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
WHITE KNIGHT METAL-FREE PTFE/PFA PNEUMATIC CHEMICAL/ACID PUMP, SHUTTLE, 116827
WHITE KNIGHT METAL-FREE PTFE/PFA PNEUMATIC CHEMICAL/ACID PUMP, SHUTTLE, 116828
WHITEY SS-6NRS6 STAINLESS STEEL NEEDLE VALVE
Whiting Smartwash 25HP 5KVA 3PH Pump Control Panel
Whittenstein NP 005S-MF1-10-1B1-1S Planetary Gear Box 10:1
Wide Angle Float Switch 125154-20 20ft 230V
WIDIA CARBIDE DRILL 412834-001429 K20F-DCF, 7-9/16" OAL, COOLANT THRU
WIDIA DRILL VDS403A08733 WU25PD DIA 8.733
WIDIA HANITA 4K0319077B END MILL 3 FLUTE 3/4 X 3/4 X 1-1/2 X 4 0.7DIA 4" OAL
WIDIA HANITA END MILL TC4K1325078 1 X 1 X 2-1/4 X 5 TICN-CT SC FIN 3FLUTE
WIDIA HANITA END MILL TC620525008 M42 RUF 5FL 1X1X2X4-1/2
WIDIA HANITA SOLID CARBIDE DRILL VDS402A10100 WU25PD DIA 10.10 MM 4142825
WIDIA HANITA SOLID CARBIDE DRILL VDS403A0800 WU25PD DIA 8.00 4143824
WIDIA HANITA TC621832009 END MILL, 1.2SHANK DIA M42 RUF 6FL 1-1/4X1-1/4X6-1/2
WIDIA SOLID CARBIDE DRILL VDS402A10800 WU25PD DIA 10.80 MM 4142842
Wiedmuller Terminal Block Assembly AEA494/A 0031401399
WIEGMANN BN4100804CH Enclosuresr,Mtlc,10In.Hx 8In.Wx4In.D
WIEGMANN CAT NO. B161406CH
Wiegmann Hubbell Disconnect Enclosure SDN12362510 Sealed 36x25x10 Nema 12
Wieland Bamberg WEB Module 60.220.603.S
Wieland R1.190.1210.0 samosPRO Compact Module SP-COP2-EN-A Security Control
Wieland samosPRO SP-COP2-EN-C | Safety Controller F-04.01 | R1.190.1220.0
Wieland samosPRO SP-COP2-ENI-C | Safety Controller G-07.01 | R1.190.1320.0
WIKA 50233572 / 50233572 3000 PSI Gauge
Wika Vapor Thermometer 100-350 BHI 10313631 20 ft lead
Wilkerson CB6-02-000 (No Metal Casing) E78
WILKINS ZURN ELECTRONIC SOLENOID TIMER EST 120 VOLT BACKFLOW PREVENTER
WILLY VOGEL 122 049 301, LUBRICATOR LUBE TANK,
Wilo Circulating Pump Stratos 25/1-6 | 2090447/2022W05
WILO FU2830 | 2027634 | Frequency Inverter
WILSON PRESS BRAKE TOOL 50250L 75 DEGREES TIP RADIUS .123.2MM 70LBS 36" OAL
WILSON PRESS BRAKE TOOL 50266L 75 DEGREES TIP RADIUS .250" 6.4MM 70LBS 36" OAL
WILWOOD SUPERLITE AG 120-4033 RS DISC BRAKES JR33 5.96 "L" BRAKE CALIPER
WILWOOD SUPERLITE JF 12-4Q31 RS DISC BRAKES JR33 5.96 "R" BRAKE CALIPER
Win-Mil IGM FMB300 Multibore Head Universal Support
Winsmith 913MDN Gear Reduction Box Speed Reducer Gearbox
Winsmith 913MWT Gear Speed Reducer 40:1 .25HP 1750RPM 913MWTS21000FA
WINSMITH 920MDSF ,WINSMITH 920MMSFS41140B7 GEAR REDUCER
WINSMITH 926XWUS2X000FA SPEED REDUCER RATIO 40:1, INPUT HP 1.12
Winsmith 930CDTE D90 Type SE Speed Reducer, Ratio 15:1 1750 RPM 3.02 HP NOS
Winsmith Gear Reducer E17MDSS51160BT 56C
Winsmith Gear Reducer E20MSFS32160B7 10:1 2.24 HP 1750RPM S90
Winsmith Gearbox Angle E17MDNS31000A8 5:1 2.69HP
Winsmith,E20MSFS41140B7 Gear Reducer
WIR310K Fafnir Single Row Ball Bearing
WIRE GUARD SYSTEMS INC JUNCTION & PULL BOX 667K 12"X18"X24" TYPE 1, ITEM A
WIRE GUARD SYSTEMS INC JUNCTION & PULL BOX 667K 12"X18"X24" TYPE 1
Wire mold 6CFFTCBK Poke-Thru Surface Style Cover, Black, Furniture Feed
Wiremold 837C 3 Gang Brass Carpet Flange 880 Series Floor Box
WIREMOLD WALKER LEGRAND 837T NONMETALLIC 3-GANG TILE FLANGE OBX SERIES, BRASS
Wirewound Power Resistor 41742 129 OHM 9505
with OMRON P2CF-11-600 Base Old Stock
WITH SOCKET OLD STOCK
Wittenstein Alpha Alphira 080-1 Gearbox 10012179
Wittenstein Alpha HG+060S-MF2-50-6B1-1S10 HG+ Hypoid Transmission 1020-1375
WITTENSTEIN LP 090S-MF1-7-1G1-3S GEAR BOX (137890 - )
WITTENSTEIN SK+060S-MF1-7 |-1E1-1K00 Planetary Transmission
Wittenstein Transmission LPK070-M03-70-111
Wittenstein transmission SPK+140S-MF3-100-1E1-1S11 i=100
Wittur System Drive Technology Servo Motor DUM4-11.3-20R.93-9LA | 06120762
WOHNER 31130 / 31130 ( ) Box Of 12 Lot Of 12 Fuse Holder
WOHNER 31132 FUSE HOLDER 690V Din Rail Lot Of 6
Wohner 32472 Busbar Adapter 80 Amp 600V for EQUES 60 Classic System
WOHNER BUSBAR ADAPTER 32137 250 Amp
Wohner fuse block 31961 dual
WÖHRLE ANKA AV3-240-09-300 plain text display C 0.1
Wöhrle control panel/operating terminal CR15TCK | CR15TCK***00011 | L2-108 | V:B0.04
WOODHEAD / MOLEX 50 Amp 3P CS81W64 1301550148 Watertight Connector
WOODWORTH THREAD PLUG GAGE 2-1/4-12N-3, NO GO PD 2.2007, MERCURY GO PD 2.1959
WOODWORTH THREAD PLUG GAGE 2-3/4-10NS-3, GO PD 2.6850, NO GO PD 2.6919
WOODWORTH THREAD PLUG GAGE 3-1/2-10NS-3, GO PD 3.4350, NO GO PD 3.4424 NPCC
WORCESTER CONTROLS PNEUMATIC ACTUATOR 25-39-SN-R6 SERIES 39 60/120PSIRR
WORCESTER PNEUMATIC ACTUATOR T VALVE 1 1/2 3039SN6R6 SER 39 120PSIRRANT
Work Engineering Board 101-0269-01 PK2230 EC W/Plug Conn NOS
WORK LIGHT 12V 55W, PARTS
WORK LIGHT ASSEMBLY REMOVED
WORK LIGHT, PARTS
WORKHOLDING COLLET CHUCK A6-16C, A6 SPINDLE NOSE 16C COLLET
WORLD ENCODER PENANT HAND HELD PULSER HPG-C1-P4R-AV5-S3-A No Cord
Z-World SBC230A PC Board
WORLDWIDE ELECTRIC MOTOR 213T FRAME WWE7.5-18-213T 7.5HP 1760RPM 3PHRRA
WORLDWIDE ELECTRIC WPMDC12-18-180V-56CB MOTOR 3/4 HP 180V 1800RPM
Worldwide Motor PEWWE3-36-182TC 3HP 3 Phase
WPC 800-175-00 Video Interface NOS A9
WPH HMPW3-32X32X HYDRAULIC PUMP PZ3-25-7.302A
WRIGHT-WAY ELECTRIC CHAIN HOIST 1000LBS
WS DEAD CENTER WITH NUT, 6-3/4" OAL
WT9-2P441 Sick Photoelectric Sensor Switch
WTC 902-1301R GEN 6 MFDC Line voltage 350-500VAC Power Line
WTC IGBT UNIT W105-131A 168KVA 480V 50/60HZ RESISTANCE INVERTER W105-T46AAR
Wuekro training module W4710-0A incl. Siemens S7-300 CPU 314IFM
X-AXIS BALL SCREW ASSEMBLY 26" OAL
X-AXIS BALL SCREW ASSEMBLY APPROX 29" OAL, PARTS
X-AXIS BALL SCREW ASSEMBLY APPROX OAL 22.5", FR AGIE CUT SPRINT 70 EDM AGIECUT
X-AXIS BALL SCREW ASSEMBLY WITH SCHNEIDER MDRIVE23 MDI4MRQ23C7-EQ MOTOR + DRIVER
X-AXIS BRAKE, PARTS
X-AXIS WAY COVER, PARTS
Xertex 502T000120F Sensall Control Transmitter
XFB-050 50A 600V HFD3050L Explosion Proof Enclosed Breaker Disco
XP Power F7E1A6G2 Power Supply 10005836
Xtralis VLS 700 VESDA Laser Scanner Air Sampling Smoke Detector honeywell
XTREME 66262HDN ALTERNATOR,
XY Stage Table Custom Design Surface Panel Measurement Solar Cell Window, 100791
XYCarb Ceramics XYA-790072-04 Upper Dome, Ring, 118187
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