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。
UNICO 322404 CIRCUIT BOARD 0079-ADMV C0383.J.07
UNICO 322404.000 CIRCUIT BOARD 403-182
UNICO 322404.000 CIRCUIT BOARD 403-182
UNICO 322712.015 CIRCUIT BOARD 318493.010 317241.009 322404.000 402-877
UNICO 322712.015 CIRCUIT BOARD 318493.010 317241.009 322404.000 402-877
UNICO 322712.015 CIRCUIT BOARD 318493.010 317241.009 322404.000 402-877
UNICO 322712.015 CIRCUIT BOARD 318493.010 317241.009 322404.000 402-877
UNICO 322712.015 CIRCUIT BOARD 322404.000 322712015 402-877
UNICO 322712.015 CIRCUIT BOARD 322404.000 322712015 402-877
UNICO 322712.015 CIRCUIT BOARD 402-877 318493.010 317241.008 322404.000
UNICO 322712.015 CIRCUIT BOARD 402-877 318493.010 317241.008 322404.000
UNICO 322712.E16 CIRCUIT BOARD 318493.010 317241.009 322404.000 402-877
UNICO 322712.E16 CIRCUIT BOARD 318493.010 317241.009 322404.000 402-877
UNICO 322713.003 CIRCUIT BOARD 403-343
UNICO 322713.003 CIRCUIT BOARD 403-343
UNICO 322713.007 CIRCUIT BOARD 403-343
UNICO 322713.007 CIRCUIT BOARD 403-343
UNICO 323946.000 CIRCUIT BOARD 402-877 318493.010 317241.008 322404.000
UNICO 323946.000 CIRCUIT BOARD 402-877 318493.010 317241.008 322404.000
UNICO 323946.003 CIRCUIT BOARD 317241.008 322404.000
UNICO 323946.003 CIRCUIT BOARD 317241.008 322404.000
UNIFIRE PCB CARD FOR00124 / FAST BY DHL OR FEDEX
UNIFIRE PCB CARD FOR00124 / FAST BY DHL OR FEDEX
UNILOC 3000604-H PC BOARD 3000604H
UNILOC 3000604-H PC BOARD 3000604H
UNILOC 33000603-C PC BOARD 3000603C
UNILOC 33000603-C PC BOARD 3000603C
UNILOC 33000603-C PC BOARD 3000603C
UNILOC 33000603-C PC BOARD 3000603C
UNION SPECIAL RM6438 CIRCUIT BOARD
UNION SPECIAL RM6438 CIRCUIT BOARD
UNISYS 32739682 MOTOR / LAMP CONTROL BOARD
UNISYS 32739682 MOTOR / LAMP CONTROL BOARD
UNISYS 32742272-011 PC BOARD REV.S 3274 1829-002 32742272011
UNISYS 32742272-011 PC BOARD REV.S 3274 1829-002 32742272011
UNISYS 39865589 PC BOARD
UNISYS 39865589 PC BOARD
UNISYS 39865589 PC BOARD
UNISYS 39865589 PC BOARD
UNISYS 39865589 PC BOARD
UNISYS 39865589 PC BOARD
UNISYS 41422460 POCKET DRIVER PC BOARD 2434-8796
UNISYS 41422460 POCKET DRIVER PC BOARD 2434-8796
UNISYS 41422460 POCKET DRIVER PC BOARD 2434-8796
UNISYS 41422460 POCKET DRIVER PC BOARD 2434-8796
UNISYS 41422460 POCKET DRIVER PC BOARD 2434-8796
UNISYS 41422460 POCKET DRIVER PC BOARD 2434-8796
UNISYS 41426651-003 AC CONTROL LOGIC PC BOARD 4142S644 41426651003
UNISYS 41426651-003 AC CONTROL LOGIC PC BOARD 4142S644 41426651003
UNISYS 41428715 CPU BOARD DP1000
UNISYS 41428715 CPU BOARD DP1000
UNISYS 43279173-001 MASTER CONTROL PCB 3274 4591-001 43279173001
UNISYS 43279173-001 MASTER CONTROL PCB 3274 4591-001 43279173001
UNISYS 4327-9868-005 BACKPLANE DUAL IMAGE 13 SLT PCB 43279868005
UNISYS 4327-9868-005 BACKPLANE DUAL IMAGE 13 SLT PCB 43279868005
UNISYS 43281401-003 TURBO JPEG PC BOARD 4328-1401-003
UNISYS 43281401-003 TURBO JPEG PC BOARD 4328-1401-003
UNISYS 43281401-006 TURBO JPEG COMPRESSOR PCB 4328 1419-002 43281401006
UNISYS 43281401-006 TURBO JPEG COMPRESSOR PCB 4328 1419-002 43281401006
UNISYS 43328509-002 MICROPROCCESOR PC BOARD 43328509002
UNISYS 43328509-002 MICROPROCCESOR PC BOARD 43328509002
UNISYS 43339191-001 PC BOARD 43339191001
UNISYS 43339191-001 PC BOARD 43339191001
UNISYS 43339191-001 PC BOARD 43339191001
UNISYS 43339191-001 PC BOARD 43339191001
UNISYS 43340603-006 COMMON CONTROLLER REV.J PCB-4334 0595-000 43340603006
UNISYS 43340603-006 COMMON CONTROLLER REV.J PCB-4334 0595-000 43340603006
UNISYS 43355346-001 LAMP CONTROL PCB 4328 1500-001 43355346001
UNISYS 43355346-001 LAMP CONTROL PCB 4328 1500-001 43355346001
UNISYS 43355346-001 LAMP CONTROL PCB 4328 1500-001 43355346001
UNISYS 43355346-001 LAMP CONTROL PCB 4328 1500-001 43355346001
UNISYS 51782405 DRIVER CARD 43347699-006 , 4334-7681-001
UNISYS 51782405 DRIVER CARD 43347699-006 , 4334-7681-001
UNISYS TP213587-00 PC BOARD UDS9718
UNISYS TP213587-00 PC BOARD UDS9718
UNITED MARINE UM-TBPA-7001 JT 15195 INTERFACE PCB UMTBPA7001 JT15195
UNITED MARINE UM-TBPA-7001 JT 15195 INTERFACE PCB UMTBPA7001 JT15195
UNITED SCIENCES 1002-0400-06 DISPLAY BOARD 1002040006
UNITED SCIENCES 1002-0400-06 DISPLAY BOARD 1002040006
UNITED SCIENCES 1003-0500-06 POWER SUPPLY BOARD 1003050006
UNITED SCIENCES 1003-0500-06 POWER SUPPLY BOARD 1003050006
UNITED SCIENCES 1003-1100-01 PRE AMPLIFIER BOARD 1003110001
UNITED SCIENCES 1003-1100-01 PRE AMPLIFIER BOARD 1003110001
UNITED SCIENCES 1003-1700-01 POWER SUPPLY BOARD 1003170001
UNITED SCIENCES 1003-1700-01 POWER SUPPLY BOARD 1003170001
UNITED SCIENCES 601-4000-02 CONTROL BOARD 601400002
UNITED SCIENCES 601-4000-02 CONTROL BOARD 601400002
UNITED SCIENCES 601-4000-02 CONTROL BOARD 601400002
UNITED SCIENCES 601-4000-02 CONTROL BOARD 601400002
UNITED SCIENCES 601-4000-02 CONTROL BOARD 601400002
UNITED SCIENCES 601-4000-02 CONTROL BOARD 601400002
UNITED SCIENCES 601-4000-02 CONTROL BOARD 601400002
UNITED SCIENCES 601-4000-02 CONTROL BOARD 601400002
UNITROL 9280-2 CONTROL BOARD 92802
UNITROL 9280-2 CONTROL BOARD 92802
UNITRONICS M91-P2 PRINTED CIRCUIT BOARD
UNITRONICS M91-P2 PRINTED CIRCUIT BOARD
UNITRONICS M91-R1 PCB CARD
UNITRONICS M91-R1 PCB CARD
UNITRONICS M91-R1 PCB CARD
UNITRONICS M91-R1 PCB CARD
UNITRONICS M91-R1 PCB CARD
UNITRONICS M91-R1 PCB CARD
UNITRONICS M91-R1 PCB CARD
UNITRONICS M91-R1 PCB CARD
UNIVERSAL ANALYZERS 3600-0007 ALARM RELAY CIRCUIT BOARD 36000007
UNIVERSAL ANALYZERS 3600-0007 ALARM RELAY CIRCUIT BOARD 36000007
UNIVERSAL ANALYZERS INC. 3500-0010 POWER SUPPLY BOARD 35000010
UNIVERSAL ANALYZERS INC. 3500-0010 POWER SUPPLY BOARD 35000010
UNIVERSAL ANALYZERS INC. 3500-0010 POWER SUPPLY BOARD 35000010
UNIVERSAL ANALYZERS INC. 3500-0010 POWER SUPPLY BOARD 35000010
UNIVERSAL ANALYZERS INC. 3500-0010 POWER SUPPLY BOARD 35000010
UNIVERSAL ANALYZERS INC. 3500-0010 POWER SUPPLY BOARD 35000010
US BOTTLERS D10426 CIRCUIT BOARD
US BOTTLERS D10426 CIRCUIT BOARD
US ROBOTICS GSEP-M01 PCB BOARD 1.012.0375-D GSEPM01 10120375D
US ROBOTICS GSEP-M01 PCB BOARD 1.012.0375-D GSEPM01 10120375D
USON CORP. SSHD-PROM HARD DRIVE BOARD W/ 40L05X1D FLASH PC CARD
USON CORP. SSHD-PROM HARD DRIVE BOARD W/ 40L05X1D FLASH PC CARD
USON CORP. SSHD-PROM HARD DRIVE BOARD W/ 40L05X1D FLASH PC CARD
USON CORP. SSHD-PROM HARD DRIVE BOARD W/ 40L05X1D FLASH PC CARD
USP PC-41 CIRCUIT BOARD PC41 PR NO.4 REV F
USP PC-41 CIRCUIT BOARD PC41 PR NO.4 REV F
USP PC-41 CIRCUIT BOARD PC41 PR NO.4 REV F
USP PC-41 CIRCUIT BOARD PC41 PR NO.4 REV F
UTSUKI PB-213C ST.2CHAMP PCB CARD MDK311V-0
UTSUKI PB-213C ST.2CHAMP PCB CARD MDK311V-0
UTSUKI ST.AMP PB-212 PCB CARD PB-212B
UTSUKI ST.AMP PB-212 PCB CARD PB-212B
UTSUKI ST.PSU-A PB-215 PCB CARD
UTSUKI ST.PSU-A PB-215 PCB CARD
UTSUKI ST.PSU-A PB-215 PCB CARD
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