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。

以下链接皆有货

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WESCO TSP_3X_SCR_ND_V2.3 SC003-B3085

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WIKA 1500 Alte-Prestazioni Liquefatto Gas Naturale Manometro

WIKA 1500 Hi-Performance Liquefied Natural Gas Pressure Gauge

Wika 891.01.1998 Tronic Line Differential Pressure Transmitter 10-30VDC 0-250mba

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WIKA Alta Precisione Differenziale Manometro Serie 1500

Wika eco-1 pressure transmitter 4-20ma

Wika High Precision Differential Pressure Gauge Series 1500

Wika tronic-line 891.13.500 pressure transmitter 9013520 10-30vdc

WILDEN WIL-00-9616

WILDEN WIL-02-12277

WILKERSON B18-03-FK00

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WIN SYSTEMS SLCC6BA07

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winstar H2002A rev.q display and controller pc-001 94v-0

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WISETEC WTI-100

WITTENS TEIN LP070S-MF2-25-0D1-3S GEAR HEAD

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WMU SEAGATE WM0599-2099 CONTROLLER

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WONGLOR S80-2M CABLE

WOODHEAD SST-DN3-PCI-2 DN3-PCI-1 V1.2.2

WOODHEAD SST-DN3-PCI-2 DN3-PCI-1-E V1.4.0

WOODHEAD SST-DN3-PCI-2 DN3-PCU-1(E) V1.4.1

WOODWARD | SPM-D | SPM-D10 | SYNCHRONIZING SYSTEM 5448-890

Woodward 2301A Carga Compartir & Control de Velocidad Módulo 8272-286

Woodward 2301A Charging Sharing & Speed Control Unit 8272-286

WOODWARD 2301A LOAD SHARING & SPEED CONTROL MODULE 8272-286

Woodward 3077-474C 8605895 5501-031 D Circuit Module

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WOODWARD 5484-877 PM MOTOR 24VDC 15RPM

Woodward 5484-877Pm 24VDC 15RPM Engine

Woodward 723 digital control 8280-577 Rev  18-40vdc 40Watts

WoodWard 8280-1042 723 Plus Digital Control

Woodward 8280-1042 723 Plus Digitale Controllo

Woodward 8280-154 723 digital control 12052170

Woodward 8280-154 723 Rev G 723 digital control 12052166

Woodward 8280-154 rev  723 digital control 9906-130

Woodward 8290-048 Generator Load Sensor Module Caterpillar

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Woodward 9905-068, low voltage 2301a load sharing & speed control 2k-6k Hz

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Woodward 9905-971 Discrete Input Module 12279349

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WOODWARD 9905-973 LINKNET 8 CHANNEL RELAY MODULE REV E

Woodward 9906-619 723 plus digital control 12219207 Rev A

WOODWARD 9907-028 SPM-A SYNCHRONIZER MODULE REV E

WOODWARD 9907-163 505 TURBINE CONTROL REV M

Woodward D8516-053 Motor 14045798 2400RPM

WOODWARD EGCP-2 8406-120 REV.G DIGITAL CONTROL UNIT

Woodward GCP-30 Genset Control Bundle 8440-1614 Rev F

WOODWARD GCP30 GENSET CONTROL PACKAGE 8440-1613 REV E

WOODWARD GCP-30 GENSET CONTROL PACKAGE 8440-1614 REV D

WOODWARD GCP-30 GENSET CONTROL PACKAGE 8440-1614 REV E

WOODWARD GCP-30 GENSET CONTROL PACKAGE 8440-1614 REV F

WOODWARD GCP-30 GENSET CONTROL PACKAGE 8440-1614 REV J

Woodward GCP-30 Genset Control Paquete 8440-1614 Rev D

Woodward GCP-30 Genset Control Paquete 8440-1614 Rev E

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Woodward LS5-521 Control- 8440-1947 Ls-521-5/P1

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Woodward SPM Synchronizer F8271-609 115-230VAC IMI-922

Woodward UMT1 Measuring Converter 8444-1019 Rev.F

WOODWARD UMT1 MEASURING TRANSDUCER 8444-1019 REV.F

WOODWARD UMT1 MEASURING TRANSDUCERS 8444-1002 REV G

WOONYOUNG WYSP-100S24DP

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