1756-OW16IA1756-OW16IA

 PLC的外部設(shè)備主要是指控制系統(tǒng)中的輸入輸出設(shè)備，其中輸人設(shè)備是對(duì)系統(tǒng)發(fā)出各種控制信號(hào)的主令電器，在編寫(xiě)控制程序時(shí)必須注意外部輸入設(shè)備使用的是常開(kāi)還是常閉觸點(diǎn)，并以此為基礎(chǔ)進(jìn)行程序編制。否則易出現(xiàn)控制錯(cuò)誤。

在PLC內(nèi)部存儲(chǔ)器中有于輸入狀態(tài)存儲(chǔ)的輸入繼電器區(qū)，各輸入設(shè)備（開(kāi)關(guān)、按鈕、行程開(kāi)關(guān)或傳感器信號(hào)）的狀態(tài)經(jīng)由輸入接口電路存儲(chǔ)在該區(qū)域內(nèi)，每個(gè)輸入繼電器可存儲(chǔ)一個(gè)輸入設(shè)備狀態(tài)。PLC中使用的"繼電器"并非實(shí)體繼電器，而是"軟繼電器"，可提供無(wú)數(shù)個(gè)常開(kāi)、常閉觸點(diǎn)用于編程。每個(gè)"軟繼電器"僅對(duì)應(yīng)PLC存儲(chǔ)單元中的一位（bit），該位狀態(tài)為"1"，表示該"軟繼電器線圈"通電，則程序中所有該繼電器的觸點(diǎn)都動(dòng)作。輸入繼電器作為PLC接收外部主令信號(hào)的器件，通過(guò)接線與外部輸入設(shè)備相，其"線圈"狀態(tài)只能由外部輸入信號(hào)驅(qū)動(dòng)。

鄭娟萍

廈門(mén)仲鑫航自動(dòng)化設(shè)備有限公司 

 PLC的各種功能主要是通過(guò)運(yùn)行控制程序來(lái)實(shí)現(xiàn)。編制程序時(shí)，需要合理使用PLC提供的編程元件（即軟元件）。FPO型PLC中常用的編程元件有兩種：位元件（bit）和字元件（word）。位元件實(shí)際上是PLC內(nèi)存區(qū)域所提供的一個(gè)二進(jìn)制位單元，又被稱為軟繼電器，主要用作基本順序指令的編程元件，如輸入繼電器Xn、輸出繼電器Yn、內(nèi)部通用繼電器Rn、定時(shí)（計(jì)數(shù)）器等，其參與控制的方式主要是通過(guò)對(duì)應(yīng)觸點(diǎn)的通斷狀態(tài)改變影響邏輯運(yùn)算結(jié)果即輸出。

    字元件則為PLC內(nèi)存區(qū)域內(nèi)的一個(gè)字單元（16bit），主要用作功能指令和高級(jí)指令的編程元件，通常用以存放數(shù)據(jù)，如數(shù)據(jù)寄存器DTn，定時(shí)(計(jì)數(shù))器的設(shè)定值SVn、經(jīng)過(guò)值EVn等。字元件沒(méi)有觸點(diǎn)，通常以整體內(nèi)容參與控制。

Allen Bradley Renewal Parts Kit SP-192705 SP192705 NEW

OPTO 22 OPTO22 RELAY CIRCUIT BOARD CARD PB8DAAD 001508B

NEW Accu-Coder Incremental Shaft Encoder 716-D 5VDC

Veeder-Root 7792 Veeder Root 779200-001 Optical Pulse Generator 779200001 New

In Express 100BASE-TX Stackable Hub 12 Port 100-240 V Volt 5-3 A Amp 47-63 HZ

STERLING STERL-TRONIC TEMPERATURE CONTROL CONTROLLER KEYPAD M-2 M2

BARBER-COLMAN TEMPERATURE CONTROLLER 5743-09029-430-3

SQUARE D ABB CIRCUIT SHIELD OVERCURRENT RELAY 51Y 51 Y 443S2230 48V

NEW EMECANIQUE COIL SUPPRESSOR MODULE 023306 LA4 DA2U 110-240V AC LA4DA2U

sor Tubular Antenna 719-0016-01 719001601 Used

GE GENERAL ELECTRIC HAND OFF AUTO PILOT SWITCH CR2960-SY-103-A CR2960SY103A 600V

NEW LOT OF 500 DINNECTORS PRINTED MARKING TAG FOR DN-T12 DN-LA100 DNLA100 5MM

OMEGA TEMPERATURE CONTROLLER TEMP CONTROL CN1200 CN1201-A2 120V 60Hz 6VA

GE Pushbutton Enclosure CR2940BC 7" L X 4" W X 3" D 1-3-16" DIA Top Hole New

Lot of 2 IFM Efector Sensor II5479 IIA3010-BPKG/BS 10 mm f 10-36V dc 250 mA New

Turck Proximity Sensor BI 5-G18K-AP6X 30MM BI5G18KAP6X30MM 10-30 VDC 200 mA New

LOT OF 20 NEW ALPHA 40 PIN SOCKET FCC-210-40 FEMALE

PNEUMAX 9230301200 Pneumatic Valve 412/1.52 0.12 1/2"NPT 24VDC New

NEWPORT DC VOLT METER VOLTMETER 400AS-3 A3 115V 6W

Fibro Gas Spring Pneumatic 2479.030.00000.070 20-150 Bar New

Samson Pneumatic Indicator 3416 3416-100501020103.00 15 PSI New

Lot of 10 Breeze Power Seal Hose Clamps 64104 All Stainless 4-1/8-7 MM 105-178

ALLEN BRADLEY RELAY 700-HA32Z24-4 24 VDC SER C W/ BASE 700-HN202 SER A

EDI Cartridge Heater M6-090G3-2-350 350 Watt 240 Volt E83858 3/4" Dia 9" L New

Omron Input Unit C500-ID218 3G2A5-ID218 24 VDC 10mA Used

NEW WATLOW FIREROD HEAT ELEMENT J9P5-D6 220V 2250W 2250 WATT 1/2" DIA 10" L

Dynapar Encoder HR62503600100 3/8 SHT FLG MT 5-26V End

RIETER TEMP HEATING CONTROLLER 1850 649 1850649 NEW

SIEMENS ADAPTOR BUSBAR 8US1 111-4SM00 8US1 251-5DM07 RITTAL SV-3442

Allen Bradley Programmable Timer 700-FS-100JU23 Ser B 240VAC 48VDC 3A 3 A Amp

No Name QTX1.7/16SYL Bushing QTX1716SYL New

SIEBERT CONTROL DISPLAY  COUNTER SQ600-405-1 SQ6004051

BALDOR LECTRON D72 SOLID STATE MOTOR CONTROL 3PH 208/230/460 MAX FLA 30A 30 AMP

NEW CARLON PLASTIC JUNCTION ENCLOSURE BOX LID E970C  LID970C

LOT OF 5 IDEC CIRCUIT PROTECTOR NRAS1100 TK2170 NR21 3 FL AMP A 3A 3.75 T AMP  

MOELLER PKZM 1-16 MOTOR START W/ AUX.CONTACT NHI11 

SICK 30" LIGHT CURTAIN RECEIVER LGTE075-291 LGTE075291 1-013-422

ABB/HART 600T PRESSURE TRANSMITTER 614EGE21010G8111 55 VDC 2030 PSI NEW

New Allen Bradley Motion Detector Module 60-1797 601797 Ser B .5-15 Sec

MALLORY CGS 3600 MFD 400 VDC CAPACITOR 12-712413-00

RCA Tube C1K NEW

MAC SOLENOID VALVE 6341D-211-PM-111DA 6341D211PM111DA 

KENRICK 6062000000 SET OF 4 SHEPHERD CASTOR 2 1/2" BODY

NEW LOT OF 46 NO NAME TEST PROBE SPR-4W SPR4W

NEW ALLEN BRADLEY CURRENT TRANSDUCER KIT 140534 LEM MODULE LF50-S/SP3

(51) WAGO 231-606 TERMINAL BLOCK 2310606 250V 12A

NEW HONEYWELL SENSOTEC PRESSURE TRANSDUCER TJE/B526-02 TJEB52602 150 PSIA 10 VDC

KOOLTRONIC KA4C2.0HSL 115V 1PH COOLING 6.7 F.L.A. 50-125°F AC AIR CONDITIONER

TAWD-M TAKEMOTO CIRCUIT BOARD CARD NO. 1586

SQUARE D NEMA 4 CLASS 8536 TYPE F0-1 SERIES A FOR 4321-51 600V ELECTRICAL COIL

Sumtak Optcoder LEI-037-500 LEI037500 LEI-038-500

6 New Electro USA 0541 Switch 6 Amp 125 VAC 3 Amp 250 VAC

RELIANCE P56X1526H 1/2HP 1/2 HP 230/460V 3 PHASE 3PH XE ELECTRIC MOTOR 5/8 SHAFT

BIOSYSTEMS CANNONBALL 2 ATMOSPHERIC MONITOR 1705A

ALLEN BRADLEY POLYWEDGE KEYPORT INTERFACE 27994 NEW

Foxboro Movement Pulley Wheel M125KM

Carter Helium Laser Light LGL100SN Used

TYCO P&B 27E123 10A 240V 11PIN OCTAL RELAY SOCKET SCREW TERMINAL NEW

Square D MCC Bucket Model 6 15364997-001.001 Size Sz 1 10HP 10 HP 15 Amp Breaker

HY-CAL CT-880-AN-U-(50/100F)-X21 8940 TEMP ENCODER 

NO NAME HCG F5A 330 MFD 400 VDC 31F9 CAPACITOR

GE STEP VOLTAGE REGULATOR CONTROL VR-1 7620/13200Y 416KVA 546A B081G04

 Lot of 3 Seeq Intergrated Circuit DQ2764-20  8714  DQ276420 

NEW OMEGA OS65-AWC AIR/WATER COOLING JACKET-PYROMETER

Crown SCR Electronic Control 94801-00R-1  9480100R1 

SELET BQM15/5PAKL BLOCK TYPE SENSOR NEW

(2) Allen Bradley Suppressor 120630 610275-52R NEW 

MCNEIL & NRM PRESSURE SWITCH W3-21125-132 W321125132

NEW ALLEN BRADLEY TRANSISTOR KIT 142512 PRX POWER BLOCK KD621220 KKSF66U2050API

FESTO CPX-AB-4-M12X2-5POL CONNECTOR BLOCK FOR MODULAR NEW

Rice Lake Load Cell Sensor RL40BBS-2.5K RL40BBS25K 1.996 mV/V @ 2.5K lbs Used

Electro Cam Plus Top Side Bayoent Connector Foot Mount 3/4" Shaft PS-5275-11-ADS

NEW 10 PC THOMAS & BETTS T&B CONDUIT HANGER CLIP ZCK3/4 

NORGREN PNEUMATIC CYLINDER 40MM 945MM M/46140/M/945

Siemens 3TF2010-0AK6 Contactor 3TF20100AK6 120V W/ 3TX4412-1A 22E Contact Block

(3) SOLUS MOUNTING ROD VG-215-06-12T MC VG2150612TMC 1/2"OD S/S STAINLESS STEEL

NEW NO NAME WHITE EMERGENCY LAMP LIGHT HEAD D69W 6 VOLT 9 WATT 19-2-0045

NEW RASMI SINGLE PHASE RFI FILTER FFR-S520S-14A-RF1 152736 14 AMP A 14A 250V 

WESTINGHOUSE/AB DE-ION TRIP UNIT HKA3175T  3 POLE 175A 175 A AMP 

REIKOTRONIC EPROMPTER RT5014TFT003 lcd video monitor

NEW BRYANT AC SWITCH W-S-896 WS896 15 AMP A 15A 120/277 VAC 

NEW LOT OF 3 HUBBELL I-STATION WALL FACE PLATE IFP16W 1 GANG 6 PORT WHITE

GE GENERAL ELECTRIC STEP VOLTAGE REGULATOR CONTROL VR-1 76.2KVA 100A 7620/13200Y

New No Name Motor Brush EH Lot of 2 L: 1" W: 25/32" H: 25/64" 

NEW ANVER ADJUSTABLE FLOW TUBE FT075 0.75" BORE

HOLOPHANE COIL BALLAST EC-3751 EC3751 250WI IPS 070199

Schrader Bellows Hydro-Check Cylinder  B17121022 4.00 rebuilt

NEW BALLUFF PROXIMITY SENSOR WITH CABLE BES02EU BES 515-326-S4-C BES515326S4C

EMECANIQUE XU5-M18MB230 PROXIMITY SWITCH 240V 

SIEMENS REVERSING STARTER 3RV1021-0HA10 0,55-8A w/ 3RT1023-1A 110V COIL 

HONEYWELL TEMPERATURE CONTROLLER DC3004-0-00A-1-00-0111

VACON X SERIES PLASTIC DRIVE INVERTER COVER 17-1/4" X 10-5/8"

IH Co Heater Band B-38194 B38194 800W 230V 4.25" ID X 4" Termbox New

ADVANCE RAPID START LIGHTING LIGHT BALLAST 277V VC-2S85-TP VC2S85TP

SIEMENS P1 P1C30NB100ABS 250A 250 A AMP MAX 208Y/120V 3PH 4W BREAKER PANELBOARD

SKF 025408 BEARING NEW

(9)No Name Brass Bushings .563"OD .312"ID .965"L .693 F

KEY TECHNOLOGY MONOCHROM CAMERA 801798 701324-1 701325-001

INTERROLL 36:1 31328 24V DC BRUSHLESS DRIVEROLL CONVEYOR ROLLER NEW

Festo Air Logic Valve and Gate ZK-1/8-B ZK18B 10 Bar New

ELEKTRA-LINDAU Elektrische Heizsysteme Heating System

NEW Sine Control Surge Suppressor 4827VF4-4 Type 12&13

NUM ADAPTATEUR CONVERTER TTL-RS 485  205201339-0188  TTLRS485

OILGEAR OIL GEAR L404929-002 TRANSDUCER AMPLIFIER New

Electronic Enterprises Electronic Electron Vacuum Tube 6AS7GA 8 PIN New in Box

Caterpillar Plate Assembly 377605 New

LITHONIA S50 LIGHTING FIXTURE 250W 120V 2.80A BALLAST

SAFTRONICS AA1060 CALIBRATION CARD 

NEW BINKS SS SEAT SERVICE KIT 862045

Pulsafeeder Pulsatrol MCT310BFL2 w/ Zoom Power Cube 

UNKNOWN BRAND ELECTRICAL ENCLOSURE 37X31-1/2X10-1/2 37" x 31-1/2" x 10-1/2" 

Doloc Valve 0663153 1/2" NPT Used

New Waldom Electroswitch Rotary Switch D4G0205N-P 2P

Fuji JIS C1731 FRC-15-40 Current Transformer 1150V 15VA

emecanique Body Contact ZCKM1 240/500 Vac 3A 3 A Amp New

NEW CERUS THERMAL OVERLOAD LUG MTK-63/3K 40L MTK633K40L

Fritz Kubler Incremental Encoder 5822.191302 5822191302 5 VDC 90mA New

HONEYWELL P246A-1009-1 STATIC PRESSURE SWITCH 

ALLEN BRADLEY KWIKLINK KWIK LINK CABLE 1485K-P1F5-R5 A

NEW ALLEN BRADLEY 800MS-P16R  PILOT LIGHT / RED 120V 800MS-P16 SER D BULL 800MS

BBC Brown Boveri Input Module GH-R521-0000-VO 

Ashcroft Transducer ASH-K1-7-M02-15-F2 ASHK17M0215F2 30 PSIG 1.0% 1/4" NPTM New

New emecanique Component Single Plate AK5PA231H7

Muller-Electronic Microprocessor Temperature LR-2-TK

New Alcon A-C7984 38 7/94 A-C7984387/94

SCHMERSAL INTERLOCK AZM 170-11ZRK-ST-2111-1/2197 110V

NO NAME ELECTRICAL ENCLOSURE 32"x16"x11" W/ 250A 250 A AMP BREAKER DISCONNECT

2 BOSTON GEAR SPLIT SHAFT COLLAR CSC187 1-7/8" ID

Veeder-Root 651810-600 Inductive Proximity Switch New

5 THOMSON SK3721 PNP GE TRANSISTOR RF/IF AMPLIFIER NEW

Martin Sprocket 80BS15 1-5/8" 80BS15158 New

Ogden Ceramic Heater Band CBE0420XK  600W 600 W 230 V Volt New

WIELAND BAMBERG WEB 1001 99.823.5257.0 MODULE W/ RELAYS

Cutler Hammer Timer Solenoid D80AMA D80AM Series A2 120 Volt New

Allen Bradley 8-Channel Analog IFM Terminal 1492-AIFMB-3 1492AIFMB3 Series A 

Taylor Industrial Thermometer 200-400°F 95-205°C New

SIGNET GPM GALLONS FLOW MONITOR COUNTER/TOTALIZER GEORGE 3-5100 35100

NEW DAVEY COMPRESSOR 3PC HIGH PRESSURE CLUTCH DRIVE PLATE A-3507-S A3507S

Z-WORLD PROTOCOL SWITCH ENCLOSURE BOX CASE PS-ENC PSENC NEW

(10) Entrelec Jumper Bars 016851625 1SNA168516R2500 Interconnexion 2 X 6 2P  New

IPC Dynamic Breaking Resistor 005-4200P 0054200P 100OHMS 100W

GE L4MD40S1M5 LAMP BALLAST ASSEMBLY 400W 120V 4A A AMP

SQUARE D SURGELOGIC SURGE TVS4XF80A 80kA 480Y/277V NEW

National Electronics Electron Vacuum Tube 6AK6 7 PIN New in Box

Yaskawa Servopack Servo Pack SGDA-A2CS SGDAA2CS 24 V Volt VDC 1-2 A Amps 20 Watt

ROSEMOUNT 1151GP8E12M1B1 PRESSURE TRANSMITTER W/ PERCENT GAUGE 0-1000 PSI CAL.

NO NAME STAINLESS STEEL S/S 47"x23-1/2"x12" ELECTRICAL ENCLOSURE W/ BACK PLATE

NEW KIPP CLAMP LEVER CAP HANDLE METAL M10-1.5 THREAD FEMALE 

SCIENTIFIC COLUMBUS RMS CURRENT TRANSDUCER 4074A

Graphic Control Blue Chart Recorder Pen 82-35-1013-03 8235101303 Lot of 3 New

BULLDOG ELECTRIC BP-351 BUS PLUG SWITCH 30A 600VAC 3 WIRE BP351

IBP Pietzsch GmbH Incometer 87 000 10 114 8700010114 Erzbergerstra?e 115/117 

New Holophane Refractopack Relamp Light RPAK400MH12S

Temposonics LDT Position Sensing Systems 011018050

SYLVANIA METALARC SUPER SAVER LAMP MS360/SS/BU-HOR MS360SSBUHOR 360 WATT 360W

Heat Band 1S 400-150 LA 1S400150LA 625W 460V 18 FBG

SKF Bearing Adapter Assembly SNW 17X3 SNW17X3 SNW 17 X 3" New

  NEW Reliance Current Loop Driver CLDC 0-51865-2 

FOXBORO MAGNETIC FLOW TRANSMITTER 120V 15VA E96P-IA E96PIA CS-E/FN-A

Allen Bradley Steady Incandescent 855T-B10DN5 Ser B 120 VAC 7 Watt New

MICROAMPERS 0202 SHIELDED METER LFE 20-3602-0100 NEW

Danaher Dynaper Rotopulse Encoder 62PNDF-0240-T 62PNDF0240T Used

NEW ALFLEX X100001001 1" LIQUID-TIGHT EXTRA FLEXIBLE METAL CONDUIT 55 FT FEET

NEW BRYANT AC SWITCH W-S-896 WS896 20 AMP A 20A 120/277 VAC 

NEW BRYANT MALE LOCKING CONNECTOR PLUG 72120-NP 72120NP L21-20 4 POLE 5 WIRE 

ISSC Kanson Motion Detector 1214-1-K-B 12141KB .6-100 Sec 115 Volt 10 A Amp Used

NEW LOT OF 4 CARLTON PVC CONDUIT BODY E987D 1/2" 

SERVO-ROBOT CIRCUIT BOARD CARD SR9610CDU

Unknown Celsius Temperature Probe Thermometer 0-160°C

Sensotec Load Cell D/6269-01 D626901 0-7000 lbs Range Used

Ingersoll Rand Pressure Transmitter 206120-IR4 1X13775 C206 200 PSIG 24 VDC New

YASKAWA PC BOARD JANCD-MCP02B-1 REV.D0  MCP02B w/ JANCD-MM104 REV.D2

ALLEN BRADLEY 800T-P16 800TP16 SERIES T 120V 50/60Hz RED PILOT LIGHT NEW 

MTI Weigh Systems Load Cell BLC-2.5K-20 BLC25K20 2500 lbs Used

Allen Bradley Powerblock 140142 120 782 11B4 12078211B4 460V 40-50HP New

NEW NO NAME ALUMINUM HEAT SINK 3-13/32"x 3-5/32"x 1-27/32" 

ALLEN BRADLEY SPEED CONTROLLER 160-BA03NPS1 SER B FRN 6.00 0.75KW/1HP 380-460V 

Chromalox 4-Digit Temperature Control 2110 120-240 VAC Used

NEW NO NAME MOTOR BRUSH FY T606 2-9/32"L 1-1/2"W 3/4"TH

MOELLER PKZM0-0,4 MOTOR PROTECTOR SWITCH 0.25-0,4A SER NO. 04 PKZM004

Isco Rechargeable Nickel-Cadmium Battery 60-1684-040 14 VDC 16 HRS @ 400mA Used

Keytron Dual AC Current Sensor CS100B New

LAZERDATA LAZER INDUSTRIAL BARCODE SCANNER SERIES 9000 LD90810 

Diversified Phase Monitor PBC-575-ALE 500-610 volt

Newport 2000 Voltmeter 2000A-2 A3,D2 115VAC 2000A2

RED LION CONTROLS IMT IMT00002 ALARM TOTALIZER PANEL METER

NEW LOT OF 46 REMINGTON CONDUIT CLIP 100763 3/4" 19MM 

DIXSON BEW51AJYX50MVDCV8056 AMPERAGE METER GAUGE 0-10

Nachi Printed Circuit Board UM127 Used

BARKSDALE PRESSURE SWITCH D1S-H18SS-B2 60 PSI 4.14 BAR D1SH18SSB2

WESTINGHOUSE AUXILIARY CONTACT INTERLOCK 180C138G19 - USED

BALLUFF BOS00LW BOS 18KW-PA-1QC-S4-C PHOTOELECTRIC SENSOR W/ MOUNTING BRACKET