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C

 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。

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。

Pacific Scientific: SRF3744-4266-84-7-56BC Motor  

Pacific Scientific PowerMax II: M21NSXC-LNN-N8-03 Motor.  New Old Stock  

Pacific Scientific PowerMax P21SNSXC-LN-NS-02 1.8o Mtr 

Pacific Scientific: E33HCHP-LNK-NS-00 1.8° Step Motor.  2.89V (DC), 7.9A (DC)  

PACIFIC SCIENTIFIC Powermax P2HNSHS 1.8o Step Motor =

Pacific Scientific  Model: SRF3643-4593-7-5-56C Motor.  Good Used Stock    

Pacific Scientific PowerMax II: M22NRXA-JDF-M1-00 Mtr. 

Pacific Scientific PowerMax II: M21NSXA-LDN-HD-02 Mtr. 

Pacific Scientific PowerMax II Mdl: P22NSHA-LNF-NS-03.  Unused Spare 

PACIFIC SCIENTIFIC H21NRHC-LDN-NS-00 1.8o Step Motor =

EASTERN AIR DEVICES LA34BJK-1R 2.5 VOLT STEPPING MOTOR 

Pacific Scientific PowerMax P21SRLB-NS-02  1.8o Motor  

Pacific Scientific Model: E33HCHP-LNK-NS-00 0 R77 SYT 1.8 STEP MOTOR *

PANASONIC N210RYBX24V4 RELAY BOX MV2C REED RELAY NEW  

Panasonic Model:  Panadac-920L Sensor.  New Old Stock   

Panasonic Model:  Panadac-920D-1 Sensor.  New Old Stock   

Panasonic NP-002E-1 Recog. Camera with Mount Bracket

Panasonic Panadac Model: N1P945BS Line Sensor.  New Old Stock   

Panasonic / Panadec NIP769 Controller, NIB

Panasonic / Matsushita Model: M6GA12.5M Gear Head 

Panasonic Model:  N310P921A  Sensor.  New Old Stock   

Simpson  Model: 3324 Panel Meter.  % Conductivity of CU.  0-100.  New Old Stock 

Simpson Model: 1329,  0 - 10 DC Millliamperes Meter.   New Old Stock 

Durant / Eaton Model: 8YP33440401 120VAC Counter.  9W.  New Old Stock  

LFE Corp. Model 40, PN: CB-0431-0000 Panel Meter  R

Triplett Model: 230-M Panel Meter.  AC 0-25 Amp.  New Old Stock   

Data Tech Model: 379A (379A-0J00) 2000 Count DPM,  

Durant / Eaton Model: 4-X-2-A  4 Digit Counter.   New Old Stock  

Simpson Model: Simpson 606 Multicorder *W2

Simpson Model: HU-000008 Temperature Guage.  New Old Stock  

General Electric / Yokogawa: Model: 251-3 AMP Meter 0-15A DC.   New Old Stock   

Lot of 3 Cinch 57-40500 Connectors, Box 5 Each, New 

KIRCHNER & TOCHTER SGK 4 G1/4" NITROGEN FLOW METER NEW 

Jewell: MS2T Panel  Meter, PN: 8852TH.  Range:0-15 ADC.   New Old Stock 

Durant / Eaton Model: 5-X-1-1-R Counter.  No Hardware.   New Old Stock  

Hecon -/- Danaher  A6495005 6-Digit Counter. New Old Stock.  No Box   

LFE Corp. Model 4424 Temperature Range Controller.  B

Simpson: 1327.   0 - 1000 Watts Panel Meter.  Range:0-1 DCMA.  Good Used Stock 

Durant Model: 6YE-40724 Six Digit Counter.  28VDC. 9 Watts.  Tested Good  

API Instruments Model:7035 Shielded  I/C Type J T/C Panel Meter  

Modutec Model: 2900-0049-18 Capacitance / Conductance  Panel Meter  

Durant / Eaton Model: 5-X-1-1-L Counter.  Order #: 400272401.  New Old Stock  

Automatic Timing & Controls: 5700A102A00XX. Elapsed Time Indicator. Unused Old  

Veeder-Root  Model: 779006-715 Counter.  12 VDC, 15W.    

MODUTEC TORR GAUGE GP 10-1000 CALIBRATED FOR N2 NEW  

Simpson: 1327.   0 - 1000 Watts Panel Meter.  Range:0-1 DCMA.  New Old Stock 

Parker Series 2A Cylinder, Model: 01.50 C02AU14AC 5.00.  New Old Stock.  No Box 

Parker Model: 14R113FC Pneumatic Regulator with Gauge    

Parker Model: F1220S Flow Control Valve.  3000 PSI.   

Lot of Parker Model: 2BC2-316 Bulkhead Union A-Lok Instrument Fittings, Qty. 10 

Parker Model:  4-4  HV-SS Double Unions.  New Old Stock   

Parker Fluidpower Model:  F-600-B Brass Flow Control Valve.  New Old Stock 

Tox Pressotechnik Kraft-Paket Model:  S02.30.100.12.00.US Power Package Cylinde 

Parker Model: GV-L-3E-NK GV Gemini Servo w/ 01-017939-01 Term. Block & Cable  H

Parker Model: EVM32 Expansion I/O Module, Product #:     H

PARKER Skinner Valve VF562960, NEW =

Parker Model: F800S Flow Control Valve.  5000 PSI.  New Old Stock.  No Box  

Parker Model: GV-U6E-NK GV Gemini Servo w/ 01-017939-01 Term. Block & Cable  H

Parker "B"  Series Ball Valve, PN: 8V-B8LJ-SSP-C3  

Parker Model:  71-016949-02 Cable.  Rev. D   H

Parker / Compumotor TQ10-EHS Torque  Servo Drive w/Hea 

Parker Model: PRM3PB25KN Pressure Control Valve with Liquid Filled  Gauge    

Parker Cylinders Series 2A Cylinder, Model: 02.00 CH2AUS18AC 1.000     

Parker Cylinders Series 2A Cylinder, Model: 04.00 C2AU14A  7.000 

Parker Model: FM6DD Pressure Control Valve.  6000 PSI     

COMPUMOTOR 71-002155-14 REV W BOARD 61-002154-04 REV D PCB  

Parker / Daedal: 008-9398 w/ Motor, Controller & Cbls 

Parker/Daedal: X or Y Stage,  Motor, Controller & Cbls 

Parker / Daedal: Motion Control Joystick, No Model # 

Parker / Daedal: Motion Control Joystick, No Model # 

Parker Model: .56DSRM01.0 Pneumatic Cylinder  

Parker Model: 1.50DPSR01.0 Pneumatic Cylinder   

COMPUMOTOR 71-002155-14 REV J BOARD 61-002154-04 REV B PCB  

COMPUMOTOR 71-002155-14 REV M BOARD 61-002154-04 REV B PCB  

Parker Series 2MA Cylinder, Model: 02.00 F2MAU14A 3.000.  250 PSI Envelope Pre W

Parker Model:  S83-962-MO Stepper Motor   W

PARKER F800S 11CD HYDRAULIC VALVE 5000PSI *W

Inland / Nippon Model: PJ80A2-20 Stepper Motor.   1.68 Ohm/Phase   

Parker Model: 4F-B6XJ-SSP Balll Valve  

PARKER CPI Coupling 6F-Q6CY-SSP =

Set of Two Parker Model: WD398667 A Air Actuators  

Set of Two Parker Model: HD384159 A Air Actuators  

Set of 2 Parker Model: WD396279 A Air Actuators  

Sew Eurodrive: MDV60A0015-5A3-4-00.  MOVIDRIVE  AC Motor Drive w/ USS21A Opt.  W

Parker Model: 4-4 CBZ-SS -  ?" OD to ? NPT, 316SS Male Elbow.  New Old Stock   

Ihara:  3/8 Compression to 3/8 Compression to 5/8 NTP T. Conn. New Old Stock  

Parker Model: C400B Brass Check Valve.  2000 PSI   

PARKER FAST & TITE  ME ELBOW FITTINGS 3/8, 24  NEW  

Lot of Parker Hannifin PR252H0000 Pitson Cylinder Kits 

AFAG Model: LM32/400 Pick and Place Pneumatic Cylinder   W

Parker Model: 27WM, Part Number: 4Z (A) -MB4XPFA-SSP Valve.  2500 PSIG @ 100°F  

Parker Series 2A Cylinder, Model: 02.50 BB2AU14A 8.000. 

PLC Direct Model: D4-06BNX Six Port Expansion Module  

Parker Model: 0737BC Filter.    

Parker Series 3H Heavy Duty Hydraulic Cylinder.  Model: 07.00 HH3H CT33A 24.00  

Parker Model: 07R313AC Prep-Air II Regulator    

Tox Pressotechnik Kraft-Paket Model: K4.100.10 US  Air Oil Cylinder    

Mead Fluid Dynamics Model: CSV-102LS Two-Handed Control Valve   

PARKER PS405 POLYCARBONATE FILTER BOWL QTY (9) NEW  

Parker Polyyflex Hose Model: 2440N-04V34.  48.00 Inches.  New Old Stock.  

Lot of Parker Model: P316 1/8" Tubing to 1/8"  Bulkhead Connections.  Qty. 5  W

Parker FluidConnectors 6F-Q6CY-SSP Quick Coupling  

Lot of Parker Fast & Tite Tee Unions.  3/8".  Qty 3.  New Old Stock.  No Box  

PARKER CPI-4-316 AIR PNEUMATIC VALVE NEW  

ELMEQ B.V. A06GM805BG234 LAL3206-050-24VDC+BEH 0 40-IP44 ELECTRIC ACTUATOR  

Parker Model: 003371002 Brass Micrometer Flow Control Valve.    W

Parker Model: 4MRT4N-316,  A-LOK Male Tee.  New Old Stock    W

Parker /  Compumotor Model: A/AX57-83  Servo Motor  

Lot of Parker NSF51 / 61 TrueSeal Union Connnectors,  Qty 6.  New Old Stock.  

Set of Two Parker Model: WD07626 A Air Actuators  

Lot of Parker NSF51/ 61 TrueSeal Union Connnectors, Tee  Qty 3.  New Old Stock 

Parker Series 2AN Cylinder, Model: 02.50 JANU19 5.000 

Parker Model:  D3W1CNYC 14 Directional Control  Valve    

Parker Model:  D3W8ENYC 14 Directional Control  Valve    

Parker Model: PRM3PP25K Pressure Control Valve with Liquid Filled  Gauge    

Parker Model: FM3DD Pressure Control Valve.  3000 PSI     

Parker / Compumotor Model: VM50.  50 Pin Break Out w/Cable.  PN: -013015-01  W

Parker Filtration Model: 932645Q Filter Element  

Lot of Parker A-LOK Fittings, Model:  3MSC2N-B  Qty.2.  New Old Stock   

Yamaha Model: RGU-2 Regenerative Unit Robot Controller   W

PARKER SERIES 2A 10.00 CJB2AU14AC-3.000 CYLINDER 250 PSI AIR  

Parker Hannifin Model: KD045708 A Pneumatic Cylinder  

Parker Directional Valve w/ (2) F71XVBG023A, (2) PS378166P Mouted to Manifold  

Parker / Compumotor Model: CA090-00602B Servo Amp.   

Parker Compumotor A Series MicroStep Drive Motor, =

Advantage AF / Parker: AFFA04EBC, PTFE/PFA Filter Cart 

Lot of Parker ?  Thermoplatic Bulkhead Connectors.  New Old Stock.  Qty. 6 

PARKER COMPUMOTOR 71-007141-22 71007141-22 61-007140-22 REV A BOARD  

Parker Series 2MA Non-Lube NFPA Air Cylinder Model: 01.50 CBE2MA3U18AC 34.00.  W

Parker Model: SRM-1 Reed Switch.  New Old Stock  

Parker Skinner Valve Division P/N: 7K518 Valve Repair Kit.  New Old Stock.    

Parker Model: F600S Hydraulic Flow Control Valve.  5000 PSI  

Parker / emecanique Model: PS1E28102B Micro Valve.  New Old Stock  

Parker Model: F600S Hydraulic Flow Control Valve.  5000 PSI.  New Old Stock   

PIC Design 4" Travel Linear Stage / Table.  Mdl. Unk. 

Taiyo / Parker Model: R0000070-1 5-Way Valve, 5DD-M5E 

Kulicke & Soffa Bond Head Servo Motor Encoder Kit for 4206 & 54, P/N: 14554-00  

Parker:  E-z Mate 5/8" Coupling.  New Old Stock.  No Box  

Mead Fluid Dynamics Model: LTV-EH-B Air Valve.  5 Port   

PARKER CYLINDER C2H24 =

Parker Model: 03.25 CJ2ANU19AC 5.000 CYLINDER SERIAL NO. HC318504 A *W2

PLC Direct by Koyo D4-16TD2 16 Point Output Module  

PLC Direct by Koyo D4-16NE3 16 Point Input Module  

Parker Model: C1200B-10LE Hydraulic Check Valve.     

COMPUMOTOR 71-002155-04 REV B BOARD 61-002154-04 REV A PCB  

Tox Pressotechnik Kraft-Paket Model: K 2.00.50.04 Air Oil Cylinder    

COMPUMOTOR 71-002155-14 REV C BOARD 61-002154-04 REV B PCB  

Parker / Schrader Bellows Model: B4G6AB553F Valve.  ?" BSP.   New Old Stock   

Parker Model: CR4421-L Linear Slide / Table ST C/R MIC,  X-Y w/ Lock   W2

COMPUMOTOR 71-002155-04 REV Q BOARD 61-002154-04 REV A PCB  

COMPUMOTOR 71-002155-03 REV B BOARD 61-002154-03 REV B PCB  

COMPUMOTOR 71-002155-14 REV Z BOARD 61-002154-04 REV B PCB  

PARKER Hannifin Shutoff Valve 1FGC80, NIB =

Parker Model: PS2982B53P Solenoid Valve Repair Kit *

Parker Cylinders Series 2A Cylinder, Model: 06.00 CH2AU34A 7.00.   250 psi Air  

Parker Compumotor M57-83 Code H,  =

PARKER Compumotor AX83-93   =

DataLogic Model: HS860B Parallel Controller    

Parker Model: B35VBB553C Pneumatic Valve.  150 PSI Max.  

Lot of Parker Thermoplatic Fitting, Fast & Tite P5MC4.  Qty. 25.  New Old Stock 

Parker Model: PS2930155P Pneumatic Valve w/ L0287513 Control  Knob.  150 PSI  

PARKER 3FGC80 SOLENOID VALVE 24V DC TYPE 3F NEMA 1 NEW 

Lot of Parker 4 FNV-SSR 316L SS Vacuseal High Purity  

Yamaha Model: YMS5506BK-300 Rod Type Single Axis Robot Cylinder    

Parker Schrader Bellows  Model: 32501000 Flow Control Valve.    

PARKER Series 2H Model 02.50 C2HT24 7.00 Cylinder =

Parker Model: B355BB553C Valve.  1/8 DS 4W 3PO 120VAC.  New Old Stock.   

Compumotor Plus Model: CPLX-DRIVE  Servo Controller.  New Old Stock   

(5) PARKER VacuSeal male conector 8-6 FV-SS, NIB =

Parker / Compumotor AT6400 Indexer w/ AT6400-AUX Bd.  

PARKER CW1337 ROLLER CAM VALVE (NEW OLD STOCK)*

PARKER F820SV HYDRAULIC VALVE (NEW OLD STOCK) *

COMPUMOTOR 71-002155-14 REV E BOARD 61-002154-04 REV B PCB  

COMPUMOTOR 71-002155-14 REV H BOARD 9800968-01 61-002154-04 REV B PCB  

Parker Model: 14R1B1FC Pneumatic Regulator with Gauge    

Mead Fluid Dynamics Model: LTV-140 Control Air Valve.    

Parker Model: .75NLPBV01.0DD LP Series Pneumatic Cylinder.  Unused Old Stock    

Pack of Parker Mdl: 4-4  HV-SS Double Unions, Qty. 4  

Taiyo / Parker Model: R0000070-1 5-Way Valve, 5DD-M5E 

Parker Model: GV-L-3E-NK GV Gemini.  Used Good Spares    H

Parker Model: GV-L-3E-NK GV Gemini.  Factory Repaired    H

Parker / Compumotor AT6400-AUX1-240V Indexer.  Needs Repair  W2

Parker Model: F600B Hydraulic Flow Control Valve.  2000 PSI  

Parker Model: F400B-11DF Hydraulic Flow Control Valve.  2000 PSI  

Parker Model: F200B  Hydraulic Flow Control Valve.  2000 PSI  

PARKER 03.25 KJ2MAUS13A19A 8.000 SERIES 2MA CYLINDER  W

Parker Model: XR057-370FT-AP23M-A Rotary Actuator  

Parker: XR057-370FT-AP23M-A Rotary Actuator, Used  

Parker Model:  D1VW4CNYCF 72 Control Valve with Parker D61VW1C4NYCF 72    

Parker Hydraulic  Model: BD15AAA-NE-2.5 w/ 801234-AAA-NR w/ Subplate / Mani  

Parker Model: P1E-M080MC-0610 Pneumatic Cylinder.   K

Parker Model: P1M063VDMA7H020 Pneumatic Cylinder.   K

Parker Model: P1M100VDMA7G160 Pneumatic Cylinder.   K

Parker Fluid Connectors Model:  XPTFL4PB6-? Flow Control Valve.  New Old Stock 

Parker Model: ETB50-B01PA23-FRBE600L Actuator Cylinder w/ SM233BR-T Motor   W

Parker / Compumotor Model: VM50.  PN: -013015-01   

Parker / Compumotor Model:  S57-51-MO-S Stepper Motor 

Parker: ETB50-B01PA23-FRBE600L-A Actuator Cylinder w/ CM233BR-115589 Motor  W

Parker Compumotor Model: M83-62, Code H Motor Drive