1203-FM1

1203-FM1

1203-FM1

1203-FM1

   1．向高速度、大容量方向發展

 為了提高PLC的處理能力，要求PLC具有更好的響應速度和更大的存儲容量。目前，有的PLC的掃描速度可達0.1ms/k步左右。PLC的掃描速度已成為很重要的一個性能指標。

 在存儲容量方面，有的PLC最高可達幾十兆字節。為了擴大存儲容量，有的公司已使用了磁泡存儲器或硬盤。

    2．向超大型、超小型兩個方向發展

 當前中小型PLC比較多，為了適應市場的多種需要，今后PLC要向多品種方向發展，特別是向超大型和超小型兩個方向發展。現已有I/O點數達14336點的超大型PLC，其使用32位微處理器，多CPU并行工作和大容量存儲器，功能強。

 小型PLC由整體結構向小型模塊化結構發展，使配置更加靈活，為了市場需要已開發了各種簡易、經濟的超小型微型PLC，最小配置的I/O點數為8～16點，以適應單機及小型自動控制的需要，如三菱公司α系列PLC。

    3．PLC大力開發智能模塊，加強聯網通信能力

 為滿足各種自動化控制系統的要求，近年來不斷開發出許多功能模塊，如高速計數模塊、溫度控制模塊、遠程I/O模塊、通信和人機接口模塊等。這些帶CPU和存儲器的智能I/O模塊，既擴展了PLC功能，又使用靈活方便，擴大了PLC應用范圍。

加強PLC聯網通信的能力，是PLC技術進步的潮流。PLC的聯網通信有兩類：一類是PLC之間聯網通信，各PLC生產廠家都有自己的專有聯網手段；另一類是PLC與計算機之間的聯網通信，一般PLC都有專用通信模塊與計算機通信。為了加強聯網通信能力，PLC生產廠家之間也在協商制訂通用的通信標準，以構成更大的網絡系統，PLC已成為集散控制系統（DCS）不可缺少的重要組成部分。

     4．增強外部故障的檢測與處理能力

     根據統計資料表明：在PLC控制系統的故障中，CPU占5%，I/O接口占15%，輸入設備占45%，輸出設備占30%，線路占5%。前二項共20%故障屬于PLC的內部故障，它可通過PLC本身的軟、硬件實現檢測、處理；而其余80%的故障屬于PLC的外部故障。因此，PLC生產廠家都致力于研制、發展用于檢測外部故障的專用智能模塊，進一步提高系統的可靠性。

    5．編程語言多樣化

  在PLC系統結構不斷發展的同時，PLC的編程語言也越來越豐富，功能也不斷提高。除了大多數PLC使用的梯形圖語言外，為了適應各種控制要求，出現了面向順序控制的步進編程語言、面向過程控制的流程圖語言、與計算機兼容的高級語言（BASIC、C語言等）等。多種編程語言的并存、互補與發展是PLC進步的一種趨勢。

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Emerson LE220EM3 Plastic Cover for Main Board

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Emerson LF320EM4 A BA4AFFG0201 1 LED Main Power Supply Board Unit

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Emerson LF320EM4 LF320EM4F Digital Main Board A3AFCMMA A3AF012 BA31MOG0201

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Emerson LF320EM4 Main Board BA3AFCG0201 2 A3AFC-MMA

Emerson LF320EM4 Main Board BA3AFUG0201 1 , U9001UT , A3AFU011

Emerson LF320EM4 Main Board To LED Screen Cable

Emerson LF320EM4 ME5 BA3AFUG0201 1 V.2 Digital Main Video Board Motherboard

Emerson LF320EM4 Power Supply Board A3AF0021

Emerson LF320EM4 Power Supply Board BA3AF0F0102 3, A3AFU023

Emerson LF320EM4A Cable Wire (Power/Main Board to LED Backlight Strip)

Emerson LF320EM4A Digital Main Board / Power Supply Unit A4AF0MMA-002 A4AF0UH

Emerson LF320EM4A Key Button, IR Sensor Board BA31T0G0203 1

Emerson LF320EM4A Main / Power Supply Board A4AFEMMA-001

Emerson LF320EM4A Main Board / Power Supply A4AF0MMA-002

Emerson LF320EM4A Main Board A4AFPMMA-001

Emerson LF320EM4A Main Board BA4AF0G0201 1 , A4AF0MMA , A4AF0UH

Emerson LF320EM4A Main Board to IR Sensor, Button Board LVDS Ribbon Cable

Emerson LF320EM4A Main Board To Screen Panel Cable

Emerson LF320EM4A Main Board To Screen Panel LVDS Ribbon Cable

EMERSON LF320EM4A POWER /MAIN BOARD A4AF0-MMA A4AF0UH BA4AF0G0201 2

Emerson LF320EM4A Power Supply Board, Main Board BA4AFCG0201 2

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Emerson LF320EM4F Key Button Board , IR Sensor BA31M0G0203 1

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Emerson LF320EM4F T-Con Board 6871L-3203C, 6870C-0442B

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