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。
413-0101 NSK M-JSG014DN503 MOTOR
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104-0101// AMAT APPLIED 0010-22930 FACILITY PLATE, POSITION 2, WI
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O2
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349-0201// AMAT APPLIED 0010-06464 VALVE PNEU 1.50 OD PORT KALREZ
349-0201// AMAT APPLIED 0010-70441 PVD HP LIFT
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105-0101 AMAT APPLIED 0010-19913 0040-76895 APPLIED MATRIALS COMPONENTS
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165-0201 AMAT APPLIED 0010-70052 wASSY 20SLOT VME CONTROL
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136-0601// AMAT APPLIED 0010-76952 ASSY, IHC CHAMBER A, B, AND C,
330-0201// AMAT APPLIED 0010-08217 APPLIED MATRIALS COMPONENTS
322-0401// AMAT APPLIED 0242-09036 0010-30064 0010-10973 KIT, H.O.T. PACK,
136-0601// AMAT APPLIED 0010-00744 20SCCM
104-0401// AMAT APPLIED 0090-00908 ASSY, SYSTEM INTERLOCK 200MM ENDURA SL
005-0102 DAIHEN FGA-30A2 ES2L39-000006-21 RF GENERATOR ASIS
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