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。
HONEYWELL BOARD 4DP7APX0D311 (F) INPUT MODULE
HONEYWELL BOARD 4DP7APX0D411
HONEYWELL BOARD 4DP7APX0D411
HONEYWELL BOARD 4DP7APX0D411
HONEYWELL BOARD 4DP7APX0D411
HONEYWELL BOARD 4DP7APX0D411
HONEYWELL BOARD 4DP7APX0D411
HONEYWELL BOARD 51109336-100
HONEYWELL BOARD 51109336-100
HONEYWELL C7027A 1049 ULTRAVIOLET FLAME DETECTOR SENSOR 50052243-004 REV.B
HONEYWELL C7027A 1049 ULTRAVIOLET FLAME DETECTOR SENSOR 50052243-004 REV.B
HONEYWELL C7027A 1049 ULTRAVIOLET FLAME DETECTOR SENSOR 50052243-004 REV.B
HONEYWELL CSLA2CD CURRENT SENSOR
HONEYWELL CSLA2CD CURRENT SENSOR
HONEYWELL DC1040 TEMPERATURE CONTROLLER DC1040CR-301000-E
HONEYWELL DC1040 TEMPERATURE CONTROLLER DC1040CR-301000-E
HONEYWELL FE-LC1-C LOGIC CARD FELC1C
HONEYWELL FE-LC1-C LOGIC CARD FELC1C
HONEYWELL FMA-1 CIRCUIT BOARD FMA1
HONEYWELL FMA-1 CIRCUIT BOARD FMA1
HONEYWELL FMA-2 CIRCUIT BOARD FMA2
HONEYWELL FMA-2 CIRCUIT BOARD FMA2
HONEYWELL FMF1 CONTROL BOARD
HONEYWELL FMF1 CONTROL BOARD
HONEYWELL FML4 PC BOARD
HONEYWELL FML4 PC BOARD
HONEYWELL FMT2 PC BOARD
HONEYWELL FMT2 PC BOARD
HONEYWELL ITOH DENKI HB-510BN-IT7.1 HYBRID DRIVER CARD 23225400 HB510BNIT71
HONEYWELL ITOH DENKI HB-510BN-IT7.1 HYBRID DRIVER CARD 23225400 HB510BNIT71
HONEYWELL LEEDS & NORTHRUP 078691 CONTROL BOARD
HONEYWELL LEEDS & NORTHRUP 078691 CONTROL BOARD
HONEYWELL LEEDS & NORTHRUP 078691 CONTROL BOARD
HONEYWELL LEEDS & NORTHRUP 078691 CONTROL BOARD
HONEYWELL LEEDS & NORTHRUP 078691 CONTROL BOARD
HONEYWELL LEEDS & NORTHRUP 078691 CONTROL BOARD
HONEYWELL MC-TAMT04 SOLID STATE ANALOG BOARD 51305890-175 MCTAMT04
HONEYWELL MC-TAMT04 SOLID STATE ANALOG BOARD 51305890-175 MCTAMT04
HONEYWELL MEASUREX 05334900 PC BOARD REV.E
HONEYWELL MEASUREX 05334900 PC BOARD REV.E
HONEYWELL MEASUREX 05334900 PC BOARD REV.E
HONEYWELL MEASUREX 05334900 PC BOARD REV.E
HONEYWELL MEASUREX 05334900 PC BOARD REV.E
HONEYWELL MEASUREX 05334900 PC BOARD REV.E
HONEYWELL MEASUREX 053676-00 ANALOG TO DIGITAL CONVERTER BOARD 05367600
HONEYWELL MEASUREX 053676-00 ANALOG TO DIGITAL CONVERTER BOARD 05367600
HONEYWELL MEASUREX 054005-02 TERMINATION BOARD 05400502
HONEYWELL MEASUREX 054005-02 TERMINATION BOARD 05400502
HONEYWELL MEASUREX 05405900 VIDEO PRINTER PROCESSOR BOARD Q6P63
HONEYWELL MEASUREX 05405900 VIDEO PRINTER PROCESSOR BOARD Q6P63
HONEYWELL MEASUREX 05405900 VIDEO PRINTER PROCESSOR BOARD Q6P63
HONEYWELL MEASUREX 05405900 VIDEO PRINTER PROCESSOR BOARD Q6P63
HONEYWELL MEASUREX 054080 BOARD
HONEYWELL MEASUREX 054080 BOARD
HONEYWELL MEASUREX 054080 BOARD
HONEYWELL MEASUREX 054080 BOARD
HONEYWELL MEASUREX 05408000 TEMPERATURE CONTROLLER CARD
HONEYWELL MEASUREX 05408000 TEMPERATURE CONTROLLER CARD
HONEYWELL MEASUREX 05408000 TEMPERATURE CONTROLLER CARD
HONEYWELL MEASUREX 05408000 TEMPERATURE CONTROLLER CARD
HONEYWELL MEASUREX 101138-01 PC BOARD REV.B 10113801
HONEYWELL MEASUREX 101138-01 PC BOARD REV.B 10113801
HONEYWELL MEASUREX 101139-01 PC BOARD REV.B 10113901
HONEYWELL MEASUREX 101139-01 PC BOARD REV.B 10113901
HONEYWELL MEASUREX 101140-01 PC BOARD 10114001
HONEYWELL MEASUREX 101140-01 PC BOARD 10114001
HONEYWELL MEASUREX 101140-01 PC BOARD 10114001
HONEYWELL MEASUREX 101140-01 PC BOARD 10114001
HONEYWELL MEASUREX RS-485 TERMINATION BOARD ASSY 053733
HONEYWELL MEASUREX RS-485 TERMINATION BOARD ASSY 053733
HONEYWELL MICROSWITCH FE-LC3-BB LOGIC CARD FELC3BB
HONEYWELL MICROSWITCH FE-LC3-BB LOGIC CARD FELC3BB
HONEYWELL MPA155 LOGIC CARD
HONEYWELL MPA155 LOGIC CARD
HONEYWELL OTB122 EXCLOSURE JUNCTION BOX 00789-A-0100
HONEYWELL OTB122 EXCLOSURE JUNCTION BOX 00789-A-0100
HONEYWELL POIM11 BOARD 51301255, 51301256-100, 51301255-100
HONEYWELL POIM11 BOARD 51301255, 51301256-100, 51301255-100
HONEYWELL SCC-V3 MODULE CARD 65878844
HONEYWELL SCC-V3 MODULE CARD 65878844
HONEYWELL SEIGER 05701-A-0361 ENGINEERING CARD ISS.06 / 05701A0361
HONEYWELL SEIGER 05701-A-0361 ENGINEERING CARD ISS.06 / 05701A0361
HONEYWELL SPSTAXH3 ZAREBA H2S SENSEPOINT w/ SIRA06ATEX3185X/IECEXSIR05.0069 BOX
HONEYWELL SPSTAXH3 ZAREBA H2S SENSEPOINT w/ SIRA06ATEX3185X/IECEXSIR05.0069 BOX
HONEYWELL V065C-1 PC BOARD V065C1
HONEYWELL V065C-1 PC BOARD V065C1
HONEYWELL V065C-1 PC BOARD V065C1
HONEYWELL V065C-1 PC BOARD V065C1
HONEYWELL VO65C- SCR SHORTING BOARD REV. C 206531 VO65C
HONEYWELL VO65C- SCR SHORTING BOARD REV. C 206531 VO65C
HONEYWELL XCD IR & FL POWER CP-M05-1043(FL)4912 PCB REV 6 / FAST
HONEYWELL XCD IR & FL POWER CP-M05-1043(FL)4912 PCB REV 6 / FAST
HONEYWELL XCD IR & FL POWER CP-M46-1755(FL)3213 PCB REV 06 / FAST SHIP
HONEYWELL XCD IR & FL POWER CP-M46-1755(FL)3213 PCB REV 06 / FAST SHIP
HONSBERG FF-015GR004S-1 FLOW SWITCH 06SN007277
HONSBERG FF-015GR004S-1 FLOW SWITCH 06SN007277
HOPE CO LTD PC80H ELECTRONIC PCB CARD
HOPE CO LTD PC80H ELECTRONIC PCB CARD
HOPE CO LTD PC80H ELECTRONIC PCB CARD
HOPPE 08.96 HOP_I01B PCB MODULE HOP-I-01A
HOPPE 08.96 HOP_I01B PCB MODULE HOP-I-01A
HOPPE BMT LS10_02A LS1_C02A POSITION INDICATOR HOPAC-CL PCB CARD
HOPPE BMT LS10_02A LS1_C02A POSITION INDICATOR HOPAC-CL PCB CARD
HOPPE PCB CIRCUIT BMT LP AH_NT01C
HOPPE PCB CIRCUIT BMT LP AH_NT01C
HORNER AUTOMATION PCBOCS0004 DISPLAY PCB CARD
HORNER AUTOMATION PCBOCS0004 DISPLAY PCB CARD
HORNER AUTOMATION PCBOCS0004 DISPLAY PCB CARD
HORNER AUTOMATION PCBOCS0004 DISPLAY PCB CARD
HOSE MCCANN HMUM-HSIS-30 PUBLIC ADDRESS HORN 30W
HOSE MCCANN HMUM-HSIS-30 PUBLIC ADDRESS HORN 30W
HOSE MCCANN HMUM-HSIS-30 PUBLIC ADDRESS HORN 30W
HOSE MCCANN HMUM-HSIS-30 PUBLIC ADDRESS HORN 30W
HOSE MCCANN UM-ASTM-7002 TERMINAL CCA PCB
HOSE MCCANN UM-ASTM-7002 TERMINAL CCA PCB
HOSHIZAKI PULSTEC H2AA136 / H2DA372H23 CONTROLLER MICROCOMPUTER BOARD PCB
HOSHIZAKI PULSTEC H2AA136 / H2DA372H23 CONTROLLER MICROCOMPUTER BOARD PCB
HOSHIZAKI PULSTEC H2AA136 / H2DA372H23 CONTROLLER MICROCOMPUTER BOARD PCB
HOSHIZAKI PULSTEC H2AA136 / H2DA372H23 CONTROLLER MICROCOMPUTER BOARD PCB
HOTTINGER BALDWIN MESSTECHNIK ME50 AMPLIFIER CARD 603.02-2129 260891 K
HOTTINGER BALDWIN MESSTECHNIK ME50 AMPLIFIER CARD 603.02-2129 260891 K
HOUSTON DIGITAL INSTRUMENTS 07290-W023899-101644 PCB
HOUSTON DIGITAL INSTRUMENTS 07290-W023899-101644 PCB
HP 2746A B94D2746 N3536 BNC CARD
HP 2746A B94D2746 N3536 BNC CARD
HP HT03XL RECHARGEABLE LI-ION BATTERY L11421-1C3
HP HT03XL RECHARGEABLE LI-ION BATTERY L11421-1C3
HP INC. C6074-60361 MAIN LOGIC PC BOARD C607460361
HP INC. C6074-60361 MAIN LOGIC PC BOARD C607460361
HP INC. C6074-60361 MAIN LOGIC PC BOARD C607460361
HP INC. C6074-60361 MAIN LOGIC PC BOARD C607460361
HP INC. C6074-60361 MAIN LOGIC PC BOARD C607460361
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