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  某些應用要求輸入數(shù)據(jù)與預置數(shù)據(jù)值相比較。有時是單個數(shù)字與別的數(shù)字之間相比較，有時是一個數(shù)字與一個預置范圍值相比較。



一個加熱控制系統(tǒng)要求當前溫度對照一個溫度范圍來校核，此范圍規(guī)定了一個周圍工作環(huán)境。本例將存儲在D010中的溫度值，由調(diào)溫器THR1讀出，與K19和K25作比較。這溫度范圍表示一個舒適的辦工環(huán)境。做完比較，必須有一個結(jié)果，這個結(jié)果經(jīng)比較得到3個主要狀態(tài)，即>、=、<。這3個狀態(tài)可用位標志表示，本例中使用了M20到M22。
所有情況中，當空氣調(diào)節(jié)器為ON ( X000有效)，電扇會運行，即輸出Y002為ON。這是因為所有的指示標志起動這個輸出。當房間溫度低于規(guī)定范圍時，標志M20被激活，起動輸出Y000，使加熱設備HT1運行。如果房間太熱，即實際房間溫度超過規(guī)定范圍，標志M22激活輸出Y003，冷卻器工作。
Ametek 80471SE Rev V

Fisher Scientific 03-692-164 FB 

Rexroth B 830 303 440 I/U2-U/I 

Fisher 2U224033272, 2" Linear 

Measurex 05327605 GP60 

Kone MAC Door Control Board 104 P-24783-003

Johnson Controls V47AB-6C, 3/4" Water 75-135F

Entek XM-122 gSE Vibration, 1440-VSE02-01RA, with XM-940 

Fisher 26A6336X002 

Fisher 28A8569X022 8" Seal Retainer

Allen-Bradley 1P0574B Z761 

Avtron 630242 Rev B, A18295

STROMBERG ABB AI086-8/4, 57275812, ALLEN-BRADLEY 3100-AIO

Lorentzen & Wettre ABB 30004131, Ver 11, MSU-2

ABB YPH 105A, YT204001-DY/1 

Berthold LB4710-080 

ABB Stromberg SEPU 220VAC, 57287799, Allen-Bradley 3120-P2

ABB Stromberg DO86-16, 57275758, Allen-Bradley 3100-DO

Measurex 05357500, Rev A FSK 

Fisher R3570X0H12 Repair Kit, Types 3570 & 3570R 

Westinghouse HMCP, 150 amp Circuit Breaker, 600 VAC, 3 pole, HMCP150U4C

Johnson Controls V47AD-2C 1" Water Valve 115-180F

Simplex Expansion  566-074

Northern Elevator Field Brake Control FBB8707

ABB Stromberg SAFT 156 CPL, 57773740

Measurex 05345102, Rev F, 

Homewood Products Corporation HPC 217A700G15

Secomam BP106 Pastel-UV 











Allen-Bradley 1P0515B-Z752 

ABB Stromberg Transducer SCGU 2Y1, 54315538 K

Gamma Instruments NN 926A NOR8600

Westinghouse 6630D61G02 

ABB Stromberg SGHF 1000 AB Terminal Block, 57424699 J

ABB 57275847 USART86-INT Allen Bradley Stromberg 200042 

ABB Stromberg FDC86-UNIT2, 57772182, Allen-Bradley 3250-FC1

FAG NU318E.M1.C3 

Garlock Paperpak 4200 Packing, 41420-4064, 1" (25.4 mm)

FAG H2336 Bearing 

Ronan X96N-SM Transmitter, C23434-1645

ABB SAFT 103 COM Control Board, 57777290

TB Woods 336014M85 

Horton Clutch Repair Kit 994305

ABB Stromberg SAFT 157 CPT, 57773774

Data-Linc Group SRM6210E 902-928 MHz 

Measurex 05363000 ECC 

IRD 970 Accelerometer

Eaton Cutler-Hammer C800JNY2 Series CB1 Contactor, R53-03-012

Fisher Scientific Accumet 13-620-160 

Cutler-Hammer KD-K Switch 400A, KD3400SKW, Style 8985A71G01

Data-Linc SRM6000 

Martin Engineering CD36-390 Electric Vibrator, 330/575V, MVSI 3/200-S90

PepperL+Fuchs HART  HPSM/32/TB-02

SATO WPC Plus Mini-LAN for Enchancement US, 11S000358

Foxboro P0917LY  FPS400-24, Rev 0D

Fisher 28A8568X022 6" Seal 

Flowserve X-201 XC3B2375X33-02 Mechanical Seal, 133022, 1.968" 

Garlock Packmaster #6 41606-3048 3/4" 

Garlock Packmaster #6 41606-3064 1" 

Garlock Packmaster #6 41606-3058 7/8" 

SKF 22322 EK Spherical 

Safematic SFP-08-10 (NPT) 

SKF 23122 CCK/C3W33 

Dodge 005060 3-7/16 

Measurex 05374100 Transistion Board GP63

Fisher 17A8172X022

Fisher 2N1309-02202

COEN PSDM-2000  Module, 2643-064-01

Johnson Controls V47AB-3C, 1/2"  Valve 115-180F

Norgren F18-C00-M3DA 2" Filter

GEC Alstom MCGG22L1CD1003E 

Foxboro P0972AJ-0L

Marsh BC-352 Printhead, 27699

ABbaseA QAPR 222 V Indicator, YL261001-PP

Honeywell FF-SPE44TXE 









ABB SDT-VKB-2, 57294477 

ABB Terminal Block DI/DO86-32CHF, 58172855 C

Allen-Bradley 592-A2NF Overload Relay, 96-300A

ABB YM321001-Z 

Icon Research WiVib-2 

Accu-sort XLT200 Rev 2A 

Measurex 05353500, Host I/F, VPU

Flowserve Durametallic X-101 Seal, BM 133023, 2.750" Seal Dia, 2.362" 

Entek XM-320, Allen-Bradley 1440-TPS02-01RB 

Cutler-Hammer DTMV01 Digitrip MV, Style 3D86762