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。
Teac 193077C6-28 FD-235HG-C628-U Floppy Disk Drive
Sony MPF920-7 Floppy Disk Drive
IBM Travelstar DARA-206000 07N3673 Disk Drive | with 5.12GB ATA/IDE 2.5" | 5V
Compaq 232431-003 BD07264546 Hard Drive
HP 431954-001 Hard Drive
Quantum CR84A011 Hard Drive
Sanyo Denki 109E4724H4D01 San Ace 172 DC Fan
Samsg MZ-1LW9600 Solid State Drive
SMC XLH-16-X670 3D80-000595-V1 High Vaccum Valve
Sx Panasonic DP2-22Z High-Performance Digital Pressure Sensor
IEI WAFER-9371A-R10 CPU Board ******
Nexcom PEAK550 CPU Board ****
IEI WAFER-E667EV CPU Board ****
Ibase MB896F CPU Board ****
Nexcom NSB 1086 CPU Board ****
Arbor Hicore-i6320 CPU Board ****
IEI JUKI-6770 CPU Board ****
IEI PCIE-9452-R11 CPU Board ****
Trenton 92-005346-0X CPU Board ****
Ibase MB850F CPU Board ****
Advantech CM-486 CPU Board ****
ICS Advent SBC-SCPIII-VE CPU Board ****
Trenton 92-506966-XXX CPU Board ****
Ziatech ZT-8921 CPU Board ****
RadiSys CEGM45T2-T94-AMI COM CPU Board ****
IEI WAFER-C800EV-1G CPU Board
Nexcom EBS 1575P System Embedded Compact System **REPAIR AND EVALUATION ONLY**
NEC HPC-1363A Display Inverter
Hitachi 13G1132 Hard Disk Drive
Pioneer DVR-108 DVD-ROM Drive
Pioneer DVR-K16RS DVD-ROM Drive
Pioneer DVR-K06/1 Slim DVD/DVR Optical Drive
Lite-On LTD-163 DVD-ROM Drive
LITE-ON 5184-4738 CD-ROM IDE Drive
Seagate ST3160815SV Hard Disk Drive
Vitec Multimedia VM-OSD-0210-S Video Card
IBM Travelstar DKLA-23240 03L5550 3GB 2.5-inch Hard Disk Drive
LG Electronics CRD-8322B CD-ROM Drive
LG Electronics GDR-H30N DVD-ROM Drive
LG Electronics GSA-H22N DVD-ROM Drive
Hitachi-LG Data Storage GDR-8162B DVD-ROM Drive
IBM 42C0594 Front Bezel
Sony MPF320-01 Floppy Disk Drive
Burkert U506046 6106-T-5/64-FKM-PA Solenoid Valve
HP 5184-4725 Network Card
Maxtor 2B010H1 Hard Drive
Seagate ST38641A Hard Drive
Teac FD235HFC110 Floppy Disk Drive
Nec NR-7900A CD-R/RW Drive
Mitsumi FX5411M CD-ROM Drive
HP M1059-66501 Telemetry Interface Card
Seagate 9CY011-305 ST380215A Hard Disk Drive
Seagate ST373454FCV 9X5007-042 Hard Drive
Acer 6M.LCKNB.001 Touch Screen
Fujitsu MHT2030AR Hard Disk Drive
Fujitsu MHT2030AR Hard Disk Drive
Dell DH-16D6SH DVD-ROM Drive
Toshiba XM-6102D CD-ROM Drive
Intel 80523PX300512PE Processor
Intel 80523PY400512PE Processor
Hitachi 14R9200 Hard Disk Drive
Teac 193077D2-91 Floppy Disk Drive
Allen-Bradley 1606-XLRED20-30 20-30 Amp Reddancy Module
Hitachi HTE726040M9AT00 14R9200 Hard Disk Drive
SEAGATE STT2401A Hornet 40 Travan-40 ATAPI Internal Tape Drive
DKK-TOA Corporation MBM-100A Electromagnetic Conductivity Analyzer
Dell F8913MID70820 Control Panel
Omron S8JX-N10024C Power Supply
SMC IR-N02 Regulator
SMC IR-N02 Regulator
Dell N375P-00 Power Supply
Maxtor E-H011-02-3427 Hard Disk Drive - DiamondMax Plus 8 ATA/133 HDD 40GB NAR61
Toyo STD12A7HP Brushless Fan
Compaq 011003-003 Mezzanine Card
Daihen CMC-ADP2 Microwave Ting Control Interface
Lexmark E850857FMW Front Display Button Board
Creative Labs MPB-000092 Sod Card
Fujikura RA-TKER-2-1(A) Precision Regulator
HP A7231-66540 Backplane
Jamicon JF06250312AS Fan
Weber AS168X-CB2 H150 Circuit Breaker
Keyence FS2-60 Fiber Optic Photoelectric Amplifier
Omron Automation DCN11N Terminal Block Connector
Dell CN-0PN610 Backplane
Cooper Power Systems 6A00165102 Power Supply Cable
3COM 3C980C-TXM Ethernet Card
Samsg 42T0583 Screen
Supermicro SNK-P0018 Heatsink
Supermicro SNK-P0018 Heatsink
HP 365699-001 BF03688575 3R-A5238-AA Hard Drive
HP 459889-001 36GB Hard Disk Drive
Seagate ST38420A Hard Drive
Seagate 9S1033-508 Hard Drive
Cooljag JACE44C/180 Fan
Orix MU1225S-11X 100V 9.5W Cooling Fan
Orix MU925S-11X Cooling Fan
Oriental Motors RKD507-A Stepper Motor Driver | Microstep Driver
3Com 03-0020-010 Ethernet Card
Hirschmann 932194-112 Industrial Circular Connector
HP L05075-001 Removable Drive Frame and Carrier ASM
iDataPlex BN-MNT-DPX-RLS Moting Kit
Patlite SEFW-D Signal Tower Light
Dell 85840 Cooling Fan
Dell 10-2070-01 Tape Drive
Cooper Power Systems 6A00181502 Voltage Sensing Cable
HP RG5-1891 High Voltage Power Supply for LaserJet 5SI/8000 Printer
Dell 05NVKG Keyboard | Black Laptop Keyboard for Dell Inspiron
Acer 6B.GF3N7.017 Laptop Upper Case With Keyboard
HP M1006A Patient Monitor Module
Dell E1100E-S0 Power Supply
Omron H5CX-AD-N Panel Mot Digital Timer
Omron H5CX-AD-N Panel Mot Digital Timer
Talon MTC-24HF-1-2-S-H 6518-12-01 Flow Through Cap
Sola SDP2-24-100T AC-DC Power Supply
Dell NPS-250KB D Power Supply
Apacer 81.A5CDA.YR02B-A1 Flash Drive
IBM- 69Y4527- Backplane
TDK ZAC2205-00U Noise Filter
Bussmann FRS-600 Fuse
Phoenix Contact 2868635 Power Supply
Fuji Electric BU-GCA3175 Circuit Breaker
MKS 325 MODUCELL Pirani Vacuum Sensor/Transducer
Compaq 689661-004 Ethernet Card
Nec ND-3530A CD-R/RW Drive
Tecate Powerburst 49571-13 Rev A Cache Battery | 13.5V 6.4F
LG CRN-8245B CD-ROM Drive
Teac FD-235HFC291 Floppy Disk Drive
Teac FD-235HFC291 Floppy Disk Drive
Idec HS6B-02 Safety Interlock Switch
3Com 03-0148-000 Network Adapter Card
3Com 03-0148-000 Network Adapter Card