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。
B&R MCE16A-0 CIRCUIT BOARD MCE16A0 REV C0
B&R MCNT33-0 MINICONTROL POWER SUPPLY PSP4/2 MCNT330
B&R MCNT33-0 MINICONTROL POWER SUPPLY PSP4/2 MCNT330
B&R MCNT33-0 POWER SUPPLY MCNT330 REV C0
B&R MCNT33-0 POWER SUPPLY MCNT330 REV C0
B&R MCPZL2-0 CIRCUIT BOARD PZL2/3 MCPZL20
B&R MCPZL2-0 CIRCUIT BOARD PZL2/3 MCPZL20
B&R MCPZL2-0 CIRCUIT BOARD PZL2/3 MCPZL20
B&R MCPZL2-0 CIRCUIT BOARD PZL2/3 MCPZL20
B&R MDA163HOL-0 PC BOARD MDA163HOL0
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
b&r-sutomation NC2C/1 PCB MODULE CARD
BABCOCK & WILCOX 1167756-027 RELAY BOARD 1167756027
BABCOCK & WILCOX 1167756-027 RELAY BOARD 1167756027
BABCOCK & WILCOX 1167756-027 RELAY BOARD 1167756027
BABCOCK & WILCOX 1167756-027 RELAY BOARD 1167756027
BAILEY 6624242A1 CIRCUIT BOARD
BAILEY 6624242A1 CIRCUIT BOARD
BAILEY 6626174C1 ANALOG CONVERTER 6626175E1
BAILEY 6626174C1 ANALOG CONVERTER 6626175E1
BAILEY 6626185F1 PCB CARD 6626184E1
BAILEY 6626185F1 PCB CARD 6626184E1
BAILEY 6632097A1 PC OPTION BOARD ASSY.
BAILEY 6632097A1 PC OPTION BOARD ASSY.
BAILEY BABCOCK & WILCOX 6629881C1 AMPLIFIER PCB MODULE
BAILEY BABCOCK & WILCOX 6629881C1 AMPLIFIER PCB MODULE
BAILEY IC9-50021-073 COMPENSATOR ASSEMBLY PCB 6614723F1
BAILEY IC9-50021-073 COMPENSATOR ASSEMBLY PCB 6614723F1
BAILEY TBI 6634638R1 BOARD
BAILEY TBI 6634638R1 BOARD
BALDOR 10878A PHM CARD2 BRIDGE RECTIFIER
BALDOR 10878A PHM CARD2 BRIDGE RECTIFIER
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
BALDOR MDH4A20TR-RB23 SERVO DRIVE MDII-415V/20A/24V/RES/2CAN I/O
BALDOR MDH4A20TR-RB23 SERVO DRIVE MDII-415V/20A/24V/RES/2CAN I/O
BALDOR PCB EB0095A02 REV A / FAST
BALDOR PCB EB0095A02 REV A / FAST
BALDOR PCB EB0095A02 REV A / FAST
BALDOR PCB EB0095A02 REV A / FAST
BALDOR RELIANCE 0-51811-1 TESTER CARD 0518111
BALDOR RELIANCE 0-51811-1 TESTER CARD 0518111
BALDOR RELIANCE 0-51811-1 TESTER CARD 0518111
BALDOR RELIANCE 0-51811-1 TESTER CARD 0518111
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
BAMBECK SYSTEMS 20215-30 ANALOG DIGITAL I/O BOARD 2021530
BAMBECK SYSTEMS 20215-30 ANALOG DIGITAL I/O BOARD 2021530
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
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 BARBER COLMAN A11844 TEMPERATURE CONTROL CARD
BARBER COLMAN GCMA-114 HOST-LAN CARD NETWORK 8000 GCMA114
BARBER COLMAN GCMA-114 HOST-LAN CARD NETWORK 8000 GCMA114
BARBER COLMAN GCMA-114 HOST-LAN CARD NETWORK 8000 GCMA114
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
BARMAG ELECTRONIC ED285D PC BOARD
BARMAG ELECTRONIC ED285F PC BOARD
BARMAG ELECTRONIC ED285F PC BOARD
BARMAG ELECTRONIC ED472 PC BOARD
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
BARRETT ELECTRONICS DF62011349 PC BOARD 80-7302-R7
BARRETT ELECTRONICS DF62011349 PC BOARD 80-7302-R7
BARRETT ELECTRONICS DF62011349 PC BOARD 80-7302-R7
BARTEC 07-7311-93WPK1NO RS485 PROFIBUS KOPPLER 235813
BARTEC 07-7311-93WPK1NO RS485 PROFIBUS KOPPLER 235813
BARTEC 27-2551-2620 SPACE HEATER 110V 200W (OPEN BOX)
BARTEC 27-2551-2620 SPACE HEATER 110V 200W (OPEN BOX)
BASLER ELECTRIC 90 17709 001C PCB CARD 90 17709 112
BASLER ELECTRIC 90 17709 001C PCB CARD 90 17709 112
BASLER ELECTRIC 90 17709 001C PCB CARD 90 17709 112
BASLER ELECTRIC 90 17709 001C PCB CARD 90 17709 112
Basler Electric DECS125-15-b1C5 V 2.0.7 DECS 125-15-b1C5 V 2.0.7 DECS125-15-S1C5
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
Basler Electric DECS125-15-b2C1 V 2.0.9 DECS 125-15-b2C1 V 2.0.9 DECS125-15-S2C1
BASLER ELECTRIC SR4A-2B16B3A STATIC VOLTAGE REGULATOR
BASLER ELECTRIC SR4A-2B16B3A STATIC VOLTAGE REGULATOR
BAUER CONTROLS 1700-008 CIRCUIT BOARD REV.A 1700008
BAUER CONTROLS 1700-008 CIRCUIT BOARD REV.A 1700008
BAUER CONTROLS 1700-008 CIRCUIT BOARD REV.B 1700008
BAUER CONTROLS 1700-008 CIRCUIT BOARD REV.B 1700008
BAUER CONTROLS 9210-091 HALL EFFECT BOARD 1700-034 9210091
BAUER CONTROLS 9210-091 HALL EFFECT BOARD 1700-034 9210091
BAUER CONTROLS 9210-091 HALL EFFECT BOARD 1700-034 9210091
BAUER CONTROLS 9210-091 HALL EFFECT BOARD 1700-034 9210091
BAUER CONTROLS 9210-091 HALL EFFECT BOARD 1700-034 9210091
BAUER CONTROLS 9210-091 HALL EFFECT BOARD 1700-034 9210091
BAY CONTROLS 7010-14 ANALOG OUTPUT BOARD REV B 701014
BAY CONTROLS 7010-14 ANALOG OUTPUT BOARD REV B 701014
BAY CONTROLS 7010-14 ANALOG OUTPUT BOARD REV B 701014
BAY CONTROLS 7010-4 CPU BOARD REV C 70104
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