福建中立恒自动化设备有限公司
一、摘要 PLC是一种专门在工业环境下应用而设计的数字运算操作的电子装置。
它采用可以编制程序的存储器，用来在其内部存储执行逻辑运算、顺序运算、计时、计数和算术运算等操作的指令，并能通过数字式或模拟式的输入和输出，控制各种类型的机械或生产过程。PLC及其有关的外围设备都应按照易于与工业控制系统形成一个整体，易于扩展其功能的原则而设计。在工业生产的各个领域，机械加工企业为了提高生产效率，采用机械化流水作业的方式，对不同类型的零件分别组成的自动生产线。随着产品机型的更新换代，生产线承担的加工对象也随之改变，这就需要改变控制程序，使生产线的机械设备按新的工艺过程运行，而继电接触器控制器系统是采用固定接线，很难适应这个要求。大型自动生产线的控制系统使用的继电器数量很多，随着PLC的应用日益普及,其使用方法简单,便于掌握,且可靠性,抗干扰性很强,自身具有完善的功能.模块化的结构,使其在工业生产线上的应用越来越广泛。
发展趋势：1.向高速度、大容量方向发展
为了提高PLC的处理能力，要求PLC具有的响应速度和更大的存储容量。目前，有的PLC的扫描速度可达0.1ms/k步左右。PLC的扫描速度已成为很重要的一个性能指标。
在存储容量方面，有的PLC可达几十兆字节。为了扩大存储容量，有的公司已使用了磁泡存储器或硬盘。
2.向超大型、超小型两个方向发展
当前中小型PLC比较多，为了适应市场的多种需要，今后PLC要向多品种方向发展，特别是向超大型和超小型两个方向发展。现已有I/O点数达14336点的超大型PLC，其使用32位微处理器，多CPU并行工作和大容量存储器，功能强。
SQUARE D 30A NON-F SAFETY SWITCH 240V TYPE 1 INDOOR 7.5 HP 3 PHASE DU321
GENUINE PACKAGE HP LASERJET Q6511X CARTRIDGE HP 11X 2410 2420 2430
GENUINE PACKAGE HP LASERJET Q6511X CARTRIDGE HP 11X 2410 2420 2430
TIMKEN GVFTD1 3/16 2-BOLT FLANGE BEARING 1 3/16" BORE
MARTIN 3020 TAPER LOCK BUSHING 1-1/4" BORE 3020 1-1/4
ADTRAN 54 VDC 2 AMP OUTPUT DC POWER SUPPLY 120 VAC 2 AMP INPUT 1175043l3
KENSINGTON LIGHTING GENERAL PURPOSE STRIP T8 FIXTURE 120V SL117120/277-2
CROUSE HINDS V-200 CLEAR GLASS GLOBE FOR V VH SERIES FIXTURES 4" X 9"
POWER-INTERNATIONAL SERIES HD24-4.8-A POWER SUPPLY 24VDC
BREWER 16 TOOTH TIMING BELT IDLER SPROCKET 25mm BORE 73mm FACE 16H1-F
RBC FLAT CAM FOLLOWER HEX HEAD S56LW
FISHER 912N-523/B1 PRESSURE REGULATOR 250 PSI
DM SOILITE AA1310-03B SLEEVE BUSHING 1.003" x 1.377" x 2"
ALLEN BRADLEY CASSETTE RECODER CABLE 1772TH
ITE 10 A PNEUMATIC TIMING IT 600 VAC 115 VDC J20T1
DM SBAY STATE 8" x 3/4" x 1-1/4" GRINDING WHEEL 3105 RPM 9A-60-J12-V52
MARTIN 60BS20 1 1/4'' SPROCKET 60 PITCH 20 TEETH
GENERAL ELECTRIC COIL 55-501336G002 115V 60HZ SIZE 3 STARTERS CONTACTORS
LOCHINVAR 100157651 FOR CREST MODELS, ALARM BELL
1DM SBELLEVILLE DISC SPRING WASHER SPEC B2000097S LOT OF 14
DM SGE THP100 PADLOCKING HANDLE LOCK LOT OF 8
MCQUAY ENERGYLINE SYSTEMS 667948B-02 INTERFACE BOARD 000406-02 REV C
ROSS CONTROLS 377K77 VALVE REPAIR KIT TYPE 00267
FLOWSERVE PERAMIC CERAMIC SEAL K73R1375333
DM S SYLVANIA 500T3Q/S/CL/RP 500W T3 130V HALOGEN BULB RSC BASE 58997-2 LOT
DM SCISCO GLG-SX-MMD TRANSCEIVER EXT 10-2626-01 CLASS 1 21CFR1040.10 A V01
DM SHARRIS FLASHGUARD FLASHBACK ARRESTORS CHECK VALVE 88-FBRL 88-FBRR
DM S FINISAR FTLF8528P2BNV-EM 850 nm CLASS 1 21CFR1040.10 LOT OF 10
REOTEMP INDUSTRIAL BIMETAL DIAL THERMOMETER LL0251F67
REOTEMP INDUSTRIAL BIMETAL DIAL THERMOMETER LL0401F67
DM SBIMBA D-231-1 CLEVIS PISTON ROD MOT
DM SDM SBIMBA D-231-1 CLEVIS PISTON ROD MOT
SCHNEIDER MAGNECRAFT 841CS8-I CURRENT SENSING RELAY 8 AMP
TELEMECANIQUE XVBC4M6 BLUE FLASHING IT
REXNORD 62 DBZ CENTER MEMBER ASEMBLY TOMALOY DISCS 14415T
DAYTON 1UHG4 LINE VOLTAGE THERMOSTAT 120VAC TEMPERATURE RANGE 32-99º
GENUINE KOMATSU 134-06-61611 LAMP ASSEMBLY GREEN L.E.D. 1-2-3 INDICATOR LIGHT
SMC 1/8" NPT AR REGULATOR SET PRESS 7-125 PSI BODY SIZE 20 AR20-N01E-Z-B
VIDEOJET SP356047 MANIF SUB ASSEMBLY
PILZ PNOZ ML1P SAFETY RELAY MODULE 24 VDC 773540
TIMKEN YA010RRB
DM SSWAGELOK SS-1213-1, SS-1214-1, SS-1212-1 3/4" FERRULE SETS OF 5
BENTLY NEVADA ABB STAL 266024-3 PROXIMITY PROBE
SQUARE D 9998DA1V02 REPLACEMENT MAGNET COIL 120 VAC
DM S SQUARE D 9998DA1V02 REPLACEMENT MAGNET COIL 120 VAC
HYDE PARK SM850A-12-00 ULTRASONIC SENSOR TRANSMITTER 12-24VDC 4 PIN
INTEL PRO/1000 MT DUAL PORT SERVER NETWORK ADAPTER PWLA8492MTBLK5
4DM SAPPLETON VPT-2 100-300W GASKET 48 PIECES
PAIR OF STOKES CLUTCH SHIFTER SHOES 248-565-001
SALISBURY SIZE 9 LOW VOLTAGE LINEMAN GLOVES E0011B/9
NK TECHNOLOGIES AT1-420-24L-SP AC CURRENT TRANSDUCER
SANDVIK 3-5/8" CARBIDE TIPPED CT HOLE CUTTER SAW 3832-92 / 55850
BROOKS 1350GAK3DBJF1AAA SHO-RATE RANGE 65 TO 310 TUBE FLOW METER
PIAB 31.50.035P SUCTION CUP
HYDAC HIGH PRESSURE FILTER ELEMENT CP-C16W141UM
SIGHTGLASS JOHN C ERNST ELECTRONIC DIGITAL CALIBRATION DISPLAY
TIP TEMPERATURE TIPTCK044 Type "K" 3/16 DIA. 6" LENGHT PENETRATION TIP
ALLEN BRADLEY SELECTOR SWITCH KIT SIZES 00-2 1483N1
ALLEN BRADLEY 800H-JR4 SELECTOR SWITCH 3 POS. SPRING LEFT MAINT. CENT RIGHT
DM S ALLEN BRADLEY 800H-JR4 SELECTOR SWITCH 3 POS. SPRING LEFT MAINT. CENT RIGHT
AUTOMATION DIRECT TERMINATOR OUTPUT MODULE W/ BASE T1K-16TA
DM S OMRON 24 VDC RELAY 14 BLADE RELAY MY4 5 AMP 250 VAC 30 VDC LOT OF 6
DM S MORSE NO.50 2 PITCHSET LINK 323540 LOT OF 10
SUPCO 120 VAC FURNACE IGNITER SPLT3400
CUTLER HAMMER / EATON 115 VAC INPUT MODULE D200MID1615A -
RULAND NOMAR STEEL 2-PIECE SHAFT COLLAR W/ KEYWAY 2-1/4" BORE SPK-36-F
MRC DOUBLE RADIAL/DEEP GROOVE BALL BEARING BORE, 30 mm 306SZZG
CONTROL TECHNOLOGY MODEL 2203 16 PT IN / 16 PT OUT MODULE 50-1503 REV C
DM SWILDEN 04-3700-01-700 ALUMINUM INNER PISTION
HUBBELL LIGHHAWK PIR 1-CIRCUIT WALL SWITCH W/ INTELLIDAPT LHIRS1-G-IV
DM SBETE FULL CSPIRAL SPRAY NOZZLE TF8N 1/4" NPT BRASS LOT OF 7
REDINGTON ELECTROMECHANICAL HOUR METER 115 VAC 711-0130
HAWKEYE 904 HAWKEYE VERIS SPLIT-CORE SELF-CALIBRATING CURRENT SENSOR 135A
JOHNSON CONTROLS HUMIDITY TRANSMITTER W/ TEMPERATURE SENSOR HE-6300-3
DM S TIMKIN SMALL BORE INDUSTRIAL SEAL 472826
DM S LOCKS C1975-KD BOLT LOCKS DISC TUMBLER LOT OF 6
AXIOM WS-G5486-AX 1000 BASE-LX/LH LONG HAUL GBIC TRANSCEIVER
AXIOM WS-G5484-AX 1000 BASE-SX SHORT WAVELENGTH GBIC TRANSCEIVER
GENUINE EPSON T6054 YELLOW K3 INK CARTRIDGE STYLUS PRO 4880/4800 110ml
DM S GENUINE EPSON T6054 YELLOW K3 INK CARTRIDGE STYLUS PRO 4880/4800 110ml
GENUINE EPSON T6057 LIGHT BLK K3 INK CARTRIDGE STYLUS PRO 4880/4800 110ml
PHOENIX CONTACT MCR-VAC-UI-O-DC VOLTAGE CONVERTER TRANSFORMER 2811103
RELIANCE ELECTRIC REMOTE OPERATOR ADAPTER KIT 14C220
SEALMASTER G 1" BALL INSERT BEARING ER-16TC
MARSH IJDTL 13793 CABLE ASSEMBLY ENCODER 10'
AMETEK NT2-24DF PANALARM ELECTRONIC ALARM 057-0012-5-03 REV. 7 24 VDC
GENERAL ELECTRIC GE IC694CEE001-AA PAC SYSTEMS RX3i CEP EXPANSION
ORTMAN SERIES 101 HYDRAULIC CYLINDER REBUILD KIT TS3315120K0
ALLEN BRADLEY 1606-XLSDNET4 100-240VAC INPUT 24VDC OUTPUT 0.9-0.35 AMPS
ASCO DUST COLLECTOR BLOWDOWN VALVE 3/4" PIPE 8353C3 5-125 PSI
NORGREN V61R411A-A213JB 3 WAY SOLENOID VALVE 24 VDC COIL 1/4" PORTS
CREE SMK-LE-EC SURFACE MOT KIT END CAPS USES WITH CR SERIES SURFACE KIT
FUJI ELECTRIC COIL DC 24V 20 A SC-E-2/G
DM SBARNES JONES 1966 STEAM TRAP INTERIOR 3/4" FITS TRANE B3
DM SNORA LIGHTING NT-312 I CONNECTOR 120 VAC 20 AMP
OMEGA ENGENEERING PROCESS PANEL METER DP24-E
1DM STCP LG16C24VAMB 24V LED BULB G16 CAN 24V FESTIVE LT AMB OF 12
CROUSE HINDS DEV12G HAZARDOUS LOATION PUSHBUTTON GREEN
DM S HOLO-KROME 2-PIECE STEEL CLAMP-TITE COLLAR 3/4" ID 2-1/2" OD 15122
DM SRICH-400 DIE 472 400 0ATC16 SILVER, RED CAPS
OMEGA DP450-HACC HIGH AC CURRENT METER 115 VAC RANGE 50.0-200 AMPS
SPEEDAIRE 3/4" MIST AIR LINE LUBRICATOR 250 PSIG MAX 175ºF 4ZL88
DM SOSECO RUPTURE DISK SIZE 1" TYPE CO 316 TEF BURST PRESSURE 206.2 PSIG@ 72F
ASCO SOL-B SOLENOID VALVE
WIKA 0-3000 PSI LIQUID PRESSURE GAUGE 2-1/2" FACE 1/4" NPT 9831988 / 233.54
3D INSTRUMENTS 0-500 PSI PRECISION DIRECT-DRIVE GAUGE 4-1/2" 25544-27B54
DODGE GRID-LIGN COUPLING 4DG-H
SIEMENS SIRUS 36-45 AMP MANUAL MOTOR STARTER PROTECTOR COMBO 3RV1031-4GA10
2" STAINLESS 316L WELD-ON PIPE ION A/SA182F316/F316L T 950 3M SP-832
SQUARE D 60 AMP CIRCUIT BREAKER 240 VAC 2 POLE FAL22060
PRECISION BRAND 6" x 100" STEEL SHIM .031 GAUGE 16660
ALLEN BRADLEY 1 HP VARIABLE SPEED DRIVE 240 VAC SERIES C FRN 7.06 160-AA04NSF1
CUTLER HAMMER SIZE 5 REPLACEMENT COIL 110/120 VAC MODEL 1891-1
ALLIS CHALMERS MOTOR STARTER COIL SIZE 3 4 AC MFG 25-105-232-501 115 VAC COIL
PANASONIC CF-VZS211W SECOND BATTERY PACK
ARROW PNEUMATICS 1/4" AUTOMATIC DRAIN FILTER SEPARATOR F352F5 9004
PROTO PROFESSIONALS 1-3/4" DEEP IMPACT SOCKET 07528L
(DM SREED 8" HEAVY DUTY STRAIGHT HANDLE PIPE WRENCH 02120 RW8
ITT 3/4" CAST IRON Y-STRAINER 300 SWP 600 WOG
BALDWIN PA1934 FILTER
CROUSE HINDS V200 CLEAR VAPORTIGHT GLOBE FOR V VH SERIES FIXTURES
(DM SPENTAIR COSTGUARD CG5-10 WATER FILTER CARTRIDGE 5 MICRON 6,000 GALLON
DM SMASTER LOCK SPECIAL USE PADLOCK WITH 1 KEY 7LJ INDIVIDUALLY KEYED /5
DIESEL LIVING W/ SELETTI MACHINE COLLECTION LRG WHITE PORCELAIN CONTAINER
MARTIN SHEAVE 2 B 34 SH 3-1/2" OD B-BELT
DM S FIBRE-METAL HEAT TREATED WIDE VISION GLASS FILTER PLATE A-P451H-10
CHESTERTON 1.500 MECHANICAL SEAL 770-12
DM SMORSE NO. 60 2 PITCHSET LINK 324093 LOT OF 8
MCDANIEL 600 PSI GAUGE 1/2" NPT 316SS TUBE SOCKET 4" FACE AB 60208
OEM VACUUM PUMP 25136 - FACTORY
THERMOWELD CC-2 EXOTHERMIC M 500 MCM R 500 MCM TAP CART 2X150 M-280 Z927
FAFNIR 214KD SINGLE ROW BEARING