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。
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ACCURAY 670216021 PC BOARD GPU 83883-002
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ACCURAY 7-083882-001 PC BOARD 7083882001
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ACCURAY 8-073831-002 CONTROL BOARD 8073831002
ACCURAY 8-073831-002 CONTROL BOARD 8073831002
ACCURAY 8-073831-002 CONTROL BOARD 8073831002
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ACCURAY 8-074518-001 PC BOARD 8074518001
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ACCURAY INCORPORATED 025445 CIRCUIT BOARD REV.B 025448A
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ACOZ 6739805XD-2C PCB CARD 6739805XD-1C
ACOZ 6739805XD-2C PCB CARD 6739805XD-1C
ACOZ 6739805XD-2C PCB CARD 6739805XD-1C
ACOZ 6739805XD-2C PCB CARD 6739805XD-1C
ACOZ 6739805XD-2C PCB CARD 6739805XD-1C
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ACRISON 105-2-178 POWER BOARD 1052178
ACRISON 105-2-260 PC BOARD 1052260
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ACRISON M-4-977 PC BOARD M4977
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ACRISON MD-2-424 PC BOARD 115-0847 MD2424
ACRISON MD-2-424 PC BOARD 115-0847 MD2424
ACRISON MD-2-424 PC BOARD 115-0847 MD2424
ACRISON MD-2-424 PC BOARD 115-0847 MD2424
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ACROMAG 1018-117D CIRCUIT BOARD 1018117D
ACROMAG 1018-117D CIRCUIT BOARD 1018117D
ACROMAG 1018-150C PC BOARD 1018150C
ACROMAG 1018-150C PC BOARD 1018150C
ACROMAG 1018-163G POWER RELAY BOARD 1018163G
ACROMAG 1018-163G POWER RELAY BOARD 1018163G
ACROMAG 1018-177F CIRCUIT BOARD 1018177F
ACROMAG 1018-177F CIRCUIT BOARD 1018177F
ACROMAG 1018-331B CIRCUIT BOARD 527-1 1013-116A 1018331B
ACROMAG 1018-331B CIRCUIT BOARD 527-1 1013-116A 1018331B
ACROMAG 206-246 PC BOARD 1018-091D 206246
ACROMAG 206-246 PC BOARD 1018-091D 206246
ACROMAG 712-RB PC BOARD 712RB
ACROMAG 712-RB PC BOARD 712RB
ACROMAG 712-SQ PC BOARD 712SQ 076-4
ACROMAG 712-SQ PC BOARD 712SQ 076-4
ACROMAG 751-INT PC BOARD 751INT 076-2
ACROMAG 751-INT PC BOARD 751INT 076-2
ACROMAG 900EN-S005 FIVE PORT ETHERNET SWITCH 10/100 MBPS
ACROMAG 900EN-S005 FIVE PORT ETHERNET SWITCH 10/100 MBPS
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ACROMAG 900EN-S005 FIVE PORT ETHERNET SWITCH 10/100 MBPS
ACROMAG 981PB-2012 PROFIBUS DP MODULE
ACROMAG 981PB-2012 PROFIBUS DP MODULE
ACROMAG A. 206245 ISOLATOR BOARD A206245
ACROMAG A. 206245 ISOLATOR BOARD A206245
ACROMAG A.206248 ACROMAG-1018-093 CIRCUIT BOARD A206248
ACROMAG A.206248 ACROMAG-1018-093 CIRCUIT BOARD A206248
ACROMAG A.206248 CIRCUIT BOARD 1018-093 A206248
ACROMAG A.206248 CIRCUIT BOARD 1018-093 A206248
ADAPTEC 39160 SCSI CARD
ADAPTEC 39160 SCSI CARD
ADAPTEC 39160 SCSI CARD
ADAPTEC AHA-294OU2W PC BOARD ASSY# 1686906-13 AHA294OU2W
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ADAPTEC PB645479-004 NETWORK CARD MP647569-004 PB645479004
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ADAPTIVE MICRO SYSTEMS 11719001R DISPLAY BOARD 32x16 45117101
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ADAPTIVE MICRO SYSTEMS 11719001R DISPLAY BOARD 32x16 45117101
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ADAPTIVE MICRO SYSTEMS 11719001R DISPLAY BOARD 32x16 45117101
ADAS ELECTRONIQUE ICM-212/A PC BOARD ICM212A
ADAS ELECTRONIQUE ICM-212/A PC BOARD ICM212A
ADEPT TECH 10840-42160 OUTER LINK CARD 1084042160
ADEPT TECH 10840-42160 OUTER LINK CARD 1084042160
ADI SYSTEMS 060-020-002B EDGE DETECTOR BOARD REV.A 060020002B
ADI SYSTEMS 060-020-002B EDGE DETECTOR BOARD REV.A 060020002B
ADTRON I35CF-M64SXC01 IDE STORAGE DRIVE PCB 720100065 REV A
ADTRON I35CF-M64SXC01 IDE STORAGE DRIVE PCB 720100065 REV A
ADVANCED ENERGY 2301236-B PINNACLE LOGIC II PCB BOARD 2301236B
ADVANCED ENERGY 2301236-B PINNACLE LOGIC II PCB BOARD 2301236B
ADVANCED ENERGY 2301236-B PINNACLE LOGIC II PCB BOARD 2301236B
ADVANCED ENERGY 2301236-B PINNACLE LOGIC II PCB BOARD 2301236B
ADVANCED ENERGY 2301236-B PINNACLE LOGIC II PCB BOARD 2301236B
ADVANCED ENERGY 2301236-B PINNACLE LOGIC II PCB BOARD 2301236B
ADVANCED ENERGY 2302050-A PINNACLE PASSIVE DISPLAY BOARD 2302050A
ADVANCED ENERGY 2302050-A PINNACLE PASSIVE DISPLAY BOARD 2302050A
ADVANCED TECHNOLOGY 22900035 CIRCUIT BOARD 25500035 700539
ADVANCED TECHNOLOGY 22900035 CIRCUIT BOARD 25500035 700539
ADVANTAGE CONTROLS 3-533-0351G PC BOARD APCI MODULE
ADVANTAGE CONTROLS 3-533-0351G PC BOARD APCI MODULE
ADVANTAGE CONTROLS 3-533-0351G PC BOARD APCI MODULE
ADVANTAGE CONTROLS 3-533-0351G PC BOARD APCI MODULE
ADVANTAGE ELECTRONICS 3-531-2781A PC BOARD 35312781A
ADVANTAGE ELECTRONICS 3-531-2781A PC BOARD 35312781A
ADVANTAGE ELECTRONICS 3-531-4350A PC BOARD HDCI
ADVANTAGE ELECTRONICS 3-531-4350A PC BOARD HDCI
ADVANTAGE ELECTRONICS 3-531-4582A PC BOARD 35314582A
ADVANTAGE ELECTRONICS 3-531-4582A PC BOARD 35314582A
ADVANTECH PCM-916 RISER CARD 19AK091600-01 REV A1
ADVANTECH PCM-916 RISER CARD 19AK091600-01 REV A1
ADVANTECH POS-563 PC BOARD 1907056302 , POS563
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