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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B&R MCPZL2-0 CIRCUIT BOARD PZL2/3 MCPZL20
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B&R MDA163HOL-0 PC BOARD MDA163HOL0
B&R MDA163HOL-0 PC BOARD MDA163HOL0
B&R MDA163HOL-0 PC BOARD MDA163HOL0
b&r-sutomation NC2C/1 PCB MODULE CARD
b&r-sutomation NC2C/1 PCB MODULE CARD
b&r-sutomation NC2C/1 PCB MODULE CARD
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BAILEY 6624242A1 CIRCUIT BOARD
BAILEY 6626174C1 ANALOG CONVERTER 6626175E1
BAILEY 6626174C1 ANALOG CONVERTER 6626175E1
BAILEY 6626185F1 PCB CARD 6626184E1
BAILEY 6626185F1 PCB CARD 6626184E1
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BAILEY 6632097A1 PC OPTION BOARD ASSY.
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BAILEY TBI 6634638R1 BOARD
BALDOR 10878A PHM CARD2 BRIDGE RECTIFIER
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BALDOR 10878A PHM CARD2 BRIDGE RECTIFIER
BALDOR 10878A PHM CARD2 BRIDGE RECTIFIER
BALDOR 10880A-001 PC BOARD PHM CARD1 10880A001
BALDOR 10880A-001 PC BOARD PHM CARD1 10880A001
BALDOR 10880A-001 PC BOARD PHM CARD1 10880A001
BALDOR 10880A-001 PC BOARD PHM CARD1 10880A001
BALDOR 10880A-001 PC BOARD PHM CARD1 10880A001
BALDOR 10880A-001 PC BOARD PHM CARD1 10880A001
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BALDOR PCB EB0095A02 REV A / FAST
BALDOR PCB EB0095A02 REV A / FAST
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BALDOR RELIANCE 0-51811-1 TESTER CARD 0518111
BALDOR RELIANCE 0-51811-1 TESTER CARD 0518111
BALDOR RELIANCE 0-51811-1 TESTER CARD 0518111
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BALDOR VE0667A00 SERVO DRIVE
BALDOR VE0667A01 SERVO DRIVE
BALDOR VE0667A01 SERVO DRIVE
BALDOR VE0667A02 SERVO DRIVE
BALDOR VE0667A02 SERVO DRIVE
BALDOR VE0667A03 SERVO DRIVE
BALDOR VE0667A03 SERVO DRIVE
BAMBECK SYSTEMS 20215-30 ANALOG DIGITAL I/O BOARD 2021530
BANCROFT 18001-A TIMER BOARD 18001A
BANCROFT 18001-A TIMER BOARD 18001A
BANNER ENGINEERING MGA-TBA5-1 TERMINAL BOARD 34068 MGATBA51
BARBER COLMAN 33-1058-1 MEMORY BOARD 3310581
BARBER COLMAN 33-1058-1 MEMORY BOARD 3310581
BARBER COLMAN 33-1129-2 PC BOARD 3311292
BARBER COLMAN 33-1129-2 PC BOARD 3311292
BARBER COLMAN A-11009-1 PC BOARD A110091
BARBER COLMAN A-11009-1 PC BOARD A110091
BARBER COLMAN A-11463-1 PC BOARD A114631
BARBER COLMAN A-11463-1 PC BOARD A114631
BARBER COLMAN A-12037-2-1 PC BOARD A1203721
BARBER COLMAN A-12037-2-1 PC BOARD A1203721
BARBER COLMAN BARBER COLMAN A11844 TEMPERATURE CONTROL CARD
BARBER COLMAN GCMA-114 HOST-LAN CARD NETWORK 8000 GCMA114
BARMAG ELECTRONIC ED283C CIRCUIT BOARD
BARMAG ELECTRONIC ED283C CIRCUIT BOARD
BARMAG ELECTRONIC ED285D PC BOARD
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BARMAG ELECTRONIC ED285F PC BOARD
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BARMAG ELECTRONIC ED472 PC BOARD
BARMAG ELECTRONICS E003-39-OF PC BOARD E00339OF
BARMAG ELECTRONICS E003-39-OF PC BOARD E00339OF
BARMAG ELECTRONICS E003-39-OF PC BOARD E00339OF
BARMAG ELECTRONICS E003-39-OF PC BOARD E00339OF
BARMAG ELECTRONICS E003-39-OF PC BOARD E00339OF
BARMAG ELECTRONICS E003-39-OF PC BOARD E00339OF
BARRETT ELECTRONICS DF62011349 PC BOARD 80-7302-R7
BARTEC 07-7311-93WPK1NO RS485 PROFIBUS KOPPLER 235813
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Basler Electric DECS125-15-b1C5 V 2.0.7 DECS 125-15-b1C5 V 2.0.7 DECS125-15-S1C5
Basler Electric DECS125-15-b2C1 V 2.0.9 DECS 125-15-b2C1 V 2.0.9 DECS125-15-S2C1
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BAUER CONTROLS 1700-008 CIRCUIT BOARD REV.A 1700008
BAUER CONTROLS 1700-008 CIRCUIT BOARD REV.B 1700008
BAUER CONTROLS 9210-091 HALL EFFECT BOARD 1700-034 9210091
BAY CONTROLS 7010-14 ANALOG OUTPUT BOARD REV B 701014
BAY CONTROLS 7010-4 CPU BOARD REV C 70104