描述
CPU主要由運(yùn)算器、控制器、寄存器及實(shí)現(xiàn)它們之間聯(lián)系的數(shù)據(jù)、控制及狀態(tài)總線構(gòu)成,CPU單元還包括外圍芯片、總線接口及有關(guān)電路。內(nèi)存主要用于存儲(chǔ)程序及數(shù)據(jù),是PLC不可缺少的組成單元。
在使用者看來,不必要詳細(xì)分析CPU的內(nèi)部電路,但對(duì)各部分的工作機(jī)制還是應(yīng)有足夠的理解。CPU的控制器控制CPU工作,由它讀取指令、解釋指令及執(zhí)行指令。但工作節(jié)奏由震蕩信號(hào)控制。運(yùn)算器用于進(jìn)行數(shù)字或邏輯運(yùn)算,在控制器指揮下工作。寄存器參與運(yùn)算,并存儲(chǔ)運(yùn)算的中間結(jié)果,它也是在控制器指揮下工作。
CPU速度和內(nèi)存容量是PLC的重要參數(shù),它們決定著PLC的工作速度,IO數(shù)量及軟件容量等,因此限制著控制規(guī)模。
4 I/O模塊
PLC與電氣回路的接口,是通過輸入輸出部分(I/O)完成的。I/O模塊集成了PLC的I/O電路,其輸入暫存器反映輸入信號(hào)狀態(tài),輸出點(diǎn)反映輸出鎖存器狀態(tài)。輸入模塊將電信號(hào)變換成數(shù)字信號(hào)進(jìn)入PLC系統(tǒng),輸出模塊相反。I/O分為開關(guān)量輸入(DI),開關(guān)量輸出(DO),模擬量輸入(AI),模擬量輸出(AO)等模塊。
常用的I/O分類如下:
開關(guān)量:按電壓水平分,有220VAC、110VAC、24VDC,按隔離方式分,有繼電器隔離和晶體管隔離。
模擬量:按信號(hào)類型分,有電流型(4-20mA,0-20mA)、電壓型(0-10V,0-5V,-10-10V)等,按精度分,有12bit,14bit,16bit等。
除了上述通用IO外,還有特殊IO模塊,如熱電阻、熱電偶、脈沖等模塊。
按I/O點(diǎn)數(shù)確定模塊規(guī)格及數(shù)量,I/O模塊可多可少,但其最大數(shù)受CPU所能管理的基本配置的能力,即受最大的底板或機(jī)架槽數(shù)限制。
歐美品牌停產(chǎn)的,常用的“PLC”備品備件
我司產(chǎn)品應(yīng)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)》
?
5,《智能型消防供水控制系統(tǒng)》
6,《化工廠藥液恒流量計(jì)算機(jī)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(dòng)化控制系列
本特利,英維思,伍德沃德,??怂共_、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(jī)器人系統(tǒng)配件,大型伺服系統(tǒng)備件。
MKS 146B 4 Channel MFC Gas Mass Flow Controller 146 B
Comet Mini Vacuum Capacitor 15kV 210pF MC1C-210 E/15
Advanced Energy AE RFG 2000-2V RF Generator 3155053-007
Leybold Ionivac High Vacuum Ion Gauge Controller IM110D
Leybold Turbovac TMP 50 High Vacuum Turbo Pump ISO 100
MKS 2 Torr Baratron Pressure Transducer 122BA-00010EB
MDC High Vacuum Gate Valve NW KF QF 50 KGV-2000V-P-03
Nor-Cal High Vacuum Isolation Valve conflat 221-921-900
Lot of 6 Fujikin Gas Flow Control Valves 2 manifolds
Advanced Energy PDX900-2V RF Generator AMAT 3156024-110
Spellman High Voltage Power Supply Pre Load RSB40X3995
Kaiser KSI High Voltage Power Supply+1 kV 1A S1-1-1000
Varian High Voltage Surge Suppressor E11029161 Edal HVR
AE Advanced Energy RFG 1251 RF Generator 3155107-001 B
AE Advanced Energy RFX 2500 RF Generator 3155011-000
Advanced Energy Apex 3013 RF Plasma Generator 3kW AE
RFPP RF5S RF Generator RF 5S Plasma Advanced Energy AE
Glassman+5 kV 20mA High Voltage Power Supply HV
Trazar Paralax Igniter RF Generator 27MHz 1200W IG270
MKS 146C Vacuum Gauge Measurement Control System 146 C
Varian Turbo V 300 ICE MacroTorr High Vacuum Turbo Pump
AMAT 8330 Micro-Match RF Matching Network 0010-00799
NEW RFPP Advanced Energy Harmonic Filter 1 kW 350kHz AE
Advanced Energy AE RFG/AZX Control Panel 3155050-000A
Eaton Ion Implanter Surge Protection Bd 1504260 HV kV
Applied Materials 8100 D System DC Power Supplies AMAT
AMAT Applied Materials MXP+RF Match Network Tuner
AMAT Applied Materials MXP+RF Match Network Tuner
Advanced Energy AZX63 RF Match 3155031-014 AMAT
AE Advanced Energy APEX 3013 RF Generator AMAT Working
Applied Materials AMAT CVD RF Match 0010-9750W Tested
Advanced Energy AE GenCal RF Power Head PMH 400/2200
Glassman KL High Voltage Power Supply-30 kV 100mA
RFPP Advanced Energy RF 10S Power Amplifier MRF150 NEW
Hitek Hivolt High Voltage Power Supply-30 kV 1kW HV
LAM Research 13.56MHz RF Match Network Kiyo Poly Etch
NEW Astech ATL-100RA LF RF Match Network 500W RFPP AE
Applied Materials RF Match Phase 4 AMAT P/N 0010-09416
BOC Edwards EPX 180L Dry Molecular Vacuum Pump Tested
Advanced Energy AE HTCM RF Match AZX Control Module
Leybold Turbovac 450 Turbo Pump NT450 w/Cable,Rebuilt
AE Advanced Energy AZX90 RF Match 3155031-011B AMAT
Varian Turbo V 301 Navigator Control Unit 9698973
Systron Donner M107 Precision DC Voltage Source Tested
Dressler Advanced Energy ProSys Mega Pulse RF Generator
Applied Materials Ion Implanter Arc Control DSP
Advanced Energy AE Multifunction RF Match 3156035-100
AE Advanced Energy LF-10A 1000W Generator 3150010-001E
ADVANCED ENERGY AE-4855015 USPP AE4855015
AE Advanced Energy RFDS 2000-2V RF Gen.3155038-013 2kW
AE Advanced Energy MDX-L6 Magnetron 3152343-000A
AE Advanced Energy RF10M RF20M User Manual 5708513 NEW
AE Advanced Energy MDX-5K Power Supply 2011-035-Y 5kW
AE Advanced Energy RFDS 2000-2V RF Gen.3155038-013C
AE RFPP Advanced Energy LF-5 500W Generator 3150012-009
AE Advanced Energy 3152334-000B AMAT Applied Materials
AE Advanced Energy PDX 1250 RF Generator 3156024-131A
AE Advanced Energy MDX-20K Master 3152223-003-Y 20kW
AE Advanced Energy Navigator 1013 RF Match 3155126-017A
AE ADVANCED ENERGY CABLE
AE Advanced Energy RFPP LF-5 Generator 7520572050 500W
AE Advanced Energy RF Match Network 3155031-014D
AE Advanced Energy PDX 1250 RF Generator 3156024-131A
AE ADVANCED ENERGY PDW2200 RF GENERATOR
AE Advanced Energy RFPP RF Match 7621993020 working
AE Advanced Energy 2500W RF Match 3150275-007G working