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。
MP FILTRI IN-LINE FILTER LMP-100-2-BHAG-3
FASCO 208/230V 3/4-1/3HP 1075RPM (2 SPD) MOTOR D930
FACTORY AUTHORIZED PARTS 1/8HP 1050/3RPM MOTOR HC-35CE-266
SMC PNEUMATIC MANIF VV5Q41-0803TT0
KAMYR ANDRITZ COUPLING 1011386-Z011152
WESTINGHOUSE 4.8kV 200A CLE-1 FUSE 310C095G18
FANUC POWER SUPPLY BOARD A16B-1000-0170/05B
ROSEMOT REMOTE FLOW TRANSMITTER RFT97121PN
MINUTEMAN 16" POLY GRIT REPLACEMENT BRUSH 430111
FAG DEEP GROOVE BALL BEARING 6222ZR
TOL-O-MATIC DUAL LINEAR SLIDE BLOCK CYLINDER 341247 HB24-SK04-LB
SMC BOOSTER REGULATOR VBA20A-F03
ALLEN-BRADLEY 3-PHASE LINE REACTOR 1321-3R45-C
NEXEN NIRECO HORTON TENSION METER TM140D
DYNACORP CLUTCH/BRAKE CONTROL BOARD 215242
VALMET METSO NELLES AUTOMATION NCU2 PCB A413016 REV. 09
VALMET METSO NELLES AUTOMATION NCU2 PCB A413016 REV. 08
VALMET METSO NELLES AUTOMATION NCU2 PCB A413016 REV. 12
INTERNATIONAL POWER MACHINES BOARD REV.B 941-012-D027-1
ASCO TRI-POINT PRESSURE TEMPERATURE SWITCH SB10A
AQUASOL OXYGEN MONITOR PRO OX-100
SIGNATURE 150-900PSI PRESSURE TRANSMITTER 2408-10B-612-111-110-A030
AQUASOL OXYGEN MONITOR PRO OX-100X NEEDS TO BE RE-CALIBRATED
RELIANCE ELECTRIC POWER MOD INTERFACE 0-57408-B
HONEYWELL I/O REDDANT MODULE 621-9938R
ALLEN-BRADLEY 110/120V COIL CONTACTOR 100-C60*00
HONEYWELL PRESSURETROL PRESSURE CONTROL L91A-1136-2
GE GENERAL ELECTRIC 115V PNEUMATIC TIME DELAY RELAY CR2820B120AA2
ASCO 125DC SOLENOID VALVE HC8316A64
BROWNING 26 TEETH SPROCKET H120R26
FEDERAL SIGNAL 12-24VDC RED STROBE LIGHT FB2PST-012-024R
ABB HT VS250B VOLTAGE SENSOR 1SBT160250R0001
GE PNEUMATIC TIME DELAY RELAY CR2820B110AA4K
MINARIK 115/230VAC 1PH 13A MOTOR CONTROLLER MC10
HITACHI SEIKI IC CONTROL BOARD 10-128F IO-128F 07-02-05-00 SMCN-3B
HITACHI SEIKI IC CONTROL BOARD 10-128F IO-128F 07-02-03 SMCN-2B
SIMPSON 0-300 AC VOLT VER. 3 SINGLE SET POINT CONTROLLER 3344
BROWNING TORQ/GARD TORQUE LIMITER T35LX1
ALLEN-BRADLEY SAFETY SWITCH 802C-J57M18BG
OMEGA HUMIDITY TEMP TRANSMITTER HX303C
ASHCROFT DIAPHRAGM SEAL SB300YV02T
FURNAS SIZE STARTER 22FS32A*E6 W/ 48FC31AA3
FLUKE HARRIS TEC DC DRIVE BOARD 9000-1140 1036748
INA NEEDLE ROLLER BEARING NA4917-XL
BENTLY NEVADA 3300 XL 8MM CABLE EXTENSION 330130-040-00-00
IFM FLOW MONITOR SI8518
ALLEN-BRADLEY COMPACT I/O 6 CHANNEL RTD INPUT MODULE 1769-IR6
1 ALLEN-BRADLEY COMPACT I/O 6 CHANNEL RTD INPUT MODULE 1769-IR6
YASKAWA CIRCUIT BOARD JASP-NS117 DF0300531-A0 REV. A
ALLEN-BRADLEY SER. A DC OUTPUT MODULE 1756-OB32
1 ALLEN-BRADLEY SER. A DC OUTPUT MODULE 1756-OB32
ROYAL WESTCOAST CYLINDER L25R8.5C2A1C1AU
AMERICAN AUTOGARD TORQUE LIMITER T200
GROVE GEAR 15:1 GEAR REDUCER BM0218-3
PFP COMPRESSOR AIR FILTER 532426 PFP1428AOS
SAO ELECTRIC 112A .66mH TRANSFORMER UZDC-MG
TOLOMATIC GEAR 02260200
TOLOMATIC GEAR 02780200
CRAVEN DUPLOMATIC STYLUS # 420A
ALLEN-BRADLEY HEAVY DUTY PUSH BUTTON STATION 800H-2HAR4R
ASHCROFT 100PSIG 10-36VDC IN 4-20MA OUT TRANSDUCER K17M0242C1100
BASLER ELECTRIC TRANSFORMER BE-32228-001-I14-0834
STERLING 1750RPM .814HP 20:1 GEAR REDUCER 2175BQ020563M
STERLING ELECTRIC 1750RPM 20:1 .814HP GEAR REDUCER 2175BQ020562B
AEG MODICON ANALOG INPUT MODULE AS-B875-001
GENUINE SKF ANGULAR CONTACT BEARING 3311 ENR/C3
ROYAL WESTCOAST CYLINDER LH32TR4.5C1A2H1.2A
ROYAL WESTCOAST CYLINDER L32TR6C1A1C1A
ROSS PNEUMATIC AIR CONTROL VALVE 2783A2003
FRANCE 7-19/32 CHANNEL CAST IRON COMPRESSOR VALVE 67A
BROTHER 1/15HP 10:1 RATIO INDUCTION MOTOR HF18R010-BMRF6CX
BROWNING PULLEY SHEEVE 18XHQ300
GENUINE SKF DEEP GROOVE BALL BEARING 6318/C3
FALK 1090T HUB 3.3750 BORE 7/8 X 7/16 KW 0710935
DODGE TAKE-UP SIDE MOT BEARING SXV-1-15/16 461135
POSITRON 4-WIRE DATA ISOLATOR MODULE 7501-24
DARRAH ELECTRIC WELDING MODULE D09ST18JB
ALLEN-BRADLEY REPLACEMENT BOARD 154959 154958 1336-MOD-G2
SQUARE D 230/240VDC DC CONTACTOR COIL 51019-056-50
HYDAC BETAMICRON FILTER ELEMENT 1253106
REXROTH SOLENOID VALVE R978017736
PARTIAL ROLL BELDEN 7.25lbs 26 CONDUCTOR RIBBON CABLE 9L28026-008-H300
KKLE 1-1/2" 110GPM RELIEF VALVE 0020-G01-MG
DONGAN 120VAC IGNITION TRANSFORMER A06-SA6
DONGAN 120VAC IGNITION TRANSFORMER A06-SA6
SICK SAFETY LIGHT CURTAIN FGSS-750-211
SICK SAFETY LIGHT CURTAIN FGSE-750-211
MRC DOUBLE ROW ANGULAR CONTACT BEARING 5218M
TIMKEN TAPERED ROLLER BEARING 74550
VS1MX .5HP VARIABLE SPEED DRIVE VS1MX20P5-4
FANUC SERVO MODULE GRAPHIC CPU BOARD A20B-2900-0351
GENERAL ELECTRIC GE INTERFACE BOARD 93X527ABG01
MINSTER TIME DELAY CIRCUIT BOARD 491-0323
HITACHI IC OPERATIONAL AMPLIFIER BOARD 651-11 331WM51661
HITACHI IC OPERATIONAL AMPLIFIER BOARD 652-15 331WM51662 AOA-01
FOXBORO CHANNEL ISOLATED I/A SER. MODULE FBM204
BUHLER 1 ST EBE 4007 1 MEGA MEMORY GBB CIRCUIT BOARD EKH-20061-01
NORDSON GLUE G HEAD 153010S
SERVO GEAR MOTOR BSM1R-01-40-B5
RADISYS CONVERTER MODULE 61-0152-02 EXM-20
RADISYS EXPANDED MEMORY MODULE 61-0215-10 EXM-MX80
MEASUREX SIXTEEN CHAIN AIP PC BOARD 053493-00
SIGNET SCIENTFIC FLOW METER P58440-0-80
PIAB VACUUM PRODUCTS 58-87 PSI CLASSIC VACUUM PUMP M50B6ADN
GENERAL ELECTRIC DLC AIR INTERFACE MODULE IC3600DLIJ1
GENERAL ELECTRIC CIRCUIT BOARD IC3600VDAD1A1B
GENERAL ELECTRIC CONTROL BOARD IC3600SFKG1A
GENERAL ELECTRIC CONTROL BOARD IC3600SVDE1B1B
PARKER R-GLAND KIT HMI 70MM GP 1/6 RG2HM0701
ASCO 120/110V SOLENOID VALVE 8340A3MO
HUBBELL 30A 3P 600V WATERTIGHT PLUG HBL430P5W
ALLEN-BRADLEY FEEDBACK PCB BOARD 2361-SPM01A
SIEMENS MOORE CIRCUIT BOARD 16161-223/1 78843-9003-96074001194
FANUC CIRCUIT BOARD A20B-3300-015
EATON DYNAMATIC POWER SUPPLY BOARD AF5000 15-871-2
OKUMA CIRCUIT BOARD E4809-045-109-E
ALLEN-BRADLEY OPERATING HANDLE 194R-HM4E
ALLEN-BRADLEY OPERATING HANDLE 194R-HM4E
FISHER 70-87 DIAPHRAGM VALVE 29130902202-21"
FANUC CIRCUIT BOARD A20B-1002-0180/05A
EXAIR CABINET COOLER 250PSIG-AIR 6R23
SQUARE D STARBAR HEATING ELEMENT 20.20X08.0X0.75
FANUC CIRCUIT BOARD A20B-2002-0521/07A
FANUC CIRCUIT BOARD A20B-2002-0520
SICK CONTRAST SENSOR NT6-03022
ALLEN-BRADLEY POWERFLEX 525 3HP AC DRIVE 25B-D6P0N104
ALLEN-BRADLEY POWERFLEX 525 2HP AC DRIVE 25B-D4P0N114
1 ALLEN-BRADLEY POWERFLEX 525 2HP AC DRIVE 25B-D4P0N114
IN PLASTIC HONEYWELL MEASUREX PLASMA DISPLAY BOARD 05330200
ZEBRA CRADLE CHARGER STB3678-C100F3WW
EDMD INDUSTRIAL OPTICS 75MM DOUBLE GAUSS LENS 46091
ALLEN-BRADLEY 6 CH ISOLATED FEED-THROUGH MODULE 1492-AIFM6S-3