1.2 CPU212的結(jié)構(gòu)及工作原理
CPU212的工作原理是建立在下列單元的基上的：*，程序存儲(chǔ)器中存儲(chǔ)用戶程序；第二，處理器周期性掃描程序，即在一個(gè)周期開(kāi)始時(shí)，處理器將所有的輸入端的信號(hào)讀入，存儲(chǔ)于過(guò)程輸入映象寄存器(PII)，然后，在內(nèi)部計(jì)數(shù)器、位存儲(chǔ)器和定時(shí)器的控制下逐步掃描程序，接著處理器將新的信號(hào)狀態(tài)和過(guò)程輸出到映象寄存器(PIQ)中，并從這里傳送到輸出端。CPU212的結(jié)構(gòu)及工作原理示意圖如圖2所示。
1.3 CPU212的外部特征
CPU212外部包括輸入點(diǎn)、輸出點(diǎn)、編程口、面版狀態(tài)指示燈。CPU是PLC的大腦，它根據(jù)編制的應(yīng)用程序作出相應(yīng)的決定，而輸入/輸出是PLC的控制點(diǎn)。輸入用于監(jiān)視現(xiàn)場(chǎng)裝置，如開(kāi)關(guān)、傳感器等，輸出用于控制其它裝置，如電機(jī)、泵、開(kāi)關(guān)等；編程口用于連接編程裝置，如一臺(tái)計(jì)算機(jī)或手持編程器等。要裝載SETP7－MICRO/DOS軟件才能對(duì)CPU212進(jìn)行編程。由于CPU212的編程口傳輸信號(hào)采用的是RS－485標(biāo)準(zhǔn)，而計(jì)算機(jī)串行通訊口采用的是RS－232標(biāo)準(zhǔn)，因此連接時(shí)需要使用PC/PPI電纜將CPU212和計(jì)算機(jī)連接起來(lái)。由于PC/PPI電纜自帶轉(zhuǎn)換器，可完成兩種不同標(biāo)準(zhǔn)信號(hào)的轉(zhuǎn)換。如圖3所示。
◆ 企業(yè)名稱：廈門(mén)泰尼電氣有限公司
◆ 企業(yè)性質(zhì)： 有限責(zé)任公司
◆ 主營(yíng)業(yè)務(wù)：DCS,PLC
◆ 經(jīng)營(yíng)模式： 貿(mào)易
◆ 貿(mào)易地區(qū)： 全國(guó)
◆ ： 小廖女士）
◆ ：
◆
◆ :
◆ （備注“01008”收）
◆ ：
◆ 郵政編碼： 361026
LOT OF 45 SWAGELOK UNIONS 710-6-316
BECKMAN AN-G 42,040RPM CENTRIFUGE ROTOR
BECKMAN AN-F 52,640RPM RPM CENTRIFUGE ROTOR
BECKMAN AN-HTI 67,770 RPM CENTRIFUGE ROTOR
PFEIFFER BALZERS TPU 060 TURBO PUMP AS IS
MJ RESEARCH PTC-100 PELTIER THERMAL CYCLER
BRANDEL CELL HARVESTER VERY NICE
ORIGINAL LOT OF 2 FRITZ HANSEN CHAIRS AS IS
LINDBERG 51333 OVEN FURNACE 1500C
HOEFER AUTOMATIC GEL STAINER
DELTECH FURNACE OVEN CONTROL EUROTHERM 2404
CARVER MODEL C LABORATORY PRESS
METLAP BUEHLER DISPENSING SYSTEM W/ MANUAL PURGE
MIXMOR FGL-14 115/208-230V LABORATORY MIXER
DBI/SALA 75-310LBS ULTRA-LOK SELF RETRACTING LIFELINE
SIEMENS JXD63B400 H CIRCUIT BREAKER 400 AMP GOOD CONDIT
AMEL 433A POLAROGRAPHIC ANALYZER
MATHESON LAB OVEN 52750-10 120V
BARRINGER INSTRUMENTS IONSCAN
LOT OF 20 WESTINGHOUSE TYPE BA CIRCUIT BREAKER 15 AMP
WORCESTER 10 755WM2 ACTUATOR
LUDLUM DETECTOR CART 237 GEIGER COUNTER
WORCESTER CONTROLS 75 VALVE ACTUATOR 10 752W
LAB-LINE 3545 WATERBATH WORKING WITH LID
BECKMAN DU640 DU640 SPECTROPHOTOMETER
WORCESTER SERIES 39 OUTPUT TORQUE 3820 IN LBS ACTUATOR
HOBART 1712 AUTOMATIC MEAT CUTTER
DAYTON HC170 PUM 32831E GAS PRESSURE WASHER 1200PSI
GAERTNER SCOPE ON STAND 52" TALL chathetometer
PM WAVETEK PACIFIC MEASUREMENT 1045 RF POWER METER
STRYKER 988 ENDOSCOPY CAMERA WITH RING
STRYKER 988 ENDOSCOPY CAMERA
MITUTOYO- INTERNAL MICROMETER- 368 HOLTEST SERIES-2.8"
ANTIQUE FORD MOTOR STANDARD SET 44 HEIGHT GAUGE GAGE BU
Wild/Leica Prism Kit with GDF22 Tribach and GPR1 Prism
Barnstead Thermolyne D4641 E-Pure Water Filtration Syst
K&E Keuffel & Esser Level Scope SHA
W. & L. E. Gurley TRANSIT 47300 SURVEY
Vintage Dietzgen 6000 Series TRANSIT
XOMOX MXAB01200F 1" VALVE ACTUATOR XRP-XS025-S-B
Narishige IM-200 Microinjector Micro Injector Control
ANDERSEN C28A ORIFICE TRANSFER STANDARD FILTER
ANDERSEN AIR FILTER WITH GAST PUMP
PBM MP-E-19V 3 WAY BALL VALVE 3 1/2"
RAYMOND MAR-250-30 ACTUATOR ELECTRIPOWER BRUNSWICK
RAYMOND MAR-160-8-4 ACTUATOR ELECTRIPOWER BRUNSWICK
SQUARE D POWERLOGIC ENERCEPT METER 8012 100 AMP
YORK ISN RECIPPAK REMOTE CONTROL CENTER FOR CHILLER
MOORE 675A1N PRESSURE CONTROL AIN
BIO-RAD GENE PULSER II
KEITHLEY 502A MILLOHMMETER MILLOHM METER
STOVALL LIFE SCIENCE MODEL 640 GENECHIP HYBRIDIZATI
STOVALL BELLY DANCER HYBRIDIZATION WATERBATH
NASCO LIFE FOAM INJECTABLE TRAINING ARM LF00698U
GILSON MINIPULS 3 PERISTALTIC PULSE FREE FLOW PUMP WORK
L'AIR BT-40 AIR LIQUIDE DEWAR
L'AIR BT-437 AIR LIQUIDE DEWAR
PHARMACIA ULTROSPEC III SPECTROMETER
PORT 850G ACTUATOR
ROVER GAMMA RAY & X-RAY SPECTROSCOPY SYSTEM
CISCO CATALYST 3550 WS-C35550-1G SWITCH
CRITIKON DINAMAP COMPACT BP
R. WOLF LASER SCOPE 8204.359
R. WOLF 25 DEGREE PANOVIEW PLUS SCOPE 8880.433 NICE
Lab-Line Model 3527-5 Environ Bench-Top Orbital Incubat
Radionics Pace-1A Stimulator
Packard 9200 Hydrogen Generator B920000
DRANETZ POWER SYSTEM POLY METER 325
ABI KRATOS SPECTROFLOW 980 PROGRAMMABLE FLUORESCENCE DE
SERATA GEOMECHANICS PERMISSIBLE CLOSURE RATE METER CEM
ACUSON C7 ULTRASOUND PROBE TRANSDUCER
GE 548C ULTRASOUND PROBE TRANSDUCER
ALOKA UST-959-3.5MHZ TRANSDUCER PROBE ULTRASOUND
SIEMENS 2.5PL20 ULTRASOUND TRANSDUCER PROBE ELEGRA
TECHNIK SYMMAR 1:,6/135 1:12/235 LINHOF LENS 8644682
GE 7/TR 46-285515G1 ULTRASOUND TRANSDUCER PROBE
GE ULTRASOUND TRANSDUCER PROBE 5/TV
ARMSTRONG F&T STEAM TRAP 15-B8
DURAFOAM STAINLESS SPRAYER TANK 5 GALLON
DIONEX CONDUCTIVITY GENERATOR CDM-1 PAD-2 CMS-1 GOOD CO
LOT OF 2 THERMO 580B OVM PHOTO IONIZATION MONITOR
ESC ENVIRONMENTAL SYSTEMS PARTICULATE MONITOR P-5A
CPU212的面板狀態(tài)指示燈用于顯示CPU的運(yùn)行方式和I/O狀態(tài)。所有狀態(tài)指示燈每秒刷新多次，并用于指示CPU212內(nèi)部診斷測(cè)試結(jié)果。I/O指示燈用于指示傳感器輸入狀態(tài)和CPU控制的輸出狀態(tài)(導(dǎo)通則亮)。如圖4所示。
若I/O點(diǎn)未接，在通電時(shí)只有CPU狀態(tài)指示燈顯示CPU運(yùn)行方式。當(dāng)系統(tǒng)出現(xiàn)內(nèi)部錯(cuò)誤時(shí)，紅色的SF指示燈亮，此時(shí)應(yīng)切斷電源，清除故障。
會(huì)員1.png)
社旗县|
连城县|
菏泽市|
清苑县|
怀安县|
泸定县|
舟山市|
邻水|
南开区|
射洪县|
西和县|
台东市|
池州市|
嵩明县|
丹东市|
台安县|
宁夏|
囊谦县|
合川市|
买车|
延庆县|
穆棱市|
渭源县|
卢氏县|
体育|
咸丰县|
西乌珠穆沁旗|
永吉县|
青阳县|
沙洋县|
怀远县|
黄平县|
望江县|
阜宁县|
潼南县|
正定县|
琼中|
慈利县|
隆回县|
城市|
元氏县|