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。
以下链接皆有货
NIKON LARLDRV 4S007-398- BOARD
Nikon Lens AF NIKKOR 28mm 1:2.8
Nikon Lens AF NIKKOR 50mm 1:1.4D
NIKON LIA-I/F3,4S007-583-ⓑ BOARD
NIKON LS-LINK2 4S017-956- BOARD
Nikon MCR-CNTRL2, 2S005-228-3, 2S0052283,
Nikon MCR-DRV, 2S003-056-1, 4S003-056-1, #1168Z1
NIKON MIC-CONT1 (HISAO) 4S701-089,4S014-141AN
Nikon MIC-I/F, 4S003-058-A, 2S003-041-A, 2S003-041-MIC-I/F, #1532F
Nikon MIC-ISA, 2S014-066, 2S014-066-MIC-ISA, S14002-1002A,
NIKON MTH-10M 4S019-079 BOARD
NIKON OP OPSP OPD-CTRL RACK, 4S017-587- L4-OP-MTR
NIKON OPTICS FILTER
NIKON OPTICS FILTER ,LENS
NIKON ORC BOARD A01-0080CPBF
NIKON ORC BOARD A01-0090A
NIKON ORC BOARD A01-0265BPBF
NIKON ORC BOARD A01-0273PBF PB-F
NIKON ORC BOARD A01-0274BPBF PB-J & A01-0274BPBF PB-H & A01-0274BPBF PB-I
Nikon P# KAB11050/3201A-0, 2S017-450-SW-I/F1, 2S701-475 Ship same day
NIKON PELCL 30146-1 A,30146-1A BOARD
NIKON PK864 MODULE 4S003-115 EXXFLT3 BOARD PDM 705HC
NIKON PLSDRIVE BOARD 4S017-608 REE
NIKON PPD-CPU 4S015-068 4S017-912-A BOARD, ,FOR PARTS
Nikon PREARI CCD, 2S005-229, 2S005229, With 2-3 Days Shipping #M5
Nikon PREARI CCD, 4S005-343, 4S005343, With 2-3 Days Shipping #M5A
NIKON REG.UNIT,LC.RL.AR,450322-003 POWER SUPPLY
NIKON REG.UNIT 3,RA.PA.JP,560664-003 POWER SUPPLY
NIKON REG.UNITST,552265-001 POWER SUPPLY
NIKON REG.UNIT4 PL EPL,+5V,+15V,-15V,+24V POWER SUPPLY
NIKON REMOTE NK852 4S015-002,REMIFC 4S013-347-1, L5-RM-MTR 4S017-840
NIKON ROBOT Z-12M-OR1201,[NIKKI DENSO NSR-REMP1A-10,CAMERA]
NIKON SRC SVB-20B EAGLE BACKPLANE BOARD & SRN-EAGLE[2EA]
NIKON SRC VME SVB-15SVA SYSTEM BUS BOARD
NIKON SR-EX3 BOARD 4S017-489-2 B
NIKON STEPPER AC 100V SYSTEM POWER BOX,MAIN,PLATE LOADER,INTERFEROMETER
NIKON SW-I/F1, KAB11050/3201A-0, 4S018-533, 4S701-546, #1532B
NIKON VS5A-600R ,VH5R-B POSITION SCALE
NIKON X7IP-DSP MTT DSP8067A Spec.A VME BOARD
NIKON X7IP-DSPM MTT DSP8067A VME BOARD
NIKON X7PC-HSL HSL-A 4S019-663 HSL-CMC-A 4S019-664 BOARD
NIKON X7PC-LMD 429200-890BD X120D10102 HSL-CMC-A 4S019-664 BOARD
NIKON YRA058,MINIMOTOR SA 22/2K 54.6:1 054,2251R012S
NIL-COR 6.610XP
NILFISK 140 7024 000 ANTI STATIC BOARD FOR 930 SERIES - LOT OF
NILFISK 1407026500 2-SPEED CIRCUIT BOARD 220-240V
NILFISK ALTO 1119195 REP.KIT F. VALVE SYSTEM
NILIGHT2GANG ROCKER/ SWITCH PANEL AND (1) USB CHARGER VOLMETER FOR BOATS 12V
NION TC03-C05-1465A 13.5-32
NIPPEN DT-36M VAF MULTIFUNCTION METERPHASEWIRE
Nipple Reducer NW63 X 13.3125" L, with Cross NW16 & NW40, SST,
NIPPON BEARING Slide Bush Bushings, SMK20GUU, 7, #1560P5
NIPPON CHEMI-CONN CAPACITOR 36DA 95°C 4700 UF 63V 9808L48, 31
NIPPON CONTROL KOGYO VS-4GN SOLENOID PUMP 100V-OA-104090
NIPPON ELECTRIC FAN ANEMOMETER & VANE WIND SPEED INDICATOR
NIPPON ELECTRIC INSTRUMENT NEI 934671 FAN ANEMOMETER AND WIND VANE 2~60m/s 100V
NIPPON HAKUYO ODA1310-1HN DRIP PROOF WALL TYPE MARINE TELEPHONE
NIPPON HAKUYO ODA-1380-1HN MARINE TELEPHONE
NIPPON HAKUYO ODC-2380-1 MARINE TELEPHONE 976156
NIPPON OIL COMPANY MDL SERIES CASSETTE TESTER FOR MEASURING PROPERTIES OF OIL
NIPPON OIL PUMP CO TOP-330H-4-I-0-30 RBLT
NIPPON OIL PUMP CO TOP-N350H
NIPPON PILLAR Bellows Pump Controller PB-10
NIPPON PISTON RING (NPR) # SWG10005ZY FOR GM FIT FOR VRTC48, 53 0.75
NIPPON TMS-1-01 4S-258-041 SENSOR
Nippon Tokushu Sokki Digital Indicator NTS-4830
NIPPON TOP-1ME75-1-12MAVB EELQ-8T 200/220V 0.60/0.57A
NIPPON TOP2MY7FELQ-8T
NIPRON eNSP3-450P-S25-H0V POWER SUPPLY
NIPRON PCSA-470P-X2S POWER SUPPLY
NIRECO MZ5220.0 PCB CARD ELECTRIC BOARD
NIRECO TC900V TENSION CONTROLLER
NIRECO TENSION CONTROLLER TC 240 BOARD,MZ1184.3 WITH MZ1185.4
NISSEI ELECTRIC KBEX-102 ART8(5)-50-MO ILLUMINATOR, SONY CCD XC-ES
NISSEI GTR HFMN-15R-20-T25 3PH INDUCTION MOTOR
NISSEI LIGHT BOX KBEX-102 AR12-50-M0
NISSEI LIGHT BOX KBEX-102 ART8[5]-50-M0
NISSEI MOTOR GTR GFM-18-50-T90 GFM1850T90
NISSIN MT-3000A THERMO PILOT 7
NISYS NTG-3000 SuNAM NEOS-200 POWER ON
NITTA NT15-8JC01
NITTO FM502HN-1, FM502HN1, CONTROL BOARD PROGRAMMABLE, #1170M4
NITTO KOHKI HI-CUPLA 30SM STEEL QUICK CONNECT COUPLING
NITTO KOHKI HI-CUPLA 40SF STEEL QUICK CONNECT COUPLING
NITTO SCREWGUID HOLDER 1968, 1773091-A00, 1773091A00, #1224B16
NITTO SEIKO SD100R,SD100R-CU20A CONTROLLER
NITTO SEIKO SD100R,SD100R-CU20AJ CONTROLLER
NITTO SEIKO SD500,SD510-CU20C-03 DRIVE CONTROLLER
NITTO SEIKO SD500R,SD500R-CU20A CONTROLLER
NITTO SEIKO SD500R,SD510R-CU20A CONTROLLER
NITTO SEIKO SD500R,SD510R-CU20A-0 CONTROLLER
NITTOSEIKO RSA0050A0FFR50010010R FLOWMETER SIZE MM
NITTOSEIKO RSA0080A0FFR53450010R FLOWMETER SIZE 80 MM
NITTOSEIKO SSA0100A0FBR6 FLOWMETER SIZE 100 MM
NK GK048174 SPB-ADAPT VER.1 BASE PLATE
NKA919000,MANUAL ANGLE VALVE NW25:JDV-1,HELIUM LEAK
NKE AT-H500 Board PB-0720-A
NKE PNEUMATIC CYLINDER LU30-25-HC, LU3025HC, LU3025, #1633C
NKS 3177044 DUPLEX PRESSURE GAUGE FOR CARGO PUMPS - NAGANO KEIKI
NKS DRIVER, 200V , M-ESB-YSB4080ABA00, MESBYSB4080ABA00,
NKS Nagonokeiki Pressure Gauge 20 KPa, GL25-133, GL25133,
NLIGHT PEARL P4-080-0808-3-D-R01 LASER ASSEMBLY,AS PHOTOS
NMB Digital Indicator CSD-815
NMC PCI NMX-SBP011(RA59-01270B) BOARD
NOB ELEKTRONIK MK405992 PCB CARD
NOBEL FIRE SYSTEMS - IIIS FIRE SUPPRESSION CONTROL PANEL
Nohau Augat Cable SF250-062A0-162 & POD-752, #1225AG
Nohau Augat Cable SF250-062A0-B2 & EMUL 31-PC, #1225AE
NOHKEN FP-1A LEVEL SWITCH AC 250V 10A
NoiseCom DNG7500 Digital Noise Generator 500 KHz to 70 MHz
NoiseCom PNG9804 Programmable Noise Generator, 100MHz to 3.25GHz 03420224
NoiseCom Satellite Channel Simulator /Fading Emulator
NoiseKen ESS-2000 ESS0584406 ESD Electrtostatic Discharge Simulator
NON-ROOF PENETRATING FINIAL BASES BB3B5
NOR CONTROL HA445838A WATCH CALLING UNIT
NORBAR TORQUE TOOLS 18038 78LBF/SQ.IN 3300LBF/FT 4REVS/MIN
NORBAR TORQUE TOOLS 4500 63LBF/SQ.IN 3300LBF/FT 4REVS/MIN
Nor-Cal Angle Valve Conflat 2.75" WithVCR 1/4" Port, 74653KE, 267116, #1231A5
Nor-cal BVM-1002-NW, Ball Valve, BVM1002NW, #110Q
NOR-CAL Flexible Hose ISO-100 x 18", Medium Wall SS, FH-400-18-2ISO,
NOR-CAL Flexible Hose ISO-100 x 6" Length, 2FC-ISO-400-4,
Nor-Cal Manual Angle Valve 1-1/3 CF, ESV-0752-CF, LOT O F2, #156B
NOR-CAL PENDULUM VALVE NC-95-PP,0190-17435,MISSING CONTROLLER,,
NOR-CAL PENDULUM VALVE NC-95-PP,PRODUCTS 0190-17434
NOR-CAL Pneumatic angle valve NW-25, JVAP-1002-NWB, #129B9
NOR-CAL Pneumatic Bellows Sealed SS Inline Valve, 2.75" CF, SL0150PVCF
NOR-CAL PRODUCTS ANGLE VALVE ESVP-0752-NWB-KT
NOR-CAL PRODUCTS ANGLE VALVE ESVP-2502-ISO-K79
NORCONTROL AUTOMATION NA1120 PICKUP SYSTEM HA331975B/B/B
NORCONTROL NA1117 MOTHERBOARD II HA220853B
NORCONTROL NN 801 DIGITAL IN/OUTPUT ADAPTER + NN 803ANALOG OUTPUT - SET OF 2