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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INGERSOLL RAND 32012957 FILTER ELEMENT -
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MIELE 2596850 SELECTOR SWITCH W12.054 FOR WASHING MACHINE -
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KMCC-85/EXP3 LIFT/ELEVATOR BOARD 397450 H06
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KINS SPECIAL GAUGE SS-3071 PRESSURE GAUGE
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CONSILIUM SALWICO SW-1/Ex HEAT DETECTOR
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ROBERTSHAW EA3 58-487108 THERMOSTAT RANGE 100-250°C
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HANNING ELEKTRO-WERKE DPS25R--391 HAFLOWTIC COMPACT DRAIN PUMP
CAREL DPWC111000 TEMPERATURE AND HUMIDITY SENSOR
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KDE KID-5000 PCB REV.A PCB
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HIRSCHMANN MM2-4TX1 MICE MEDIA MODULE
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MSA QUICK DRAW PUMP PART FOR GAS DETECTION
ZIMMER HAMBURG NR-SYSTEM GPP-LEVEL PROBE WITH PLASTIC HOUSING
ATLAS COPCO 0574800245 HOSE ASSEMBLY
SYMBOL 21-65587-02 REV D BATTERY 7.4V,2200 mAh -
100117302 DRAFT GAUGE 4-20 MA
ELECTROLUX 0KC450 PEELING MACHINE CPL. HANDLE
OKI AYU901-2482G00 HOOK PCB SWITCH
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NOV/SHAFFER 168021 PLT, LEVER, LKG, DOOR,18/15M, F/RAM
ALCO SP-931 OIL FILTER 082101 -
SWAGELOK SS316 NVM ELBOW TUBE FITTING, TUBE OD 10 MM X 3/8 in - LOT OF 6
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EDYCY-44 DIESEL ENGINE PRESSURE SENSOR, M18X1.5, 0-1MPa, 17021593
K376932 H03 LIFT/ELEVATOR BOARD
BEPE ELEKTRONIK EL111XA PCB
HOBART 71313 BUSHING KNIFE RETAINING
MUELLER REFRIGERATION A11031 RECEIVER VALVE 1/4FLEX-1/4MPT
FIBER P235JR TIMER SWITCH LOCK TIME SWITCH - 230V-50/60 Hz-12 MIN
MSA AUER DIN-33882 5146-970 GAS DETECTOR TUBE PUMP
NATIONAL OILWELL VARCO NOV 118128-Z ZINC ANODES
AnaSat LNC 30570 C-BAND 35°K
ASCO JOUCOMATIC NF-01.5-N SOLENOID VALVE BODY G1/8 -
MEIYO ELECTRIC PTR M RESISTANCE BULB
BAELZ AUTOMATIC RSM 638 SG ELECTRIC VALVE MOTOR
SAMYG SM-6000R HAND MICROPHONE
DANFOSS 018F4120 SOLENOID COIL BJ240CS -
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GRÄSSLIN TALENTO 371 DIN-RAIL TIMER MODULE
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