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。
GE MAIN REFRIGERATOR PCB CONTROL BOARD 197D8523G101
LG MAIN REFRIGERATOR CONTROL BOARD PCB EBR81182751
EBR83845003 LG REFRIGERATOR CONTROL BOARD
LG MAIN REFRIGERATOR PCB CONTROL BOARD EBR78940512 COMPATIBLE EBR84457305
MASTER REPAIR SERVICE 2307028R 2307028 2252111 2223443 2307005 Control Board
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200D4864G014 GE REFRIGERATOR CONTROL BOARD
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225D4208G003 GE MAIN REFRIGERATOR BOARD PCB
LG MAIN REFRIGERATOR PCB CONTROL BOARD EBR41956402
LG MAIN REFRIGERATOR CONTROL BOARD PCB EBR41956401
LG MAIN REFRIGERATOR PCB CONTROL BOARD EBR73093608 COMAPTIBLE EBR73093617
LG KENMORE MAIN REFRIGERATOR CONTROL BOARD EBR75234701 COMPATIBLE EBR75234710
LG EBR41956425 REFRIGERATOR MAIN CONTROL BOARD PCB
GE REFRIGERATOR MAIN CONTROL BOARD PCB 197D8513G101
LG MAIN REFRIGERATOR PCB CONTROL BOARD EBR78940509
LG MAIN REFRIGERATOR PCB CONTROL BOARD EBR73093617 COMPATIBLE EBR73093608
LG MAIN REFRIGERATOR PCB CONTROL BOARD EBR73093617 COMPATIBLE EBR73093608
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LG REFRIGERATOR PCB MAIN CONTROL BOARD EBR83806902
LG REFRIGERATOR PCB MAIN CONTROL BOARD EBR83806902
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LG MAIN REFRIGERATOR CONTROL BOARD PCB EBR74796433
200D4850G013 GE REFRIGERATOR CONTROL BOARD
GE MAIN REFRIGERATOR PCB CONTROL BOARD 200D6221G016
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200D4854G013 GE REFRIGERATOR CONTROL BOARD
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200D5076G005 GE REFRIGERATOR CONTROL BOARD MAIN
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LG MAIN REFIRGERATOR CONTROL BOARD PCB EBR77042523
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WHIRLPOOL MAIN REFRIGERATOR CONTROL BOARD PCB W10738538
W10446514 WHIRLPOOL REFRIGERATOR CONTROL BOARD
W10446514 WHIRLPOOL REFRIGERATOR CONTROL BOARD
LG MAIN REFRIGERATOR CONTROL BOARD PCB OEM EBR64110509
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LG MAIN REFRIGERATOR CONTROL BOARD PCB EBR74796404
LG REFRIGERATOR MAIN CONTROL BOARD PCB EBR73304203
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LG REFRIGERATOR MAIN PCB CONTROL BOARD EBR74796444
LG REFRIGERATOR MAIN PCB CONTROL BOARD EBR74796444
LG KENMORE MAIN REFRIGERATOR PCB CONTROL BOARD EBR64110556
LG MAIN REFRIGERATOR PCB CONTROL BOARD EBR67348013
6871JB1375E LG REFRIGERATOR CONTROL BOARD
LG KENMORE MAIN REFRIGERATOR CONTROL BOARD EBR64110501
WHILRPOOL REFRIGERATOR CONTROL BOARD PART W10235414
12920710 WHIRLPOOL REFRIGERATOR CONTROL BOARD
12920710 WHIRLPOOL REFRIGERATOR CONTROL BOARD
LG REFRIGERATOR PCB CONTROL BOARD EBR65002709 COMPATIBLE EBR65002715
GE REFRIGERATOR MAIN CONTROL BOARD PCB 200D2259G009
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EBR73093611 LG MAIN REFRIGERATOR PCB CONTROL BOARD
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W10310240A WHIRLPOOL REFRIGERATOR CONTROL BOARD
GE MAIN REFRIDGERATOR PCB CONTROL BOARD 197D8514G001
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LG MAIN REFRIGERATOR PCB CONTROL BOARD EBR78643415
LG EBR83845032 Main PCB Assembly
LG MAIN REFRIGERATOR PCB CONTROL BOARD EBR74796471
SAMSG DA41-00614F REFRIGERATOR INVERTER BOARD MASTER REPAIR / REBUILD SERVICE
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LG KENMORE REFRIGERATOR PCB CONTROL BOARD EBR77042533 COMPATIBLE CSP30020830
LG KENMORE REFRIGERATOR PCB MAIN CONTROL BOARD EBR75234712
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DA41-00651K SAMSG REFRIGERATOR MAIN CONTROL BOARD
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LG REFRIGERATOR PCB MAIN CONTROL BOARD EBR41531306
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LG MAIN REFRIGERATOR PCB CONTROL BOARD EBR74796432 COMPATIBLE EBR74796405
GE REFRIGERATOR MAIN PCB CONTROL BOARD 200D2260G006
GE REFRIGERATOR MAIN PCB CONTROL BOARD 200D2260G006
LG REFRIGERATOR MAIN PCB CONTROL BOARD EBR36222901
LG MAIN REFRIGERATOR PCB CONTROL BOARD EBR41956418
LG REFRIGERATOR MAIN PCB CONTROL BOARD EBR73304224
LG MAIN REFRIGERATOR PCB CONTROL BOARD EBR74796439 Replaces 3381679
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SAMSG REFRIGERATOR PCB MAIN CONTROL BOARD DA92-00246A
LG REFRIGERATOR MAIN PCB CONTROL BOARD EBR78940601
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LG REFRIGERATOR CONTROL BOARD EBR41956440
GE REFRIGERATOR MAIN CONTROL BOARD PCB 200D4854G012
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GE MAIN REFRIGERATOR PCB CONTROL BOARD 200d4864g036
LG REFRIGERATOR CONTROL BOARD MAIN PCB EBR74796448
W10811365 WHIRLPOOL REFRIGERATOR CONTROL BOARD
LG MAIN REFRIGERATOR PCB CONTROL BOARD EBR78940623
EBR74796403 LG REFRIGERATOR CONTROL BOARD
LG MAIN REFRIGERATOR CONTORL BOARD PCB EBR81182783
200D6223G004 GE MAIN REFRIGERATOR BOARD PCB
LG REFRIGERATOR PCB ASSEMBLY MAIN CONTROL BOARD EBR74796401
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LG MAIN REFRIGERATOR PCB CONTROL BOARD EBR74796405 COMPATIBLE EBR74796432
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LG Kenmore Refrigerator Control BOARD PCB EBR74796470
SAMSG REFRIGERATOR PCB CONTROL BOARD DA41-00651R
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200D6221G036 GE MAIN REFRIGERATOR BOARD PCB
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LG MAIN REFRIGERATOR PCB CONTROL BOARD EBR78940618
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6871JB1431A LG REFRIGERATOR CONTROL BOARD
6871JB1431A LG REFRIGERATOR CONTROL BOARD
GE MAIN REFRIGERATOR PCB CONTROL BOARD 200D4854G018
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LG MAIN REFRIGERATOR PCB CONTROL BOARD EBR73093602
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EBR73093610 LG REFRIGERATOR CONTROL BOARD
LG MAIN REFRIGERATOR PCB CONTROL BOARD EBR65002705
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EBR65002701 LG REFRIGERATOR CONTROL BOARD
EBR65002701 LG REFRIGERATOR CONTROL BOARD
LG REFRIGERATOR MAIN PCB CONTROL BOARD ASSEMBLY EBR78940614
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LG KENMORE REFRIGERATOR PCB MAIN CONTROL BOARD 6871JB1284C
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