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PLC梯形圖中的某些編程元件沿用了繼電器這一名稱，如輸入繼電器、輸出繼電器、內部輔助繼電器等，但是它們不是真實的物理繼電器(即硬件繼電器)，而是在軟件中使用的編程元件。每一編程元件與PLC存儲器中元件映像寄存器的二個存儲單元相對應。以輔助繼電器為例，如果該存儲單元為0狀態(tài)，梯形圖中對應的編程元件的線圈“斷電"，其常開觸點斷開，常閉觸點閉合，稱該編程元件為0狀態(tài)，或稱該編程元件為OFF(斷開)。該存儲單元如果為1狀態(tài)，對應編程元件的線圈“通電"，其常開觸點接通，常閉觸點斷開，稱該編程元件為l狀態(tài)，或稱該編程元件為ON(接通)。

    2)根據(jù)梯形圖中各觸點的狀態(tài)和邏輯關系，求出與圖中各線圈對應的編程元件的ON/OFF狀態(tài)，稱為梯形圖的邏輯解算。邏輯解算是按梯形圖中從上到下、從左至右的順序進行的。解算的結果，馬上可以被后面的邏輯解算所利用。邏輯解算是根據(jù)輸入映像寄存器中的值，而不是根據(jù)解算瞬時外部輸入觸點的狀態(tài)來進行的。

手機

： 

 Qq:

鄭娟萍

廈門仲鑫航自動化設備有限公司  

本裝置為兩種液體混合裝置，SL1、SL2、SL3為液面?zhèn)鞲衅?，液體A、B閥門與混合液閥門由電磁閥YV1、YV2、YV3控制，M為攪動電機，控制要求如下：

    初始狀態(tài):裝置投入運行時，液體A、B閥門關閉，混合液閥門打開20秒將容器放空后關閉。

    啟動操作:按下啟動按鈕SB1，裝置就開始按下列約定的規(guī)律操作：

    液體A閥門打開，液體A流入容器。當液面到達SL2時，SL2接通，關閉液體A閥門，打開液體B閥門。液面到達SL1時，關閉液體B閥門，攪動電機開始攪動。攪動電機工作6秒后停止攪動，混合液體閥門打開，開始放出混合液體。當液面下降到SL3時，SL3由接通變?yōu)閿嚅_，再過2秒后，容器放空，混合液閥門關閉，開始下一周期。

停止操作:按下停止按鈕SB2后，在當前的混合液操作處理完畢后，才停止操作（停在初始狀態(tài)上）。

RS  TIMER  DTA2

GENERAL ELECTRIC 120V 3A 60HZ INSTANT START ELECTRONIC BALLAST, G3-IN-T8-120

ITT HOFFMAN SPECIALTY 3/4" NPT BUCKET STEAM TRAP B1030A

ALLEN BRADLEY DeviceNet COMMUNICATIONS MODULE MANUAL 74002-103-01 (01)

HITACHI 200V 50-60HZ MAGNETIC CONTACTOR A10

SIEMENS PROFIBUS CONNECTOR 972-0BA40-0XA0 NIB

REEL PN12-22681-01 MOTOR LOT OF 2

NORGREN PNEUMATIC CLAMP  SPUSR/980C17 102245

ABB CONTACTOR STARTER CA5  BC25 102041

UFM UNIVERSAL MH-NSF40GM-10-32V1.0 M3WR-PC4M-G-Z86

2000PSI  1/2"X1" THREADS HYDRAULIC PRESSURE REGULATOR VALVE

CHROMALOX TEMPERATURE CONTROLLER 317024

PARKER W169PLPNS-6-8 BRASS LOW PRESSURE FITTING ELBOW, 3/8 x , LOT OF 10, NNB

NUMATICS S4CC-00M3A-AVE0 COMPACT CLYINDER, 3/4" BORE, 3/4" STROKE, BOTTOM TAPPED

BONNEY FORGE 1/2" 800 GATE VALE A105N / 057643-*004 99173

THK LINEAR BEARING LM BLOCK NIB HSR25R1SS(GK)

ICC INTERNATIONAL CYBERNETICS CORPORATION AC BRUSHLESS SERVO MOTOR 120-0021-00

NUMATICS 110/120V 50/60HZ 150 PSIG-AIR SOLENOID VALVE W/ BASE, I35BA415KKP00030

ROSS W745K87 SERVICE / REPAIR KIT, NIB

MARIO PCB BOARD  P9729046

TURCK PROXIMITY SWITCH NIB BIM-INT-AP6X-0.2M-RS 4T W/M S4623593

FESTO SOLENOID VALVE 7958 *NEW*

IFM EFECTOR SENSOR OGT500 NNB

GRACO 156989 SEAT VALVE, NIB

3D INSTRUMENTS PRESSURE /THEMOMETER GUAGE 32-210F  1222-4-106A-0000-09-CA-AC-5

MODUTEC 0-150 AC VOLTS INDICATOR

LEUKHARDT BK MIKRO4 MODULE

ANDERSON GREENWOOD INSTRUMENT 2 VALVE FLANGED MANIFOLD PTMVIC4 022084-001

GRACO 101917 REPAIR KIT, NIB

PEPPERL & FUCHS MPT42HD-CM 454500 NEW

CUTLER-HAMMER 20-250VAC 260MA 3 PIN PROXIMITY SENSOR E57LAL18A2SA SER G1

RELIANCE ELECTRIC * AUX CONTACT * KIT K-603

ASHCROFT 10-30VDC 500 PSIG TRANSDUCER, K17M0142HM500

PUNCH-LOK TYPE-P 3"X5/8" STAINLESS STEEL CLAMP LOT OF 10

MICHIGAN POSTAL MARKINGS MAURICE F COLE COPYRIGHT 1955

ITT CANNON CIRCULAR CONNECTOR PLUG W/ BELDON-M CABLE M9542  NNB

TEKTRONIX PHASER 740 016-1685-00 COLOR LASER PRINTER CYAN TONER CARTRIDGE, NIB

RM 5/8"-5/8" BORE FLEXBEAM-3 FLEXIBLE COUPLING FSR24-10-10-A NIB

WESTINGHOUSE TYPE EP 1PH 240X480 TO 120/240V 25KVA TRANSFORMER S20L11S25N

INTERFACE CABLE KIT CAB-6401/A/D/PIO/AC/POWER SUPPLY CABLES INCLUDED

PHOENIX CONTACT INTERBUS CONNECTION MODULE IBS CT 24 IO GT-T NIB

KOMET ER25 4.0MM COLLET, A33540100400 *NEW*

SIEMENS SENTRON SERIES 35A 480-250VDC MAX 2 POLE CIRCUIT BREAKER ED42B035

ANTUNES CONTROLS LGP-D LOW GAS PRESSURE SWITCH MANUAL RESET 2-14" WC, NIB

ALLEN BRADLEY 509-AO* SER. B 230-240V

MITSUBISHI ELECTRIC MELSEC-Q BASE UNIT Q312B

ROTOR TOOL ?? 3/8" DRIVE ANGLE PNEUMATIC NUTRUNNER

PANALARM 12VDC RELAY W BASE WB2 70-X1

HANSON M18X2.5 (18 MM X 2.5) HEXAGON METRIC DIE, 1.438" OUTER DIAMETER, 0.504" W

STAR RUNNER BLOCK 1651-794-10 NIB

FESTO SDE1-D10-G2-R14-L-P1-M12

MARS 115V 60HZ 1PH ROTARY COMPRESSOR, EBA110111A *NEW*

LION 1 7/16-12 HS GH4

EATON CE6CB10 CONTACTOR /W C314AN3E RELAY

DODGE 1-1/2" BORE 4-BOLT FLANGE BEARING, 124085, NNB

WESPATT ROPE SHEAVE RJ 1108-4A

THOMSON BALL SPACER LINEAR BEARING GUIDE 511H35B1LZ *NEW*

GOODYEAR EAGLE NRG SPROCKET W-36S-SH NIB

PRECISION TWIST DRILL PTD 7/32" 6"OAL HSS TAPER SHANK DRILL BIT, 209 *NEW*

MODICON CONNECTOR AS-8534-000 PM-0056-001 SEALED

MORSE 25 SS 10FT RIVETED ROLLER CHAIN NIB

BS&B TF-0-0005-000 RUPTURE DISK, NIB

RED LION CURRENT LOOP CONNECTIONS, MODEL APLCL NNB

EFACEC 4.4KW AC MOTOR BF5 90L 42FS

IFM PHOTOELECTRIC SENSORS 05P500

ALLEN BRADLEY 45A 600VAC 115-120V COIL SIZE 2 CONTACTOR 500-COD920 SER. A

NORTON 6" DIA, 100X GRIT, METALITE STICK AND STAND DISC R228 *NEW* LOT OF 50

AZBIL PROXIMITY SENSOR  FL2-12B6H NIB

BRAD HARRISON WOODHEAD 4 PIN FEMALE MICRO-CHANGE CORDSET 804000A15M050 *NEW*

BURKERT 120V 60HZ 12W 14PSI 1/2IN. NPT 2-WAY SOLENOID VALVE 0256 A 3/8 FKM *NEW*

TOKUDA IONIZATION VACUUM GAUGE HFT-7

GREENLEE 48IN X 23IN X 42IN STORAGE CABINET 101898

WATTS * BACKFLOW PREVENTER 3/8 N 9 NIB * 0061886

SYLVANIA THERMAL OVERLOAD RELAY 2535 *NEW*

BROWNING TIMING BELT PULLY 40LH050

PARKER 0107-8-6 SWIVEL ADAPTER 80EH, LOT OF 17

ALLEN BRADLEY TERMINATOR PLUG 74102-405

BURNS 3/4IN. NPT THERMOCOUPLE CONNECTION WITH ROD EWSP1A1-36-3A

SIGNODE 5/8" SEAL FEED STRAPPING MACHINE MOD SFC 5823

COILHOSE * 1/2  ID 25 PNEUMATIC COILED AIR HOSE NIB * GN12-25A

SQUARE D * INDUSTRIAL CONTROL TRANSFORMER  * 9070TF350D1

RELIANCE ELECTRIC FRAME 215T 3PH 575V 770RPM 2HP XEX DUTY MASTER MOTOR 6224716

PARKER 1/2" MALE NPT X 3/4" FEMALE ADAPTER, LOT OF 9

DENSO U-GROOVE SPARK PLUG, W9EXR-U *NEW*

CKD CYLINDER RCC2-006370L-FL253387

WATTS * PNEUMATIC REGULATOR * R119-06C M2

NELSON 1AMP, 5 x 20MM FUSE *NEW* LOT OF 43

SCHNEIDER ELECTRIC YELLOW LED SIGNAL LIGHT XVB C2B8

ALLEN BRADLEY SLC 500 SOFTWARE COMMON PROCEDURES GUIDE ABT-1747-TSJ50 5.11

MINEBEA MAGNETIC BRAKE SB-45B-104 24V SHAFT DIA. 6.0MM

VICKERS * HYDRAULIC SOLENOID VALVE 24VDC * SV1104024DG

GOULD SHAWMUT FH-001AF, FUSE HOLDER, 15 A, 250 VAC, LOT OF 3, NIB

MOELLER MANUFACTURING CO. * MANUAL MOTOR STARTER * ZM-16-PKZ2

KNIGHT REPAIR KIT FOR VALVE BPA2141 *NEW, SEALED*

SMC CYLINDER CDQ2A63-35D

PARKER 5/8" NPT MALE FACE SEAL 90 ELBOW X 1-1/2" NPT F/M ORB, LOT OF 6

EMECANIQUE PUSHBUTTON SWITCH ZB2 BA2 X1 *NEW*

DELPHI OXYGEN SENSOR ES10381 NIB

THK ?? 12" LINEAR GUIDE RAIL, 12", NNB

METRIX * HN106 * PX 236

SQUARE-D * TIMING RELAY W/ RELAY SOCKET NIB * JCK1F600 / NR51

PARKER 3 1/4" OAL 88DB-24 SPLIT CLAMP *NEW*

PARKER PNEUMATIC FILTER 07E21A13AC

DENGENSHA POWER SUPPLY DGN-2

BINKS GUAGE-200# 83-387 / 0-200LBS/IN NIB

YOKOGAWA * DIGITAL AC AMMETER  * 2353 00

FUJI ELECTRIC TRANSISTOR 50L-0001-0179/30A

UFM FLOW MONITOR TYPE 12-13 01GM-2-600S-A3NR

ALLEN BRADLEY,800T-Q24B,PILOT LIGHT,NIB

RIDGID 1" NPT 6-FLUTE HAND TAP NIB 1-11 1/2 / 1 9/64

NUMATICS PNEUMATIC SOLENOID VALVE 1-10BAR  * L23BB452B000061

ALLEN BRADLEY ANALOG OUTPUT MODULE 17771-OFC USED

SQUARE-D * 60A 240VAC 250VDC SAFETY SWITCH SER.D2 * H-222 N

ADALET TRANSMITTER & ENCLOSURE BOX W / CONDUIT SEAL XJS

UFM TYPE 2 FLOW METER 5M-NSF6GM-6-32V1.0-M3WR-PC4M-C-Z86

DANAHER MOTION LINEAR MOTION 704555 NIB

MOORE PRODUCTS COMPANY 8880-19 PNEUMATIC MOTION TRANSMITTER

FESTO PNEUMATIC CYLINDER DN-50-160-PPV, 174 PSI

HELLER 20.002.613-1 BOARD

COLONIAL * 1" SCH80 90 ELBOW FITTING NNB 1 LOT OF 19 * -

CUTLER HAMMER  * BUTTON ENCLOSURE * 10250T N1

MAC DMB-DDAP-2DM1 SOLENOID PILOT VALVE, 24 VDC, 5.4 W 120 PSI, NNB

PUMP FOR BECKMAN 110 SOLVENT DELIVERY MODULE

RELIANCE ELECTRIC CONTACTOR 110V-120V NIB 271 L 11

DELPHI OXYGEN SENSOR ES10385 NIB

I-T-E EH3-S0203 POLE CIRCUIT BREAKER 480 VAC

SYLVANIA METALARC LAMP M/MS LIGHT BULB M175/U

NDH BEARING 7215 NIB

US ROBOTICS SPORTSTER 33.6K PC CARD MODEM SP1336 *NEW*

ALLEN BRADLEY FLEX I/O RELAY OUTPUT 1794-0W8 SER A REV A01

WTC CIRCUIT BOARD, PC-917A-00A A9-1122-54

WHITNEY RENOLDS 60 RIV TRANSMISSION CHAIN, 5' 9", 3/4" PITCH

VEXTA BRUSHLESS DC MOTOR DRIVER, BLD30A-F *MISSING SCREWS*

TRUPAR AMERICA 3/4" SWIVEL 0RW3655080, 3S02 *NEW*

SQUARE D BREAKER ON/OFF SWITCH

SQUARE D 100-240VAC 0.2A 47-440Hz 35VA POWER SUPPLY 8440 PS24

MASTER PNEUMATICS 3/4"NPT SINGLE POINT LUBRICATOR A6406

SALISBURY ELECRTICAL RUBBER GLOVES SZ 10 RED ANSI/ASTM  D120 TYPE I LOT OF 2

THOMAS & BETTS 3/8" LIQUID TIGHT CONNECTOR, 45o, LOT OF 13

UNIVERSAL LIGHTING TECHNOLOGIES METAL HALIDE BALLAST M70MLTLC3M-500K

RASCP 3/4 SIDEWALL SPRINKLER G.64 LOTOF4

PRINTRONIX REV. E HAMMER BANK COVER ASSEMBLY KIT, 105034-002 *NEW*

NTN DOUBLE ROW BALL BEARINGS, 5305, NNB LOT OF 2

TECUMSEH AE230BT-401, HERMETIC COMPRESSOR, R 22, 115 V, 50/60 HZ, LRA 31

PIPE TAP 6 FLUTE 3 1/4 x 8"

DELPHI OXYGEN SENSOR ES10745 NIB

KLEIN TOOLS 5166, 7 POCKET TOOL POUCH, BELT WIDTH 2 1/4"

BALLUFF LIMIT SWITCH BNS 819-100-D-11 NNB

FANUC SERIES 16,18,160,180-MODEL B PARAMETER MANUAL GFZ-62450E/02

IFM EFECTOR PROXIMITY SENSOR SF3305 SFN12ADB/US-100 LOT OF 2 NIB

RELIANCE ELECTRIC 0-100 FPM ELECTRIC SPEED INDICATOR 63282

SKF SPHERICAL ROLLER BEARING 230/670 CAK /C083W507, NEW

UNICO 700-197 ENCODER

SYRACUSE STAMPING CO. 2"NPT 6000W CAST IRON FAUCET SSC

MILWAUKEE 3/8IN .NPT 125S.W.G SHUT OFF VALVES FIG.148 *NEW LOT OF 3*

BUSS FUSES ASSORTED - AGC-1 (5) AND AGC-2 (5) NIB LOT OF 10

GE 7000HRS 16.0MM MINIATURE LIGHT BULB 388 *NEW LOT OF 9*

LINCOLN ELECTRIC 56C 1750RPM EMC-TE THREE PHASE MOTOR G-2J7627C2

ALLEN BRADLEY SNUBBER ASSEMBLY S40410 SER. A *NEW*

HIRSCHMANN RHEINMETALL ELECTRONIX ETHERNET MODULE  RH1-TP

MAC 1348 150psi PNEUMATIC VALVE MV-P2A-AADB-DM-DDAP-2DM

1" BALL VALVE PN40

ALLEN BRADLEY MINI-PLC-2/17 1772-LW SERIES C PROCESSOR

HYDAC TECHNOLOGY CORP. 5" OAL FILTER ELEMENT 02060920 *NEW*

LPR CYLINDICATOR SENSOR, 3000 PSI

RELIANCE ELECTRIC 0-600 F.P.M ELECTRIC SPEED INDICATOR 63282

MICHIGAN DRILL 1/8" x 2- 1/2" TWIST DRILL BIT #650F *NEW* LOT OF 12

BOSCH SENSOR 025800201 LS 4

ALLEN BRADLEY 800T-N122A, PILOT LIGHT CAP, AMBER, LOT OF 5, NIB

HEVI-DUTY .275 KVA 50/60Hz TYPE E3PB CONTROL TRANSFORMER E2753PB

WIDELL 1 15/16-12 THREADED DIE 6 THREADS 505824

MINCO TT110PE1AC, SENSOR WITH JUNCTION BOX, 35 VDC, 122°F, NNB

JIC TUBE REDUCER/ENLARGER - 1 1/2" FEMALE X 1" MALE , LOT OF 3

WILKERSON REGULATOR R20-02-N00 *NEW*

BURKERT 120V 60HZ 10W 174PSI 1/4"NPT 2-WAY SOLENOID VALVE 0256 A 5/32 FKM BR NNB

TURCK PROXIMITY SENSOR Ni3 5-Q5 5-AN6X NIB

WATTS FLUIDAIR  1/4"NPT  END INSERT KIT, IK2OY *NEW*

TURCK 099-11649 CABLE CURO FAST NIB

ELLIOTT COMPANY 634159 54 CARBON RING, NIB

AMPHENOL-TUCHEL D64-E24A 46-PIN CONNECTOR, H46EEG16-FR-W06, NNB

WEBER WN16453 Bi10R-W30-DAP6X-H1141 NNB

GRACO 101917 REPAIR KIT, NEW IN BAG

BUSS BM6033B FUSE HOLDERS LOT OF 4

VICKERS ELEMENT KIT 941056 MODEL HS3

TOKUDA IONIZATION VACUUM GAUGE HFT-7

WATTS * BACKFLOW PREVENTER 3/8 N 9 NIB * 0061886

SKF BEARING 7205 BEY *NEW*

BROWNING TIMING BELT PULLY 40LH050

FALK 36RPM 31.74:1 RATIO 15HP GEAR REDUCER 152-7EZ3-06A1

PARKER 0107-8-6 SWIVEL ADAPTER 80EH, LOT OF 17

BURNS 3/4IN. NPT THERMOCOUPLE CONNECTION WITH ROD EWSP1A1-36-3A

TURCK VB2-FSM 4.4/2RKC 4T-0.3/0.3/S90/SV CORDSET, NNB

COILHOSE * 1/2  ID 25 PNEUMATIC COILED AIR HOSE NIB * GN12-25A

FURON 13-3/8" I.D. 16-5/8" O.D. 304 VC GASKETS, 12" 300 API-601 *LOT OF 2*

SQUARE D * INDUSTRIAL CONTROL TRANSFORMER  * 9070TF350D1

PARKER 1/2" MALE NPT X 3/4" FEMALE ADAPTER, LOT OF 9

GE 380-400/480 VAC COIL CONTRACTOR CL06A300M NIB

CKD CYLINDER RCC2-006370L-FL253387

SPEARS 1/2", 90?o, CPVC, ELBOW FITTING 806-005C *LOT OF 6, NEW*

WATTS * PNEUMATIC REGULATOR * R119-06C M2

SCHNEIDER ELECTRIC YELLOW LED SIGNAL LIGHT XVB C2B8

PTD 189 TAPER SHANK DRILL BIT, 26.0 MM DIAMETER, 11 1/8" OVERALL LENGTH, HS

MINEBEA MAGNETIC BRAKE SB-45B-104 24V SHAFT DIA. 6.0MM

INGERSOLL RAND 3RLM ?" DRIVE ANGLE PNEUMATIC NUT RUNNER

VICKERS * HYDRAULIC SOLENOID VALVE 24VDC * SV1104024DG

MOELLER MANUFACTURING CO. * MANUAL MOTOR STARTER * ZM-16-PKZ2

WHITNEY RENOLD 20B BRITISH STD CONN LINK NIB, LOT OF 5

SMC CYLINDER CDQ2A63-35D

LEVITON 3-POLE, 3-WIRE, 125-250V, 30A, LOCKING CONNECTOR 2663 *NEW*

PARKER 5/8" NPT MALE FACE SEAL 90 ELBOW X 1-1/2" NPT F/M ORB, LOT OF 6

DELPHI OXYGEN SENSOR ES10381 NIB

IFM EFECTOR L33600 CONNECTOR, NNB

METRIX * HN106 * PX 236

BANNER FIBER OPTIC SENSOR HEAD OSEFX

SQUARE-D * TIMING RELAY W/ RELAY SOCKET NIB * JCK1F600 / NR51

PARKER PNEUMATIC FILTER 07E21A13AC

SURVIVOR LAMP MODULE REPLACEMENT 90030 *NEW*

BINKS GUAGE-200# 83-387 / 0-200LBS/IN NIB

FANUC SERIES 0-MC, 00-MC, 0-MATE MC OPERATORS MANUAL GFZ-61404E/05

YOKOGAWA * DIGITAL AC AMMETER  * 2353 00

UFM FLOW MONITOR TYPE 12-13 01GM-2-600S-A3NR

PARKER 62P-3 LOW PRESSURE FITTING UNION 3/16 TUBE X 3/16 TUBE, BOX OF 20, NIB

RIDGID 1" NPT 6-FLUTE HAND TAP NIB 1-11 1/2 / 1 9/64

PARKER 1/8"ADAPTER FITTING 3-1 FBZ-SS *NEW* BOX OF 9

NUMATICS PNEUMATIC SOLENOID VALVE 1-10BAR  * L23BB452B000061

SQUARE-D * 60A 240VAC 250VDC SAFETY SWITCH SER.D2 * H-222 N

ABB CONTACTOR  BC25-40-22

UFM TYPE 2 FLOW METER 5M-NSF6GM-6-32V1.0-M3WR-PC4M-C-Z86

DEVILBISS SPRAY NOZZLES, AV-601-FF *NEW LOT OF 10*

DANAHER MOTION LINEAR MOTION 704555 NIB

FESTO PNEUMATIC CYLINDER DN-50-160-PPV, 174 PSI

HYSTER REPLACEMENT GASKET 1330772

COLONIAL * 1" SCH80 90 ELBOW FITTING NNB 1 LOT OF 19 * -

EIMCO GEARBOX MIXER 111663 A&B

CUTLER HAMMER  * BUTTON ENCLOSURE * 10250T N1

PUMP FOR BECKMAN 110 SOLVENT DELIVERY MODULE

CROUSE-HINDS WKH8 SINGLE PROFECTOR NIB

DELPHI OXYGEN SENSOR ES10385 NIB

MOTORCRAFT SPARK PLUGS BF82C *NEW LOT OF 6*

I-T-E EH3-S0203 POLE CIRCUIT BREAKER 480 VAC