IC693PIF301 PLC的基本結(jié)構(gòu)和工作原理

作為一種工業(yè)控制的計(jì)算機(jī)，PLC和普通計(jì)算機(jī)有著相似的結(jié)構(gòu)；但是由于使用場(chǎng)合、目的不同，在結(jié)構(gòu)上又有一些差別。

1.PLC的硬件組成

PLC硬件系統(tǒng)的基本結(jié)構(gòu)如下

PLC的主機(jī)由CPU、存儲(chǔ)器（EPROM、RAM）、輸入/輸出單元、外設(shè)I/O接口、通信接口及電源組成。對(duì)于整體式PLC，這些部件都在同一個(gè)機(jī)殼內(nèi)。而對(duì)于模塊式PLC，各部件獨(dú)立封裝，稱為模塊，各模塊通過(guò)機(jī)架和電纜連接在一起。主機(jī)內(nèi)的各個(gè)部分均通過(guò)電源總線、控制總線、地址總線和數(shù)據(jù)總線連接，根據(jù)實(shí)際控制對(duì)象的需要配備外部設(shè)備，構(gòu)成不同的PLC控制系統(tǒng)。常用的外部設(shè)備有編程器、打印機(jī)、EPROM寫(xiě)入器等。PLC可以配置通信模塊與上位機(jī)及其他的PLC進(jìn)行通信，構(gòu)成PLC的分布式控制系統(tǒng)。

IC693PIF301 

Reliance Electric AutoMax # 57C414

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Reliance Electric Common Memory Module # 57C423

Reliance Electric HR2000 BLA-08 AC Servo drive 3RA2002

Reliance Electric Remote I/O Interface Module # 45C554

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Reliance Electric 2GU21001 AC VFD Speed Drive GP-2000

Reliance Electric HR2000 / BLA-16 Brushless AC Servo 

Reliance Electric D-6590-043 Pin D6590043 NEW

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New Reliance Electric AC VS Drive 1AC2101U 230V #28845

RELIANCE ELECTRIC PLASTIC REF POT ASSY 608870 - 91R

0-57003 Reliance Electric Voltage Tach Follower Kit

Reliance Electric IRCC Card Board 0-51839-2 51839-2

NIB Reliance Electric Rectifier 701819-201AW

Reliance Electric 57456-B 115V AC input module 61C500

RELIANCE ELECTRIC 0-51865-15 CLDR 05186515 GUARANTEED

NIB RELIANCE ELECTRIC 45C40 115V INPUT MODULE CONTROL*

Reliance Electric Max Pak V/S. Spindle Drive (4205)

RELIANCE ELECTRIC 14C201 Operator Control Station NEW

Reliance Electric Max Pak V/S. Spindle Drive (4204)

Reliance Electric Company 700304-3S Brush Holder

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Reliance Electric Auxiliary Contact 78095-1C 780951C

Reliance Electric 0-57636-C/61C501 115V AC/DC Input

RELIANCE ELECTRIC 2GU41002 AC DRIVE

Reliance Electric 3 HP AC VS Drive GP-1200 1AC4103U

NEW RELIANCE ELECTRIC 410403-43AC THYRISTOR 41040343AC

Reliance Electric PC Current Voltage 0-51831-2 51831-2

Reliance Electric AC DRIVE 1HP 230V SP500 Inverter NEW

RELIANCE ELECTRIC 837'02-20A DYNAMIC BREAKING UNIT Used

Reliance Electric DPSF Card Board 0-51890-5 51890-5 

RELIANCE ELECTRIC RECTIFIER STACK 86466-87R

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RELIANCE ELECTRIC RESISTOR 63481-6J

RELIANCE ELECTRIC SP600 AC DRIVES 6SP501-2P7CTNN SER A

RELIANCE ELECTRIC RESISTOR 63481-6U

IC693PIF301