140DAO85300 库存有货

分类: 标签:
选择深圳长欣,选择放心,售后无忧
大量现货,当天顺丰发货!
了解产品更多详细信息或购买请拨打以下电话咨询:
白工微信
(加微信咨询)

联系人:白工

电话:18150087953 / 18005022138

Whatsapp/Wechat:+8618150087953 / +8618005022138

Email:sales@cxplcmro.com

描述

140DAO85300

为了延长PLC控制系统的寿命,在系统设计和生产使用中要对该系统的设备消耗、元器件设备故障发生点有较明白的估计,也就是说,要知道整个系统哪些部件最容易出故障,以便采取措施。本文将对PLC过程控制系统故障分布规律进行分析。
    为了延长PLC控制系统的寿命,在系统设计和生产使用中要对该系统的设备消耗、元器件设备故障发生点有较明白的估计,也就是说,要知道整个系统哪些部件最容易出故障,以便采取措施。现以我厂特种水泥1号线的PLC过程控制系统为例,对PLC过程控制系统故障分布规律进行分析,希望能对PLC过程控制系统的系统设计和U常维护有所帮助。
    系统故障一般指整个生产控制系统失效的总和,它又可分为PLC故障和现场生产控制设备故障两部分。PLC系统包括中央处理器、主机箱、扩展机箱、I/O模块及相关的网络和外部设备。现场生产控制设备包括I/O端口和现场控制检测设备,如继电器、接触器、阀门、电动机等。
    我厂特种水泥1号线过程控制系统简介
    2000年该系统改造时采用日本二菱公司的A2系列PIC为核心组成的PLC过程控制系统。系统配置如图1。
    该系统有2个集中控制室:窑尾控制室和窑头控制室,其中窑头控制室为主站;2个现场工作站:窑尾生料自动配料工作站和窑尾成球盘自动加水成球工作站;2个电视监控系统:预热器进口下料监控和窑头电视看火。现场工作站是独立的微机自动控制系统,它与主站只进行模拟量的通讯和开关量的联锁。主站与从站间采用帧同步全双工通讯方式:
    该系统运行近3年来PLC故障统计
    现场控制设备故障统计
    经统计,系统故障共计126次,其中PLC的故障比例约为4.7%,现场部分故障比例约为95.3%,:对照其他PLC过程控制系统的故障数据,并考虑该系统运行时间不是很长,该比例比较接近一般PLC过程控制系统的故障分布规律,有一定的普遍性。一般来讲PIC部分的故障比例约为5%,现场控制设备的故障比例约为95%。
    PLC过程控制系统故障分布的估
    PLC主机系统最容易发生故障的地方一般在电源系统和通讯网络系统,电源在连续工作、散热中,电压和电流的波动冲击是不可避免的。通讯及网络受外部干扰的可能性大,外部环境是造成通讯外部设备故障的最大因素之一。系统总线的损坏主要由于现在PLC多为插件结构,长期使用插拔模块会造成局部印刷板或底板、接插件接口等处的总线损坏,在空气温度变化、湿度变化的影响下,总线的塑料老化、印刷线路的老化、接触点的氧化等都是系统总线损耗的原因。所以在系统设计和处理系统故障的时候要考虑到空气、尘埃、紫外线等因素对设备的破坏。目前PLC的主存储器大多采用可擦写ROM,其使用寿命除了主要与制作工艺相关外,还和底板的供电、CPU模块工艺水平有关。而PLC的中央处理器目前都采用高性能的处理芯片,故障率已经大大下降。对于PLC主机系统的故障的预防及处理主要是提高集中控制室的管理水平,加装降温措施,定期除尘,使PLC的外部环境符合其安装运行要求;同时在系统维修时,严格按照操作规程进行操作,谨防人为的对主机系统造成损害。
    PLC最大的薄弱环节在I/O端口。PLC的技术优势在于其I/O端口,在主机系统的技术水平相差无几的情况下,I/O模块是体现PLC性能的关键部件,因此它也是PLC损坏中的突出环节。要减少I/O模块的故障就要减少外部各种干扰对其影响,首先要按照其使用的要求进行使用,不可随意减少其外部保护设备,其次分析主要的干扰因素,对主要干扰源要进行隔离或处理。
    在整个过程控制系统中最容易发生故障地点在现场,表2列出了现场中最容易出故障的几个方面。
    第一类故障点(也是故障最多的地点)在继电器、接触器。如该生产线PLC控制系统的日常维护中,电气备件消耗量最大的为各类继电器或空气开关。主要原因除产品本身外,就是现场环境比较恶劣,接触器触点易打火或氧化,然后发热变形直至不能使用。在该生产线上所有现场的控制箱都是选用密闭性较好的盘柜,其内部元器件较其他采用敞开式盘柜内元器件的使用寿命明显要长。所以减少此类故障应尽量选用高性能继电器,改善元器件使用环境,减少更换的频率,以减少其对系统运行的影响。
    第二类故障多发点在阀门或闸板这一类的设备上,因为这类设备的关键执行部位,相对的位移一般较大,或者要经过电气转换等几步骤才能完成阀门或闸板的位置转换,或者利用电动执行机构推拉阀门或闸板的位置转换,机械、电气、液压等各环节稍有不到位就会产生误差或故障。长期使用缺乏维护,机械、电气失灵是故障产生的主要原因,因此在系统运行时要加强对此类设备的巡检,发现问题及时处理。我厂对此类设备建立了严格的点检制度,经常检查阀门是否变形,执行机构是否灵活可用,控制器是否有效等,很好地保证了整个控制系统的有效性。

Amray 3800L Scanning Electron Microscope SEM 904

Brand New Feeler 3.5 tons DIESEL FORKLIFT TRUCK

Brand New Clark 2010 C25D 2.5 Tons Diesel Forklift

Fusion UV Light Hammer great condition

VARIAN TURBO-V 70 With Varian controller

HP 4192A 5Hz-13MHz LF IMPEDANCE ANALYZER

ERICSSON FSU 925 RTC Fusion Splicer V-groove

TURBO VACUUM VALVE IDX + Yokogawa 2.5+ ORIX FAN + Omron

HP 5361B PULSE / CW MICROWAVE COUNTER 20GHz

CYMER Module 144849 High Voltage Power Supply

Juniper PB-1GE-SFP-QPP Ethernet 1000BASE-X SFP Module

RFL 5800 Three Phase Watthour Meter Calibration System

WAVETEK 4032 STABILOCK UNIVERSAL ANALOG / DIGITAL COMMU

Sun Netra 240 Server 2×2.4Ghz/4GB Mint Condition

Agilent 8508A Vector Voltmeter w/ Agilent 85082A

Tektronix TDS754D 500MHz Oscilloscope TDS 754D
Excellent condition, read description!

Hp Indigo Ink Mixing System Compressor 477 Vibration

LeCroy WAVERUNNER LT342 500MHz 500MS/s DSO 200VA MAX

WELCH ALLYN VIDEO PROBE 2000 / VIDEO PROCESSOR V1678PAL

MICOM-2ES MOTOROLA MOBAT HF TRANSCEIVER MICOM 2EF

MICOM-2EF MOTOROLA MOBAT HF TRANSCEIVER MICOM 2EF

HP HEWLETT PACKARD 54520C OSCILLOSCOPE COLOR 500MHz

PFEIFFER Turbo Pump TMH 262 P with TC100 Controller

VARIAN TURBO-V 300HT Macro Torr TV 300HT PUMP 933Hz

4 UNITS INVENSYS POWERWARE R4048-00

HP HEWLETT PACKARD 53181A 3GHz FREQUENCY COUNTER

Damon/IEC Div. CU-5000 Centrifuge New, never been used

MOOG MOD 225A-159 -8.00 TO 8.00mA HYDRAULIC SERVO VALVE

Castle 2410MB AC/DC Field Operating OR Light

Quickset Hercules 4- 63020 -8 Tripod Ultra-Stable

Olympus semiconductor equipment microscope U-PMTVC

DRAKE R8B HF Communication Receiver

SHIMADZU TURBO MOLECULAR PUMP Model TMP 280

HP TFT7600 Rackmount Keyboard and Monitor AG052A

Rohde & Schwarz DAB MULTIPLEXER Model DM 001 T

ENI 510L RF Power Amplifier 1.7 to 500MHz 9.5W

SNELL & WILCOX IQ MODULAR video ad Model IQ 3URC

VICTOR HASSELBLAD 500C/M Camera System + LENS 80mm

AE ADVANCED ENERGY Model MDX – 10K SLAVE

Hipotronics HD 100 Series Hipot Tester (110v)

AE Advanced Energy MDX-L6 Magnetron

DYNALOAD Model DLVP 50-300-3000 TRANSISTOR DEVICES INC

SAES GETTERS Mod. PS4MT15R2M GAS:R 15.0L/m Gas Purifier

Shimadzu Turbo Molecular Pump TMP-280 Working!!

FUSION UV I6B FOR INDUSTRIAL

EDWARDS VACUUM COMPONENTS ROTARY DIFFUSION PUMP + SPEED

Cisco Systems Ethernet Interface Processor 73-0906-04

FUSION UV I300MB SYSTEMS INDUSTRIAL

ALPHA TP 025S-MF2-91 + YASKAWA SERVO MOTOR SGMAH-08AAF

Millipore: MDVX-018S01 Valve Flow + VEXTA PH265 2-Phase

HUGHES ELECTRON DYN TRAVELING WAVE TUBE 8100H MFR-73293

RACAL INSTRUMENTS 1260-45B High Density Switch Matrix

MOTOROLA Communication Service Monitor 2200B/HS

Siemens IOPAC (SRA controller card) SRA L

SIEMENS SIMATIC PANEL Operator

TELRAD TENECS Gemini Series Diana 76-FXO-0004/0 4 Port

17 Vol Victor Hugo 1900 Oeuvres vintage rare books

SHIMADZU TURBO MOLECULAR PUMP Model TMP

HP 33120A 15 MHz Function/Arbitr​ary Waveform Generator

2 INTEL XEON E5450 3GHz/12M/1333 SLANQ Quad Core CPU’s

YOKOGAWA VB8000 ARBITRARY WAVEFORM GENERATOR 100MHz

YASKAWA AC SERVO MOTOR SGMAH-08AAF41 + ZF PGE50/2 GMBH

JRC 2J55 MAGNETRON TUBE

WWG DTS 400 DIGITAL BROADCAST MONITOR

Lot of 100 INTEL SL6PF, SL6RZ, SL6GQ, CPUs + MORE….

LEESON Electric Motor Hydraulic Pump 2SF20E Micro Cool

General Microwave F9120 1-18GHZ RF Switch

HP 8405A VECTOR VOLTMETER + PROBE CONNECTOR

National Instruments VXI-MXI-2

TRANS-WEIGH Mod 6260 CRANE SCALE Capacity 20.000 Kg

SCIENTIFIC COLUMBUS 6444-12 TRANSDUCER CALIBRATOR

HP Step Attenuators 8494B and 8495d Set

Vintage Philco Sierra 301B L.F Wave Analyzer

YASKAWA SERVO MOTOR SGMAH-08AAF41 + ZF Maschlnenantrlb​e

Agilent HP 33220A Function Arbitrary Waveform Generator
powers up for parts or repair

HP/Agilent E4418B Power Meter
not powers up for parts or repair

KLÖCKNER MOELLER NZM9-250 CIRCUIT BREAKER NZM9 250

GENERAL MICROWAVE AUTOMATIC PEAK POWER METER 478A

Merlin Gerin Masterpact M20 NI 1000V 50/60HZ IEC947-2

Audiocodes IPM260A/120/NoS​pan/SCbus/MVIP

HUMPHREY Vacuum Gate Valve 120VOLTS / PRESSURE 125 PSI

HP 3326A Two Channel Synthesizer

MICRO PCM MMP-600-149 PN 17000149-501 AYDIN VECTOR

LOTS OF 30 XILINX XC2018-70 PG84BAFQI 04XC 7D9807A

DYNATECH NEVADA DS 6100 PATIENT SIMULATOR DataSim Compl

LECROY 9310 DUAL 300MHz OSCILLOSCOPE 100MS/S

CASE HARDIGG Waterproof Resistant to impact damage

HASSELBLAD Lenses & Accesories 500C/M – 4 UNITS

LOT OF 15 Notebook / Laptop HP , COMPAQ , IBM , NEC

BALDOR MicroFlex 6A AC SERVO DRIVE FMH2A06TR-EN23 MINT

ODIN MEDICAL TECHNOLOGIES AMPS CAT.NO 506A0059-01

PENTAX SMC 200MM ED LENS 1:2.8 Pentax-A

HP 3325A Synthesizer Function Generator opt:02

CUTLER HAMMER CIRCUIT BREAKER Model EHD 14K / Series C

6 UNITS OF SUPER VEXTA / 2 PHASE DRIVER Model UDX5114N

VAT Insertable Vacuum Chamber SERIE 693 Gate Valve MDC

COLLINS TEST HARNESS RADIO SET Type 678P-1

IBM Fibre Channel Tape Drive 3588 Model F3A

VERTEQ R/D CONTROLLER Mod. 1071233 -503

BALADOR Brushless Servo Motor BSM90C-3150AF + GUDEL AE

IBM HS20 Blade Server 8843 PSP Dual Xeon

2 Units I TOUCH MAXSERVER 4PORT TERMINAL MX-1604 MX1604

7 – Semtech – SC3BK6 Diode Rectifier Bridge Single

AceCo Precision 154mm Susceptor S33-418 / 6”

HP 8662A Synthesized 1280 MHz Signal Generator OPT. 001

ALLEN BRADLEY AB Ultra 3000 Servo Drive 2098-DSD-030

HP BOARD CA356 -00210 & CA256 -00340

Fluke Philips PM5518-TX Color TV Pattern Generator

VACUUBRAND Diaphragm Vacuum Pump MZ 2D / ABM 4EKF63CX-4

SCHLUMBERGER GP3050 Three-Phase Phantom Load Generator

YASKAWA XtraDrive Model XD-08-MS V2.91 200-230V 50/60Hz

BIO RAD MICROMEASUREMEN​T CARTS Model Y5605000

HP Storagetek PD088E 600 200 / 400GB LTO-2 / NEW

NTN BEARINGS 63317ZZC3

28 NEW SEALECTRO N TYPE MALE TO SMA FEMALE GOLD ADAPTER

HP 141T / 8555A / 8552B Spectrum Analyzer System IF/RF

HP 1671D Logic Analyzer 100 MHz State 125 MHz Timing

THERMAL-MAGNETI​C CIRCUIT BREAKER D 400A

HP Agilent 41421B Source / Monitor unit

FREEDOM Model10 HEART INTERFACE / XANTREX INVERTER AUTO

TINKER & RASOR MODEL A-P HOLIDAY DETECTOR

HP 8657A Signal Generator 0.1-1040MHz

VERTEQ Mod. MCS 2600 electronic / 120VAC 50-60HZ / 15A

BALADOR Brushless ServoMotor BSM90C-3150AF 7.8NM 1.66KW

Pulnix PUL TM-765E Monochrome camera

Nikon MF-1 250 Bulk Film Back

VYNCKIER HIGH PRESSURE PSI VJ & RVJ + MARATHON ELECTRIC

Lot of 134 ALTERA EPM5128JC-2 Logic Device

OMC P5074A/P6451B Gear/Shaft

RAD OPTIMUX XLE1 48 FC15L Ethernet Mux

5 WESTINGHOUSE ADJUS CIRCUIT BREAKER SERIES C HFW3063JL

LSI Logic MegaRAID SAS 8480E PCI-E RAID Controller

ABM VDE0530 Small Electric Motor + STANCOR GISD-1000

HP Hx2490c IPAQ Pocket PC/PDA With WiFi and Bluetooth
Brand new, never been used, no power supply, view pics

3 Units of Intel Xeon Processor 7140N SL9HD

MOTOROLA VME SBC Bus Board MVME 167-32B

GEC ALSTHOM SERVO MOTOR AIMANT RX120LR1000

PARKER Gemini Servo Drive GV RS-232 / 485 GV-U3/6/12

CASE SKB Waterproof 160Liter Resistant to impact damage

Baldor Vector Drive ZD18H201-E

SONY Video graphic printer UP-895CE

HIAC ROYCO 243A ROYCO Particle Analyzer

LOT OF 39 MOTOROLA MC68824RC12H PROCESSOR CHIPS

GN Nettest Model DST 2000 POWER-UP

ICOM IC-R71A HF Communication Receiver

PANASONIC AG-DV2000 DIGITAL VIDEO CASSETTE RECORDER

BIRD AT-800 ANTENNA TESTER 806-960 MHZ FREQ RANGE
see the description

2 MATROX GPG4N / 400 / 128 / 2 BOARD

ATCA NetStructure Single Board Computer ASmax SDR-A-1

MKS BARATRON 122B PRESSURE TRANSDUCER + MKS Type 128

3COM COREBUILDER 9000 20-PORTS 100BFX 3CB9LF20MM

2 ANDREW TYPE 160516-177 WAVEGUIDE Patented 3924205

400 UNITS CABLES ISOTEC SMA Male 5cm + 10cm CB Mixte

P. ANGENIEUX F. 10-150mm 1:2-2.8 ZOOM LENS Type 15×10 B

LOT OF 49 PENTIUM 4 CPU’s (See description)

MONARCH M-3519-0148 HYDRAULIC POWER UNIT / dyna jack

WAVETEK digelec UP803XB

STI MICROSAFE LIGHT CONTROLLER MC42E-1-AC1 + CABLE

HP 09510-60017 TEST ADAPTER 9510D A48

MKS SIGNAL CONDITIONER 270 + MKS TYPE 113B POWER SUPPLY

EA ELEKTRO AUTOMATIK GmbH EA-PSMPS 948-13R REM POWER SU

VARIAN 525 COLD CATHODE VACUUM GAUGE + MDC IB420

SINCLAIR TECHNOLOGIE Model FP 20207 / Freq 170 MHZ

Tektronix 2430A DIGITAL OSCILLOSCOPE 150MHz

LUCAS WESTERN AC MOTOR WITH BRAKE + LINEAR ACTUATOR

IBM 19P3978 ULTRIUM LTO-1 DRIVE MODULE

ENTWISTLE COMPAGNY CRANE SCALE Model LL-15

MET ONE POINT 3 Particle Counter 100K Grants 84083110

FUJINON A19x8.7B12U 1:1.8 / 8.7-165mm

Weinschel Engineering 438A + 433A + 432A + 434A + 4310A

HP / Agilent 3586A Selective Level Meter

2 UNITS OF CLIFTON PRECISION TANDEM SYNCHRO + RESOLVER

PACIFIC SCIENTIFIC R46SSNA SS-NS-NV-02 SERVO MOTOR

ALLIED TELESYN ROUTER AR745 Modular Enterprise Router

TEKTRONIX THS720A 100MHz SCOPE DIGITAL OSCILLOSCOPE
see the description

ASTRO MED DASH 10 CHART RECORDER

8 UNITS OF CABLE RAYCHEM CORPORATION M22759/32-18

IBM CPU /Speicherboard xSeries 445 SMP Board – 13M7910

Anritsu Model MD 6420A Data Transmission Analyzer

RAMIX PMC239/F CONTROLLER CARD + ICS-554E-4-MN

ALLIED TELESYN AR740 Modular Branch Office Router

2 x DIGITAL MICROWAVE Spectrum II 16XE1 IDU + FAN UNIT

Tektronix 1751A Waveform / vector Monitor NTSC TESTED.

TEKTRONIX 7613 OSCILLOSCOPE + 7B53A + 7A13 + 7A24

NEXCOM BOARD SET 40FD PEAK7220 / 4BP07220D1

COMMUNICATIONS PROCESSOR SIEMENS 6GK7343

SUN MICROSYSTEMS SunBlade 2000 SYSTEMS COMPLET

BRUEL & KJAER 1901 TRACKING FREQUENCY MULTIPLIER

2000 Units STMicroelectron​ics IC Chips: LM339DT / KA339

HYCAM 400` HIGH-SPEED 16MM CAMERA MOTION CAPTURE

Icom IC-R71A Communications Receiver for parts

RS POWER REFLECTION METER . NAP Model 392.4017.02

Varian Turbo-V 250 MacroTorr Turbomolecular Vacuum Pump

MINICOM SMART IP ACCESS 1SU51068/R

5 Units of Analog Devices – 5962-8969701XA Resistors

MKS BARATRON Model. 690A01TRC Vacuun transducer head

IBM System Board 42D3638 IBM Original Part X 3550

10 x 5= 50 Units Kodak Professional PORTRA 400VC FILM

MODICON QUANTUM 140CRA93100 Remote Drop S908 Version 4.

DAYTON JET PUMP MOTOR 115-230Volts // + TEEL 9P997A

CIT Alcatel 2012A Industrial Vaccuum Pump Oil

YAW GYRO PART ELEC. DWG. 29 A9

450 pieces of 2N2905A TRANSISTOR

HP Model 6130C DIGITAL VOLTAGE SOURCE / + – 50 VOLTS

ABB PROCESS ANALYTICS Mod IVS1500-1 INTELLIGENT VOLTAGE

APPLIED MATERIALS 0100-76048 SAC CONTACTOR CONTROL BD.

ABB Asea Brown Boveri – Wiring Accessories UNF – 50S

National Instruments SCXI-1000 SCXI-1121 SCXI-1160 Mint

JOHNSON CONTROLS Digital Controller DX-9100-8454

TEKTRONIX 2230 DIGITAL STORAGE OSCILLOSCOPE 100MHz

CISCO Route Switch Processor 8 CNP2J60BAA

TELEWAVE 44A RADIO RF WATT POWER SWR METER

POLARAD 1207A SIGNAL SOURCE 3.70-8.40GHz

BALDOR Industrial Three Phase Motor M3538 / 34A61 – 872

BAUSCH & LOMB Stereo Zoom 7 ZOOM RANGE 1.0X – 7.0X

LEYBOLD TURBOTRONIK NT 150/360 TURBO CONTROLLER

Omron Safety Light Curtain TYPE 4 F3SN-A0622P25-D

7 Texas Instruments – TMS320C40GFL50 & 1-TMS320C40GFL4​0

WAVETEK ROCKLAND 753A BRICKWALL FILTER

COLLINS RADIO CONTROL 714E-3

CISCO SYSTEMS WS-X4013 Supervisor II Engine

OMC Carburetor 389723 MX 25 B L

Carburetor WMA4-3

2 PHILIPS TUBES Type 28136 Emission 1400mA 6,5V kV125

HP 6002A DC POWER SUPPLY 0-50V 0-10A 200W OPT 001

BOARD PEAK 7220 4BP07220D1 + CPU INTEL + 2x 512MB ECC

Agilent / HP 34401A – Digital Multimeter
powers up for parts or repair

ALCATEL 1521 FL IP unit with cables & Power Adapter

SCHAFFNER FN356-16-06 Filter 440/250VAC 50-60Hz

MKS BARATRON MANOMETER 627B -21619 PRESSURE TRANSDUCER

CERAGON NETWORKS WINLINK 104 RT/E1 PN:SW-0001-0

MTI DSP200 Video Processor DAGE-MTI 104662

Sierra Frequency Selective Voltmeter Model 127C

HAMEG HM203 -5 Oscilloscope 20MHz HM 203-5

2 Avaya 4610SW IP Telephone IP

NEW MAR 12-12-35 I ISOLATED DC-DC CONVERTER NEWMAR

HP PROLIANT DL320 G3 3.4GHz 1 GB SERVER

2 Units Aircraft Clock Indicators WAKMANN MFR`S 7510

Enlarge
24 Texas Instruments DSP Floating PT 32-Bit 50MHz

Bellingham & Stanley No-608405

Circle Seal PSI Shutoff Valve T949T-6BB

Tektronix P6139A 500MHz Probe + TEK P6133 Probe Passive

OMRON Programmable Controller SYSMAC CPM2A -60CDT1-D

Inter M PA-9324 PUBLIC ADDRESS POWER AMPLIFIER 240W

D-MUX DAB MULTIPLEXER itis POWER UP.

28 UNITS HP Jetdirect 615N j6057a NetworkCard 10/100tx

CONTROL TECHNIQUES UNIMOTOR UM Model 75UMB200VBCAA

SUN Microsystems Expansion I/O Module 370-6774 -02

ATHENA Temp Controller Type 4X 16-KF-T

RAD HTU-E1 48 / E1 LOS HDSL LOS

GALLON ALLOY / MILLIPORE 155PSI / T 316 L

3Com BOARD 3CB9FG24T / NETWORK SWITCH ADAPTER

SQUARE D COMPANY CIRCUIT BREAKER (15)+ CABINET ELECTRIC

LOTS OF 7 LEACH PRECISION RELAYS 9224-4128 28VDC

AXCELIS MAGNETRON M200PC LOW FREQ. 200P/1/1501 HITACHI

LOT OF 7 HP Notebook OMNIBOOK 6100

NIKON AF TELECONVERTER TC-16A 1.6X Lens

MicroFlex DAP PC9000 Handheld Computer PC-9000

2 C.H.F MULLER TUBES Type 28136 EMISSION 1400mA 6,5V

Fluke 45 Dual Display Multimeter

20 Units Of Analog Devices – AD9713BAN Transistors

WILTRON 560A SCALAR NETWORK ANALYZER

2 UNITS OPTIUM CORPORATION Modl 14TRBRL1MAL Transponder

OMRON Programmable Controller SYSMAC CPM2A -20CDR-A

LOT OF 30 ANALOG DEVICE AD559KD VINTAGE WHIE GOLD IC’s

Aircraft indicator ELECTRIC TURN&BANK for collectors

HP Model 8553B spectrum analyzer – Rf section

Fujinon A16x ZOOM LENS VCL-916BYA Video Camera Lens

DATAMAX LASERCHEK LC2911 + SYMBOL SCAN LCS 2911 + GUID

ASYST CMF CONTROL MODEL:C0094-086​0-01

MDC High VACUUM Model. 990669 / 990668 / 96-82730

Tektronix 465 100 Mhz dual channel oscilloscope / No7

INTERCOMP PT300 DW Wheel Load Scale DIGITAL SCALE TRUCK

AudioCodes Trunkpack-200 & txb-22 & txb-10 PCI

KRAMER VP-82 8×2 RGBHV / BALANCED AUDIO MATRIX

Lot of 14 Motorola Speaker Mics NMN6191B

NOS Hexacon 100W P100 Electric Soldering Iron in box
New old stock, read description

ANTENNA DORNE & MARGOLIN Type DM C100-6 AIRCRAFT

LANNET BUPS-LETS-10/18​E Chassis for Power Supply

Custom Control Sensor CCS IG409 SWITCH PRESSURE FAA-PMA

Schlumberger Technologies Board No. 40911403

VENTILATOR RESUSCITATOR MODEL 2-R used

VENTILATOR RESUSCITATOR MODEL 2 used

MOVAZ NETWORKS 150-1081-01 OLD W/RAMAN AMP RAY OPTICAL

3Com BOARD 3CB9LG9MC / NETWORK SWITCH ADAPTER

Control Techniques Unimotor UM 115UMD300CBCAA

46 AIRPAX ELECTRO Cambridge Switch SPDT BREAKER CONTACT

Little Giant pump 5-MD-HC (583613) 230v 50/60Hz 3000rpm

VARIAN Vacuum VA-160Y traveling wave tube

LOTS OF 350 IRC RN70D MDC 1% 1961F T6940 RESISTORS

RAD ACE-101 ATM-NTU NETWORK ROUTER / AC / SPR

LAIPPLE ANTRIEBSTECHNIC MOTOR TYPE M63S/6 820rpm 50hz

HP 5086-7720 MIXER 22 GHZ

7 ELECTRON TUBE PERKIN ELMER JAN-7665A MFR 25506

NEW! GOOGLE NEXUS ONE 1 HOT EXCLUSIVE RARE DOMAIN NAME!

7 x 30= 210 STRIPS FUJICOLOR PAPER 8.9 x 35.0cm CONTROL

M-AUDIO 1010 LT 1010LT PCI CARD AUDIO

SUPER VEXTA 5-PHASE DRIVER UDX5114N Oriental Motor

HP 1340A DISPLAY OPT 216 / OPT 315

WABCO AIR COMPRESSOR Type 16397799 / 176cm3


选择深圳长欣,选择放心,售后无忧大量现货,当天顺丰发货!
主营:本特利,英维思,伍德沃德,福克斯波罗、西屋、瑞恩、施耐德莫迪康、ABB、AB、西门子、摩托罗拉、GE发那科、安川、博世力士乐,ACSO,力士乐等各大品牌的DCS系统配件,机器人系统配件,大型伺服系统备件。

先介绍几点经验。
1、先通读一遍“系统手册”(不管能不能看懂,先了解个大概,以便学习编程时查找);
2、由位控逻辑入手,逐渐增加定时、计数等条件,把或、与、非关系理顺;
3、进而练习整数运算、实数运算、类型转换;
4、量程转换、PID调节回路的建立及P、I、D参数的理解(最好是有个物理回路验证,比如变频器+电机+测速传感器);
5、循环、顺序、跳转等程序控制(尽量避免跳转,非跳不可时也是跳的越近越好);
6、中断、通讯、位置控制....

本人以ABB工业机器人配件DSQC系列和Motorola MVME系列,GE 卡件 模块 驱动器系列为主攻。各位电工朋友可根据自己的条件选择适合自己的PLC品牌,由于PLC的基本框架大同小异,学会一种至于其它的学习起来也就简单了。