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 IC693ACC301   IC693ACC301     

當(dāng)CPU處理前臺(tái)任務(wù)時(shí)，USB的傳輸可在后臺(tái)進(jìn)行；后臺(tái)中斷服務(wù)程序和前臺(tái)主程序循環(huán)之間的數(shù)據(jù)交換可以通過事件標(biāo)志和數(shù)據(jù)緩沖區(qū)來(lái)實(shí)現(xiàn)。當(dāng)PDIUSBD12從USB收到一個(gè)數(shù)據(jù)包，即對(duì)CPU產(chǎn)生一個(gè)中斷請(qǐng)求，CPU立刻響應(yīng)中斷。在中斷服務(wù)程序中，固件將數(shù)據(jù)包從PDIUSBD12內(nèi)部緩沖區(qū)移到循環(huán)數(shù)據(jù)緩沖區(qū)，并將PDIUSBD12的內(nèi)部緩沖區(qū)清零，以便接收新的數(shù)據(jù)包，使CPU可以繼續(xù)執(zhí)行當(dāng)前的前臺(tái)任務(wù)直到完成。本文利用PDIUSBD12的端點(diǎn)1進(jìn)行命令的傳輸和應(yīng)答，端點(diǎn)1每次接收計(jì)算機(jī)發(fā)送過來(lái)的8 B指令，其指令格式如表2所示。例如，接收到十六進(jìn)制碼52 01 00 03 00 07 00 50，表示讀24C01器件從03字節(jié)開始的7個(gè)字節(jié)的數(shù)據(jù)。52H為R的ASCII碼，57H為W的ASCII碼。端點(diǎn)2用于數(shù)據(jù)的傳輸。

PLC的發(fā)展趨勢(shì)
    隨著PLC應(yīng)用領(lǐng)域日益擴(kuò)大，PLC技術(shù)及其產(chǎn)品結(jié)構(gòu)都在不斷改進(jìn)，功能日益強(qiáng)大，性價(jià)比越來(lái)越高。

    （1）、在產(chǎn)品規(guī)模方面，向兩極發(fā)展。一方面，大力發(fā)展速度更快、性價(jià)比更高的小型和超小型PLC。以適應(yīng)單機(jī)及小型自動(dòng)控制的需要。另一方面，向高速度、大容量、技術(shù)完善的大型PLC方向發(fā)展。隨著復(fù)雜系統(tǒng)控制的要求越來(lái)越高和微處理器與計(jì)算機(jī)技術(shù)的不斷發(fā)展，人們對(duì)PLC的信息處理速度要求也越來(lái)越高，要求用戶存儲(chǔ)器容量也越來(lái)越大。
    （2）、向通信網(wǎng)絡(luò)化發(fā)展
    PLC網(wǎng)絡(luò)控制是當(dāng)前控制系統(tǒng)和PLC技術(shù)發(fā)展的潮流。PLC與PLC之間的聯(lián)網(wǎng)通信、PLC與上位計(jì)算機(jī)的聯(lián)網(wǎng)通信已得到廣泛應(yīng)用。目前，PLC制造商都在發(fā)展自己的通信模塊和通信軟件以加強(qiáng)PLC的聯(lián)網(wǎng)能力。各PLC制造商之間也在協(xié)商通用的通信標(biāo)準(zhǔn)，以構(gòu)成更大的網(wǎng)絡(luò)系統(tǒng)。PLC已成為集散控制系統(tǒng)（DCS）*的組成部分。
   手機(jī)

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鄭娟萍

廈門仲鑫航自動(dòng)化設(shè)備有限公司  

 （3）、向模塊化、智能化發(fā)展
    為滿足工業(yè)自動(dòng)化各種控制系統(tǒng)的需要，近年來(lái)，PLC廠家先后開發(fā)了不少新器件和模塊，如智能I/O模塊、溫度控制模塊和專門用于檢測(cè)PLC外部故障的智能模塊等，這些模塊的開發(fā)和應(yīng)用不僅增強(qiáng)了功能，擴(kuò)展了PLC的應(yīng)用范圍，還提高了系統(tǒng)的可靠性。
    （4）、編程語(yǔ)言和編程工具的多樣化和標(biāo)準(zhǔn)化
    多種編程語(yǔ)言的并存、互補(bǔ)與發(fā)展是PLC軟件進(jìn)步的一種趨勢(shì)。 PLC廠家在使硬件及編程工具換代頻繁、豐富多樣、功能提高的同時(shí)，日益向MAP(制造自動(dòng)化協(xié)議)靠攏，使PLC的基本部件，包括輸入輸出模塊、通信協(xié)議、編程語(yǔ)言和編程工具等方面的技術(shù)規(guī)范化和標(biāo)準(zhǔn)化。

Okidata ML320/321  9-Wire  Printhead, PN: 50063802  

OKIDATA 100 SERIES PRINTHEAD REFURBISHED  

Okidata ML320/321  9-Wire  Printhead, PN: 50063802  

Omron Model: V600-HAM42-DT Head Amplifier   

Omron Model: E3S-X3CB4 Fiber Optic Amplifier  

Omron Model: D4E-1B20N Enclosed Limit Switch Side Mnt. 

Omron Type: EE-SX471 Sensor.    

Omron Type: EE-SPY311 Dark-On Diffused Mode Optical Sensor New Old Stock. No  

Omron F150 Vision Mate Controller.  P/N: F150-C10E.  RS-232C, 24VDC, 0.5A   W

Omron Model: D4DL-1CFG-B Small Door Lock Switch  

Lot of Omron Model: D2D-1000 Electromechanical Switch Door Interlock.  Qty. 5  

OMRON Model:  PU-NA Controller Unit     =

Set of Omron Model: A3GT-K2A11-C  Panel Mounted Key Lock Switch Unit  

Omron Model: N2BJ-BH24D Electronic Switch / Buzzer   

Omron Model: E2E-X1R5E2 Proximity Switch. 12-24 Volts, 200mA Max.  

Omron Type: E53-CK01 Communication Module.   New Old Stock.    

Omron: H5AN-4D Digital / LED Timer w/Mounting Hardware 

(5) OMRON E3S-X3CE4 Photoelectric switch =

Omron Model: S8E3-05031D  Power Supply.  Tested Good  

Omron Type: EE-SPZ401W-02  Light-On Optical Sensor / Switch     O

Omron, Pack of 10 P7PF-08-E Connecting Sockets, New

Omron Model: E3C-GE4 Photoelectric Amplifier w/Base  

OMRON PTF08A CONNECTING SOCKET QTY (10) IN BOX NEW  

(20) PEPPERL + FUCHS 33421 Proximity Sensor, =

Sun Valley Plastics Model: SVP-520T Timer.  Tested Good       J 

Bold Technologies Model: 625DS Dump Rinse Control.  Tested  Good       J 

Omron Model: G7J-4A-B Power Relay w/ Bracket   W

Omron Model: G7J-4A-B Power Relay w/o  Bracket   W

Omron Type: EE-2002 NPN / PNP Converter   

Omron Type: EE-SX470 Sensor.  New Old Stock    

(2) OMRON E3V-DS70C43S Sensor =

Omron Type: EE-SX672A Optical Sensor / Slotted Interrupter  

Omron Type: EE-SPYX301 Light-On Optical Sensor / Switch 

Omron Type: EE-SX671 Optical Sensor / Slotted Interrupter  

Omron Type: H5A Digital Timer.  Tested Good.       J 

Lot ECGPhilips Model: RLY5142 Subminiature Relays.  Qty. 5   W

Lot ECGPhilips Model: RLY5140 Subminiature Relays.  Qty.3   W

Lot ECGPhilips Model: RLY2062 Relays.  Qty.3   W

Omron Type: EE-SPY412 Light-On Optical Sensor / Switch 

Lot of Omron Model: G2R-1-SND, 24V DC Relay.  Qty. 5  

OMRON S82H Power Supply S82H-3524 =

(4) OMRON G730 Remote Terminal G730-ID04C, G730-ID08C =

OMRON EE-SX670 SENSOR.   Lot of 2 .   New Old Stock   

Lot of Omron Model: MY4N Relays with Base.  Qty. 2  

WESTEK THREADER OVERTEMP CSA CL1251 XLPE 20644-2 PEPI  

Omron Model:  E3C-S20W Fiber Optic Sender / Receiver.  New Old Stock

Electromatic Model: RT 202 380 10 24 Solid State Reversing Relay      O

Omron Type: EE-SX671A Optical Sensor / Slotted Interrupter.  New Old Stock.   

Omron Type: E8CC-10C  Pressure Sensor  

Omron Type: H3Y-4 Timer with Base =

Omron:  E6B-CWZ6C-8 Rotary Incremental Encoder .  5 - 24 VDC. 125 P/R Res.   O 

Omron Model: VR600-HS63 RFID Read/Write Sensor Head   W

Omron Type: K3TX-VD11 Digital Panel Meter with Rails.  Tested Good   

Cincinnati Electrosystems Model: 432-DCV-S0-N12 Digital Display Panel.  Rev. G  

Omron Type: EE-SPY41 Photomicrosensor REL Light-On  

Omron:  E6B-CWZ3C-20 Rotary Incremental Encoder .  5 - 12 VDC. 125 P/R Res.   O 

Lot of Omron MY2-24VDC Relays.  Qty. 2.  New Old Stock.  No Box   

Omron Type:  E3Z-D61 LED Diffuse Reflective Sensor  

Omron Type: E3F-3DZ2 Photoelectric Switch, 24-240VAC  

Omron Model:  E3V-R2C43S  Photoelectric Sensor      O 

Omron Model: S82K-05024 Power Supply.  Output: DC24V, 2.1A,  AC: 100-240V, 1.3A 

Omron Model: G3F-203S Relay with Omron 2-M4X10  Base  

Omron: G7TC-OC16-DC 16 Point Relay Block w/16 Relays 

Omron: G7TC-OC16-DC 16 Point Relay Block w/13 Relays 

Lot of Omron: G2R-1-SN Relays with Base  

Omron Model: LY4I4N Relay with Allen Bradley 700-NH139 Series A Base  

Omron Model: E32-TC200 Photoelectric Switch / Fiber Unit.  New Old Stock  

Lot of Omron Model: D2D-1000 Electromechanical Switch Door Interlock.  Qty. 2  

(2) OMRON E32-D22L Photoelectric Switch Fiber Unit NIB=

Omron Model: E3V-DS8C43S Photoelectric Sensor  

Omron Model: E32-CC200 Photoelectric Switch / Fiber Unit.  New Old Stock  

Omron Model: E2K-C25MY1 Capacitive Proximity Switch  

OKIDATA 100 SERIES PRINTHEAD REFURBISHED  

Omron Model: E32-D14L Photoelectric Switch / Fiber Unit.  New Old Stock  

Omron Type: EE-SPX613 Amplified Photomicrosensor  

Omron Model: E3S-AD63 Photoelectric Switch  

Omron TL-X5E1 Proximity Switch.  New In Mfg. Box  

OMRON LY1N, MY2E; IDEC RHIB, RBMB, POTTER, Relay =

Seeka Model: F5RH Fiber Sensor 

Omron Type: E3X-A11 Photoelectric Switch  

Omron Type:  E3V3-D61 LED Diffuse Reflective.  New  Old Stock  

Omron Model: S8E1-02524D 24VDC Power Supply  

Omron Type: E3T-SL14 Microsensor, New Mini.  Photo Sen 

CCS / Omron Model: PD-1024 Power Supply.  24V, 9W.  Used Working Pull   

Omron Model: D2MC-01ELA Low-torque Basic Switch.  New Old Stock  

Omron Type: E2K-C25ME1 Capacitive Proximity Switch 

CCS / Omron Model: PDS-1012 Power Supply.  12V, 9W.  Used Working Pull   

Omron Model: S82K-10024 Power Supply.  DC24V, 0.1A.  Output: 24V, 4.2A  

Omron / STI: Model:  44532-2050 with Omron: G7SA-5A1B-DC Safety Relay   W

Omron Model: DZ-10GW2-1B Microswitch  

Omron Model: G7L-1A-BJ-CB Coil Relay.  New Old Stock   

Omron Type: H3CA-8H Timer.  99.9s to 999Oh.     

Omron Type: E8CC Pressure Sensor, PN: E8CC-AN0C  

Omron Type: EE-SX671 Optical Sensor / Slotted Interrupter.  New Old Stock. No B 

EI&S / Prime Technology: 120SS25-04 Solid State Relay.   New Old Stock  

OMRON PTF08A CONNECTING SOCKET QTY (8) IN BOX NEW  

Omron Type: H3Y-2 Solid State Timer.  New Old Stock   

Omron Model: LY2N-D2 Relay.  New Old Stock.  No Box 

OMRON TL-X1R5B1-GE PROXIMITY SWITCH.  New Old Stock   

National Model: CHP-NF-30s-DC Timer.  0.5-30 Seconds  

Omron Model: E2E-X1R5Y1 Proximity  Switch.  24 Volts to 240VAC.  New Old Stock  

Omron Model: E2EC-CR5B1 Sensor.  New Old Stock   

Omron Type: E3X-A21 Photoelectric Switch  

Seeka Model: GS5N Proximity Sensor 

Omron Model: G3NA-240B Solid State Relay.  24-240 VAC @ 40A     O

Lot of Omron MY2 Relays with Base.  24VDC.  Qty. 2   

Omron: C200H-CPU01,  SYSMAC C200H Programmable Controller w/ C200H-ME431 Mem.  

Omron Model:  C200H-OD215 Output Unit. OD215 w/ Cable   

Omron Model:  C200H-OC222 Output Unit. OC222   

Omron Model:  C200H-MD115 Input Output Unit.  MD115   

Omron Model:  C200H- BC081-V1 8-Slot + CPU Base Rack Unit    

Takex / Seeka Model: F5RN Fiber Sensor    

Omron Model: APR-S Phase Reversal Relay with Base    

Omron Model:  C200H- BC051-V1,  5-Slot + CPU Base Rack Unit    

Omron: C200H-CPU02,  SYSMAC C200H Programmable Controller w/ C200H-ME431 Mem.  

Lot of Omron Model: 3XG40 Snap Action Switches.  Qty. 5 

Omron Model: E2EC-CR8B1 Proximity Switch  

Omron Model: E3C-GE4 Photoelectric Amplifier w/Base  

Omron: C200H-CPU01-E,  SYSMAC C200H Programmable Controller w/ C200H-ME431 Mem. 

(3) OMRON Relay Socket  P2CF-11, P2CF-08 =

Omron Model: E2EC-CR5B1 Sensor  

Lot Allied Control Model: T163 24VDC Relays, 7 Pieces 

OMRON E5B2 Temperature Controller =

Omron Model: E2EC-CR5B1 Inductive Proximity Sensor.  New Old Stock   

Omron Model:  TL-KA Proximity Switch =

Omron Model: E3S-X3CE4 Fiber Optic Amplifier  

Omron Model: TL-X2MC1-GE Proximity Switch  

Lot of Omron MY2 Relays without  Base.  24VDC.  Qty. 2.       O

Omron / STI: Model:  44532-1030 Safety Relay   

Omron Model: EE-SPW321 Photo MicroSensor, 12-24 Volts  

Omron Model: E2E-X5ME1 Proximity Switch, 12-24 Volts.  New Old Stock   

Omron Model: A3GT-K511-C Panel Mounted Key Switch Unit.  New Old Stock  

Omron Model: E2EC-CR5B1 Sensor  

Omron Type: EDC2-R20J Temperature Controller w/Base  

Omron Model: G3NA-210B Solid State Relay.  24-240 VAC @ 10A     O

Omron Model: G3N-220B Solid State Relay.  20A, 250VAC.  Input: 75 - 125VAC    O

Omron Type: EE-SPZ401W-01  Light-On Optical Sensor / Switch     O

Omron Type: EE-SY671 Diffuse Reflective Sensor  

Omron Model: MY2N  Relay with Base.      

Omron Model MY2P-S Relay,  with Dayton: 5X852E Base.  250VAC / 28VDC, 10A   

Omron Model: G3N-210B Solid State Relay.  10A, 250VAC.  Input: 75 - 125VAC   

OMRON EP11PF CONNECTING SOCKET 250V 7.5 A QTY (19) NEW