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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ON SEMICONDUCTOR MT9V024IA7XTCH-GEVB / MT9V024IA7XTCHGEVB

ON SEMICONDUCTOR NB3L202KMNGEVB / NB3L202KMNGEVB

ON SEMICONDUCTOR MT9V034C12STMH-GEVB / MT9V034C12STMHGEVB

ON SEMICONDUCTOR AR1820HSSC00SHQAH3-GEVB / AR1820HSSC00SHQAH3GEVB

ON SEMICONDUCTOR AR0522SRSM09SURAH3-GEVB / AR0522SRSM09SURAH3GEVB

ON SEMICONDUCTOR AR0231AT7E00XUEAH3-GEVB / AR0231AT7E00XUEAH3GEVB

ON SEMICONDUCTOR MT9M114EBLSTCZDH-GEVB / MT9M114EBLSTCZDHGEVB

ON SEMICONDUCTOR AR1630CSSC34SMFAH3-GEVB / AR1630CSSC34SMFAH3GEVB

ON SEMICONDUCTOR AP0202AT2L00XPGAH3-GEVB / AP0202AT2L00XPGAH3GEVB

ON SEMICONDUCTOR AR0143ATSC00XUEAH3-GEVB / AR0143ATSC00XUEAH3GEVB

ON SEMICONDUCTOR AR1337CSSC32SMFAH3-GEVB / AR1337CSSC32SMFAH3GEVB

ON SEMICONDUCTOR AR0144CSSM00SUKAH3-GEVB / AR0144CSSM00SUKAH3GEVB

ON SEMICONDUCTOR MT9P031I12STCH-GEVB / MT9P031I12STCHGEVB

ON SEMICONDUCTOR AR0144CSSC20SUKAH3-GEVB / AR0144CSSC20SUKAH3GEVB

ON SEMICONDUCTOR AR0135CS2C00SUEAH3-GEVB / AR0135CS2C00SUEAH3GEVB

ON SEMICONDUCTOR MT9F002I12-N4000H-GEVB / MT9F002I12N4000HGEVB

ON SEMICONDUCTOR AR0521SR2C09SURAH3-GEVB / AR0521SR2C09SURAH3GEVB

ON SEMICONDUCTOR AR0134CSSM00SUEAH3-GEVB / AR0134CSSM00SUEAH3GEVB

ON SEMICONDUCTOR AR0144ATSM20XUEAH3-GEVB / AR0144ATSM20XUEAH3GEVB

ON SEMICONDUCTOR NB4N11MDTEVB / NB4N11MDTEVB

ON SEMICONDUCTOR MT9T112PACSTCH-GEVB / MT9T112PACSTCHGEVB

ON SEMICONDUCTOR AP1302CSSL00SMGAH3-GEVB / AP1302CSSL00SMGAH3GEVB

ON SEMICONDUCTOR AR0237IRSH12SHRAH3-GEVB / AR0237IRSH12SHRAH3GEVB

ON SEMICONDUCTOR AR0135CS2M25SUEAH3-GEVB / AR0135CS2M25SUEAH3GEVB

ON SEMICONDUCTOR AP0102AT2L00XPGAH3-GEVB / AP0102AT2L00XPGAH3GEVB

ON SEMICONDUCTOR ASX340AT3C00XPEDH3-GEVB / ASX340AT3C00XPEDH3GEVB

ON SEMICONDUCTOR AR0141IRSH00SUEAH3-GEVB / AR0141IRSH00SUEAH3GEVB

ON SEMICONDUCTOR AR1820HSSC31SMEAH3-GEVB / AR1820HSSC31SMEAH3GEVB

ON SEMICONDUCTOR AS0140AT2C00XUSMH3-GEVB / AS0140AT2C00XUSMH3GEVB

ON SEMICONDUCTOR AR0430CSSC34SMFAH3-GEVB / AR0430CSSC34SMFAH3GEVB

ON SEMICONDUCTOR AR0239SRSC00SUEAH3-GEVB / AR0239SRSC00SUEAH3GEVB

ON SEMICONDUCTOR AR1335CSSC32SMFAH3-GEVB / AR1335CSSC32SMFAH3GEVB

ON SEMICONDUCTOR AR0144CSSM20SUKAH3-GEVB / AR0144CSSM20SUKAH3GEVB

ON SEMICONDUCTOR AR0835HS3C12SUAAH3-GEVB / AR0835HS3C12SUAAH3GEVB

ON SEMICONDUCTOR AR0140CS2C00SUEAH3-GEVB / AR0140CS2C00SUEAH3GEVB

ON SEMICONDUCTOR MARS1-AR0136AT3-GEVB / MARS1AR0136AT3GEVB

ON SEMICONDUCTOR AS0142ATSC00XUSMH3-GEVB / AS0142ATSC00XUSMH3GEVB

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ON SEMICONDUCTOR AR0430CS2C34SMFAH3-GEVB / AR0430CS2C34SMFAH3GEVB

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ON SEMICONDUCTOR NCP1622GEVB / NCP1622GEVB

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PM150RSE120 - Module / Electronic Component / Semiconductor

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ON SEMICONDUCTOR AR0134CSSC00SUEAH-GEVB / AR0134CSSC00SUEAHGEVB

ON SEMICONDUCTOR MT9M131C12STCH-GEVB / MT9M131C12STCHGEVB

ON SEMICONDUCTOR MT9T113PACSTCH-GEVB / MT9T113PACSTCHGEVB

ON SEMICONDUCTOR MARS1-AR0231AT7-GEVB / MARS1AR0231AT7GEVB

ON SEMICONDUCTOR AR0835HS3C12SUAAH-GEVB / AR0835HS3C12SUAAHGEVB

ON SEMICONDUCTOR ASX340CS2C00SPEAH-GEVB / ASX340CS2C00SPEAHGEVB

National 980305817-001 REV.G Semiconductor Circuit Board, 551305817-002 rev.B

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AMAT 3800-00206 RGLTR PRESS SQ2 MICRO Semiconductor store spares

TW392 395-235-00 Rev A Printed Circuit Board PCB Semiconductor Spare

1 2 PCS NAtional Semiconductor 54F174LMQB/QS

1 PC  3RF2440-1AC45 Semiconductor Contactor By DHL/EMS #F2