VARIAN
FS-N12P / SENS, FIBER OPTIC AMP MEI, BLACK OUT 24V 20MA / KEYENCE CORP. OF AMER.
PK268-02B / STEPPING MOTOR 2-PHASE / VEXTA
SBC3386EX / MICRO SYS ANALOG GROD ISOLATION PCB10116D / FIRST TEN ANGSTROMS
0140-08504/ HARNESS ASSY, MANIFOLD OVERTEMP, 300MM T / AMAT
0-521-899 / MINI MOTOR WITH ENCODER / HENGSTLER
SGDG-04GT F / SERVOPACK, 90-253VAC 1PH 5.5A 3PH 3AMP0.4KW 3W1446-1 / YASKAWA
853-017964-030 / TCU TO RF INTERFACE CART CABLE 80C A/8/ LAM RESEARCH
601650 /PCB, MR8-16 RELAY OUTPUT BOARD /REAL TIME DEVICES RTD
013872 / ASSEMBLY ANALOG I-O CARD / DATRICON
FBPCB-0173 / PCB, 8-DI, COMM / DISCO
0063840-001 / DISCRETE I-O BACKPLANE BOARD ASSY D006341 / HK SYSTEMS
90869-1-1 / AMRAY ASSY SIX INCH MOTOR STAGE CONTROLLER PCB 800-0292D / AMRAY
01-W3336B / MVME 316 MODULE BOARD / MOTOROLA
KD259169 / PARKER, SERIES S AIR CYLINDER / PARKER
STP-BG9-4942-000 / PCB INLINE IN/OUT ASSY / NIKON
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