福建中立恒自动化设备有限公司
一、摘要 PLC是一种专门在工业环境下应用而设计的数字运算操作的电子装置。
它采用可以编制程序的存储器,用来在其内部存储执行逻辑运算、顺序运算、计时、计数和算术运算等操作的指令,并能通过数字式或模拟式的输入和输出,控制各种类型的机械或生产过程。PLC及其有关的外围设备都应按照易于与工业控制系统形成一个整体,易于扩展其功能的原则而设计。在工业生产的各个领域,机械加工企业为了提高生产效率,采用机械化流水作业的方式,对不同类型的零件分别组成的自动生产线。随着产品机型的更新换代,生产线承担的加工对象也随之改变,这就需要改变控制程序,使生产线的机械设备按新的工艺过程运行,而继电接触器控制器系统是采用固定接线,很难适应这个要求。大型自动生产线的控制系统使用的继电器数量很多,随着PLC的应用日益普及,其使用方法简单,便于掌握,且可靠性,抗干扰性很强,自身具有完善的功能.模块化的结构,使其在工业生产线上的应用越来越广泛。
发展趋势:1.向高速度、大容量方向发展
为了提高PLC的处理能力,要求PLC具有的响应速度和更大的存储容量。目前,有的PLC的扫描速度可达0.1ms/k步左右。PLC的扫描速度已成为很重要的一个性能指标。
在存储容量方面,有的PLC可达几十兆字节。为了扩大存储容量,有的公司已使用了磁泡存储器或硬盘。
2.向超大型、超小型两个方向发展
当前中小型PLC比较多,为了适应市场的多种需要,今后PLC要向多品种方向发展,特别是向超大型和超小型两个方向发展。现已有I/O点数达14336点的超大型PLC,其使用32位微处理器,多CPU并行工作和大容量存储器,功能强。
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CLEVELAND MACHINE CONTROLS MO-04919 DANCER CARD MO04919
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CLEVELAND MOTION CONTROLS MPA-09035 ADJUSTABLE SPEED DRIVE MPA09035
CLIMATRONICS 100087 TEMPERATURE TRANSLATOR BOARD 400170
CLIMATRONICS 100163 CONTROL CARD
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CLIMATRONICS 100829 PC BOARD
CLIMATRONICS 100829 PC BOARD
CLIMATRONICS 101035 REV. X SIGMA CARD
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CLIMATRONICS 101035 REV. X SIGMA CARD
CLIMATRONICS 101035 REV. X SIGMA CARD
CLIMATRONICS 400171 WIND TRANSLATOR BOARD 100163-G9-J1 F-460
CLIMATRONICS 400171 WIND TRANSLATOR BOARD F-460
CLIMATRONICS 400171 WIND TRANSLATOR BOARD F-460
CLIMATRONICS CORPORATION 400589 CIRCUIT BOARD REV H 100779
CMC B41-5790B CIRCUIT BOARD B415790B
CMC B41-5790B CIRCUIT BOARD B415790B
CML-011 2 PCB CARD 32004126 REV D
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CNI AX483/B BOARD S726
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COFFIN WORLD WATER HSPB0053 PCB BOARD 2504BE2V-0
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COIL TECHNOLOGY CB-5101M PROCESSOR BOARD CB5101M
COIL TECHNOLOGY CB-5101M PROCESSOR BOARD CB5101M
COIL TECHNOLOGY XC1116-1 CONTROL CARD XC11161
COIL TECHNOLOGY XC1116-1 CONTROL CARD XC11161
COLE PARMER B-2176-1 DISPLAY BOARD B21761
COLE PARMER B-2176-1 DISPLAY BOARD B21761
COLORADO MEMORY SYSTEMS 026-328 JUMPERLESS TAPE CONTROLLER REV. B
COLT INDUSTRIES M1756-U50670 PC INTERFACE BOARD M1756U50670
COLT INDUSTRIES M1756-U56286 PC BOARD M1756U56286
COLT INDUSTRIES M1756-U56286 PC BOARD M1756U56286
COLT INDUSTRIES M1756-U56286 PC BOARD M1756U56286
COLT INDUSTRIES M1756-U56286 PC BOARD M1756U56286
COLT INDUSTRIES M1756-U56363 PROCESSOR BOARD M1756U56363
COMMANDER 400 ENGINE PROTECTION PCB L9596-1 / FAST SHIP DHL OR FEDEX
COMMANDER SNUBBER L9572-1 ARC 010599 PCB / FAST SHIP DHL OR FEDEX
COMMTECH LCI-1-0 PCB BOARD MODULE LCI10
COMMTECH LCI-1-0 PCB BOARD MODULE LCI10
COMMTECH LCI-1-0 PCB BOARD MODULE LCI10
COMMTECH LCI-1-0 PCB BOARD MODULE LCI10
COMMTECH LCI-1-0 PCB BOARD MODULE LCI10
COMMTECH LCI-1-0 PCB BOARD MODULE LCI10
COMPUMOTOR 61-001528-02 SERVO BOARD 6100152802
COMPUMOTOR 61-001528-02 SERVO BOARD 6100152802
COMPUTER AUTOMATION 73-53526-08C-23 PC BOARD 735352608C23
COMPUTER DYNAMICS PIO-48/64 C PC BOARD PIO4864C
COMPUTER DYNAMICS PIO-48/64 C PC BOARD PIO4864C
COMPUTER DYNAMICS PIO-48/64-D PC BOARD PIO4864D
COMPUTER DYNAMICS PIO-48/64-D PC BOARD PIO4864D
COMPUTER POWER GROUP STD4100 PC BOARD 4100
COMPUTER POWER GROUP STD4100 PC BOARD 4100
COMPUTER PRODUCTS 510094 POWER SUPPLY BOARD REV D MC1368B
COMPUTER PRODUCTS NAN25-7612 POWER SUPPLY UNIT 514807 REV E
COMPUTER PRODUCTS PM542 PC BOARD
COMPUTER PRODUCTS PM542 PC BOARD
COMTROL H0XX5016A HOSTESS 550 16-PORT CIRCUIT CARD
CONAIR 107-299-01 DISPLAY BOARD REV.A 10729901
CONAIR 107-299-01 DISPLAY BOARD REV.A 10729901
CONAIR 108-521-04 PC BOARD 10852104
CONAIR 108-521-04 PC BOARD 10852104
CONAIR 108-891 TIMING BOARD 108891
CONAIR 108-891 TIMING BOARD 108891
CONAIR EB17DRY PC MEMORY BOARD
CONAIR EB17DRY PC MEMORY BOARD
CONAIR EB17DRY PC MEMORY BOARD
CONAIR EB17DRY PC MEMORY BOARD
CONNECT CONTROLLER CARD PCB 65827 DFLEX2-4 REV B / FAST SHIP DHL OR FEDEX
CONSILIUM AKK-2 REV RIB PCB CARD
CONSILIUM AKK-2 REV RIB PCB CARD
CONSILIUM AKK-2 REV RIB PCB CARD
CONSILIUM MARINE 754E-K PCB 754EK
CONSILIUM MARINE 754E-K PCB 754EK
CONSILIUM MARINE 754E-K PCB 754EK
CONSILIUM MARINE 754E-K PCB 754EK
CONSILIUM MARINE 754E-K PCB 754EK
CONSILIUM MARINE 754E-K PCB 754EK
CONSILIUM MARINE 759G PCB 759-G
CONSILIUM MARINE 759G PCB 759-G
CONSILIUM MARINE SWM-761BS-B PCB 761BS-B
CONSILIUM MARINE SWM-761BS-B PCB 761BS-B
CONSILIUM PCB BDP-1 5100425-00 REV A03 / FAST SHIP DHL OR FEDEX
CONSILIUM PCB BOARD CS-LOOP M H 6303445 A3 / FAST SHIP DHL OR FEDEX
CONSILIUM SALWICO CS3000 GPM-4 R3 FIRE DETECTION PCB CARD
CONSILIUM SALWICO CS3000 GPM-4 R3 PCB CARD
CONSILIUM SALWICO CS3000 GPM-4 R3 PCB CARD
CONSILIUM SALWICO CS3000 GPM-4 R3 PCB CARD
CONSILIUM SALWICO CS3000 GPM-4 R3 PCB CARD
CONSILIUM SALWICO MCP-A MANUAL CALL POINT 5200031-01A