描述
一般小型(低檔)PLC具有邏輯運算、定時、計數(shù)等功能,對于只需要開關(guān)量控制的設(shè)備都可滿足。
對于以開關(guān)量控制為主,帶少量模擬量控制的系統(tǒng),可選用能帶A/D和D/A轉(zhuǎn)換單元,具有加減算術(shù)運算、數(shù)據(jù)傳送功能的增強型低檔PLC。
對于控制較復雜,要求實現(xiàn)PID運算、閉環(huán)控制、通信聯(lián)網(wǎng)等功能,可視控制規(guī)模大小及復雜程度,選用中檔或高檔PLC。但是中、高檔PLC價格較貴,一般用于大規(guī)模過程控制和集散控制系統(tǒng)等場合。
(四)響應速度要求
PLC是為工業(yè)自動化設(shè)計的通用控制器,不同檔次PLC的響應速度一般都能滿足其應用范圍內(nèi)的需要。如果要跨范圍使用PLC,或者某些功能或信號有特殊的速度要求時,則應該慎重考慮PLC的響應速度,可選用具有高速I/O處理功能的PLC,或選用具有快速響應模塊和中斷輸入模塊的PLC等。
(五)系統(tǒng)可靠性的要求
對于一般系統(tǒng)PLC的可靠性均能滿足。對可靠性要求很高的系統(tǒng),應考慮是否采用冗余系統(tǒng)或熱備用系統(tǒng)。
(六)機型盡量統(tǒng)一
一個企業(yè),應盡量做到PLC的機型統(tǒng)一。主要考慮到以下三方面問題:
1)機型統(tǒng)一,其模塊可互為備用,便于備品備件的采購和管理。
2)機型統(tǒng)一,其功能和使用方法類似,有利于技術(shù)力量的培訓和技術(shù)水平的提高。
3)機型統(tǒng)一,其外部設(shè)備通用,資源可共享,易于聯(lián)網(wǎng)通信,配上位計算機后易于形成一個多級分布式控制系統(tǒng)。
歐美品牌停產(chǎn)的,常用的“PLC”備品備件
我司產(chǎn)品應用于以下領(lǐng)域:
1,《發(fā)電廠DCS監(jiān)控系統(tǒng)》
2,《智能平鋼化爐系統(tǒng)制造》
3,《PLC可編程輸送控制系統(tǒng)》
4,《DCS集散控制系統(tǒng)》
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5,《智能型消防供水控制系統(tǒng)》
6,《化工廠藥液恒流量計算機控制系統(tǒng)》
7,《電氣控制系統(tǒng)》造紙,印染生產(chǎn)線,變電站綜合自動化控制系列
本特利,英維思,伍德沃德,福克斯波羅、西屋、瑞恩、施耐德莫迪康、ABB、AB、西門子、摩托羅拉、GE發(fā)那科、安川、博世力士樂,ACSO,力士樂等各大品牌的DCS系統(tǒng)配件,機器人系統(tǒng)配件,大型伺服系統(tǒng)備件。
N69740 B.Braun Biotech 884201/9 Bioreactor w/Dispenser
N69743 The Baker Company SG603-TX SterilchemGARD III
C56823 Dage Microtester 22 10kg Shear Test Load Cell
C70560 Royce MBS200 Wire Bond Pull Tester MBS 200
K70517 HP Agilent E7101-67936 Prober Tester PTI*NIB*
A58949 ESEC SA Wafer Mounter 650.010/6
A58556 Beckman Multimek 96 Automated 96-CH Pipettor
A38873 Tektronix RTD720A Real Time Digitizer w/Display
N59240 Nicolet 5DXC FT-IR Spectrometer
A72207 Lot of Quality Transformers Corp.10kVA,7.5kVA
A72210 Lot of Lithonia Lighting Reflectors,HID Housing
C53689 Tenney 5 Environmental Chamber(m/n T5-2-100350)
C52722 MCT 4600 Chip Carrier IC Handler for 84PLCC
C52721 MCT 4610 Chip Carrier IC Handler for 28PLCC
C52701 MCT 4600 Chip Carrier IC Handler for 52PLCC
N69895 IPM Balanced Power II BP1125-2020
G63881 Forma Scientific 8525 Bio Freezer
G63896 Forma Scientific 8425 Bio Freezer
G63902 Forma Scientific 8325 Bio Freezer
C52694 MCT 3608E IC Handler for 300mil 20pin DIP 3608E3
C52696 MCT 3616E IC Handler(m/n 3616E48P)
C70012 Dage Microtester 22 500gm Shear Test Load Cell
C68808 Davidson Optronics D657-100A Autocollimator
C52790 Dage Microtester BT22 5kg Pull Test Load Cell
C52792 Dage Microtester BT22 200g Pull Test Load Cell
C52791 Dage Microtester BT22 1.5kg Pull Test Load Cell
C67867 Dage BT22-LC02 50gm Pull Test Load Cell for BT22
K72114 Titertek Plus ICN Flow M96V Washer,S20 Stacker
K70248 Equipe Technologies ATM-3108 Wafer Loader Robot
K67967 Inter-Lakes 4436 Press/Splitter Vibration Table
G66211 Labcyte EDR-384SII Multi Dispenser,Automated
Y72289 Elga Purelab Ultra GE MK2 DNA Water Purification
Y72303 Millipore Labscale TFF System Pump Stirrer 29751
K66949 CEE 2100 Cassette to Cassette Hotplate System
AP42588 Parker HPD67 Servo Amplifier CA-112405-R
G40949 Eastey Ent.Shrink Packaging Tunnel ET 1610-48
N67899 Tektronix TCA-1MEG High Buffer Amplifier
G70599 Six Tektronix P6135A 150MHz 10X Probes NIB
C72847 Haskris R050EW WaterCooled Recirculating Chiller
C72848 Haskris R050EA Air-Cooled Recirculating Chiller
C64550 Blue M OV-560A-2 Lab Oven(120V,1Ph,to 400°F)
C71024 Sigma Systems SuprCyclr Environmental Chamber
G72011 Varian ProStar 420 Autosampler
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A69318 Thermo Forma-86C ULT Freezer,Model 8558
G53115 Poly Mold Hydraulic Press&Racine Supervane Pmp
A68353(2)Lindberg Tube Furnaces Type 54357,54357A
A58114 Disco DWT-13R Water Temperature Control Unit
A60985 Kato Laboratory Temperature Oven-70°C~180°C
A69994 Nalorac Z-Spec Pulse Tune Driver,Level 2B
A59232 Sanyo Seiki SR7150-0002C-Z Robotic Arm
A64354 Genetix QPIX Colony Picking System
A64357 Mettler Toledo Myriad Allex Automated Chemistry
C72661 Nunome Electric 90kVA 200VAC 260A Transformer
Y72290 Eppendorf 5417C Bench Top Centrifuge 14K RPM
C70101 Blue M OV-490A-3 Mechanical Convection Oven
C51211 Tektronix TLA 7N4 136Ch LA Module 2GHz/200MHz/1M
C51209 Tektronix TLA7M4 136Ch LA Module 2GHz/100MHz/512
G72042 THK GL15S16+1250L Positioning Linear Stage
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A58604(2)Varian 3700 Gas Chromatograph,Autosampler
N72631 Welch 2025 Self Cleaning Dry Vacuum System
K72111 BioCad Perfusion Chromatography LAB Workstation
N72630 Bio/Data PAP-4 Platelet Aggregation Profiler
A72284 Nanometrics 7200 Film Thickness System,Olympus
C72666 MECS Asyst OF250 Wafer Prealigner&Controller
C53058 Eutectic Heated Work Holder 6″Wafer Hot Chuck
C54375 Hot Chuck Wafer Stage 8.25″w/Digital Controller
A52645 NuAire NU-3700 Dual CO2 Water Jacketed Incubator
C68411 Bradley GPS Positioning Navigation Test Station
AT51338 Daikin Industries UBR3E6 Brine Chilling Unit