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PLC程序設計中傳送和比較指令的作用

這些數據可以從輸入端口上連接的外部器件獲得，需要使用傳送指令讀取這些器件上的數據并送到內部單元；初始數據也可以用程序設置，即向內部單元傳送立即數；另外，某些運算數據存儲在機內的某個地方，等程序開始運行時通過初始化程序送到工作單元。

(1) 機內數據的存取管理

在數據運算過程中，機內的數據傳送是*的。運算可能要涉及不同的工作單元，數據需在他們之間傳送；運算可能會產生一些中間數據，這需要傳送到適當的地方暫時存放；有時機內的數據需要備份保存，這要找地方把這些數據存儲妥當?？傊瑢σ粋€涉及數據運算的程序，數據管理是很重要的。

此外，二進制和 BCD 碼的轉換在數據管理中也是很重要的。

(2) 運算處理結果向輸出端口傳送

運算處理結果總是要通過輸出實現對執行器件的控制，或者輸出數據用于顯示，或者作為其他設備的工作數據。對于輸出口連接的離散執行器件，可成組處理后看作是整體的數據單元，按各口的目標狀態送入一定的數據，可實現對這些器件的控制。

(3) 比較指令用于建立控制點

控制現場常有將某個物理量的量值或變化區間作為控制點的情況。如溫度低于多少度就打開電熱器，速度高于或低于一個區間就報警等。作為一個控制“閥門”，比較指令常出現在工業控制程序中

Cutler Hammer Cat: ND3800T32W 3 P 800 A600 V w/ trip: 8NES800T shunt: SNT5LP11K

Cutler Hammer CHMDL3800F 3 Ph 600 Volt 800 Amp 

Cutler Hammer EOP4MT07 120 VAC 

Cutler Hammer HMDL3800F with MT3600T 800Amp 600 volt 65k@480v 

Cutler Hammer HND312T33W 1200A MAX 600VDigitrip RMS 310 NO

ND3800T32W Eaton Cutler Hammer ND 50k 800A 600V 

EATON HLAM3400 HLAM1000v Mining Breaker400a 

CUTLER HAMMER KES3400LSG 3P 400A 

Cutler Hammer RED HKD3400F KT3300T trip 400 amp 600v HKD65K

HLD3600 HLD Cutler Hammer 600A 600V 3P w/ LES3600LS Trip+ SNT4LP11K 

Cutler Hammer cat: HJD3250F 3 pole 250 amp 600

FD3150K Eaton CutlerHammer 3 pole 150 amp 600v ser C 

Eaton Cutler HammerL630H LGH3630NN 500 amp trip 600VAC600A 

Eaton Cutler HammerL630H LGH3630NN 600amp LT360032 LSI Trip 600VAC 

FPE Federal PacificHM HM631225 HM6322253P 225a 600v

Cutler Hammer HFD-DC HFDDC3200HFDDC3200WF01 200 amp 600 VDC

Cutler Hammer 3 Pole200 Amp 600 Volt Mining Circuit BreakerCat: E2J3200W

Eaton Cutler HammerHMCP250W5W 3P 250A 600V 

WESTINGHOUSE MC3800FCIRCUIT BREAKER 800AMP 3 POLE 600 VOLT800a Plug

Cutler Hammer HJD3250F 3 pole 225 AMP TRIP 600 

CHKD3400 Cutler Hammer 400 amp 600 voltwith KES3400LS 

HFD3030LA02 Cutler Hammer HFD 30 amp 600volt with A1X1PK 1490D72G06 NEW HFD3030

Cutler Hammer DK3400W 400 AMP 3 Pole DK65 

Cutler Hammer HMCP400K5C 400 AMP 3 Pole600 VAC 

HFD3125 Eaton CutlerHammer 3 pole 125 amp 600v ser C 

FD3225L Eaton CutlerHammer 3 pole 225 amp 600v ser C 

Cutler Hammer 3 Pole15 Amp 600 Volt Mining Cat: E2F3015A04U64

FDC3015 Eaton CutlerHammer 15 amp 600v100kA@480v 

LSB360250E Eaton Cutler Hammer LSB 250 amp 600 volt 

Cutler Hammer HFD3200 HFD 3P 600V 200 AMP 

HMCP250W5C Cutler Hammer 250 amp 600 volt 

NGFCT120 Eaton Cutler Hammer 

Cutler Hammer HFD2100 w/ SNT1RP08K 2 Pole 100 Amp 600 

Cutler Hammer HFD3100L 3P 600V 100 AMP 65K @ 480 

Cutler Hammer 1372D35G22 32-120 VAC 

Cutler Hammer HKD3400F 200 AMP 3 Pole 600 VAC HKD3200 

Cutler Hammer CCH2225 2 Pole 225 Amp 240

Eaton QBGFEP1020W2 1P 20 AMP 

Cutler Hammer HMCPE100R3C 3P 600V 100 AMP 

Cutler Hammer ELHFD3090L 3 Pole 480 Volt90 Amp Circuit Breaker w/ GFP ELD143

Eaton Cutler HammerHFD-DC HFDDC3225 HFDDC3225WF01 225 amp 600 VDC 

Cutler Hammer Cat: HFD3050 3 pole 50 amp600 volt 

Eaton Cutler Hammer CC3125X CC3125 125 amp Type CC 

HFD3030 Eaton CutlerHammer 3 pole 30 amp 600v ser C 

HFD3040L Eaton Cutler Hammer 3 pole 40 amp 600v ser C 

HFD3015L Eaton Cutler Hammer 3 pole 15 amp 600v ser C 

HFD3040 Eaton CutlerHammer 3 pole 40 amp 600v ser C 

HFD3015 Eaton CutlerHammer 3 pole 15 amp 600v ser C 

Cutler Hammer JD3250F 250 AMP Trip 3 Pole 600 VAC 

SYNCHRO Clifton Precision 11-BHW-40E/F447 

EATON Cutler HammerLD LT3400T 3P 400A 

HFD3030 Cutler Hammer 30 amp 600 volt ser C 

CUTLER HAMMER DK3250W CIRCUIT BREAKER DK65k 240 VOLT 250AMP KT3250T 

HMCP250W5W Cutler Hammer 250 amp 600 volt 

ED3225 Eaton CutlerHammer 225 amp 240 volt 65kA 

Cutler Hammer HFD3100 w/ SNT1RP08K 3 Pole 100 Amp 600 

Eaton CVS2125XMM 2P240V 125 AMP 42 kAIC 

Cutler Hammer KPRL4MD 800 Amp 600 Volt 3Ph 

Eaton Cutler Hammer FDB3100LSeries C 100A 600VAC

Eaton CCVH2125X 2P 120/240V 125 AMP 25kAIC 

Cutler Hammer Westinghouse FD3125LS FD3125 125 amp 600 

GENERAL ELECTRIC GERECORD PLUS FBN36TE100R2 

CUTLER HAMMER EGS3060FFB E125S 35kA@480V3 POLE 

Cutler Hammer Low Energy 28 VDC Shunt Trip LST4LPK 

Cutler Hammer HMCP050K2C 3P 600V 50 AMP

Square D FHP36090TF90 AMP 3 Pole 

HFD3225 Cutler Hammer 225 amp 600 volt 3Pole 

Cutler Hammer HFD3090 90 AMPS HFD 65k 600VAC 3 Pole 

HFD3150L Cutler Hammer HFD 150 amp 600 volt Lug to Lug HFD3150 

HFD3125L Cutler Hammer HFD 125 amp 600 volt Lug to Lug HFD3125 

CUTLER HAMMER EGH3020FFB E125H 65kA@480V 3 POLE 

Cutler Hammer 3 Pole70 Amp 600 Volt 65kA @ 480V Cat: HFD3070

Square D Cat: EJB34030 3 pole 30 amp 480

Cutler Hammer FD3125125 AMP 3 Pole FD35k 600VAC 

HMCP100R3C Cutler Hammer ser C 100 amp 600v 

takeout Eaton Cutler Hammer RED HFD3035 

CUTLER HAMMER EGS3025FFB E125S 35kA@480V3 POLE 

EHD3025 Eaton CutlerHammer 25 amp 480 volt 3 Pole 14kA 

Cutler Hammer HFD3015 3 pole 15 amp 600volt 65kA@ 480V Cat:HFD3015

EHD3015L Eaton Cutler Hammer 15 amp 480volt 3 Pole 14kA 

Eaton EGS3020FFB E125S EGS 3P 600V 20A 

Eaton EGS3050FFB E125S EGS 3P 600V 50A 

Eaton EGS3060FFB E125S EGS 3P 600V 60A 

EATON Cutler Hammer800a Rating 

Eaton Cuter Hammer 150 Amp 120/240 VoltCircuit Breaker Cat:ED3150BP10 

Eaton Cutler HammerHFD3050 HFD 3 Pole 600 Volt 50 Amp 

EHD3015 Eaton CutlerHammer 15 amp 480 volt 3 Pole 14kA 

Cutler Hammer FD21502 pole 150 amp 600

EHD3020 Eaton CutlerHammer 20 amp 480 volt 3 Pole 14kA 

EHD3030 Eaton CutlerHammer 30 amp 480 volt 3 Pole 14kA 

EHD3060 Eaton CutlerHammer 60 amp 480 volt 3 Pole 14kA 

EATON Cutler HammerHFD3090 90AMPS HFD 65k 600VAC 3 Pole 

EHD3010 Eaton CutlerHammer 10 amp 480 volt 3 Pole 14kA 

Takeout Eaton Cutler Hammer HFD3030RED 30 amp 600v 3 pole HFD 65k

FD3150KW Eaton Cutler Hammer 150 amp 600v Molded Case Switch100kA 

Cutler Hammer red label HFD3100 HFD65k100 amp 600 vac 3 pole 

Eaton PD6D12A120 Digitrip RMS 

SIEMENS ITE EH3-B0403P 480V 40 AMP 

Cutler Hammer Cat: HFD3015 3 pole 15 amp600v 

Cutler Hammer HMCPE050K2C 50 amp 3 pole600V 

CUTLER HAMMER WESTINGHOUSE ED3125 ED65K125 AMP 240V 

Heinemann Circuit Breaker 200 Amp GJ1-H3-U-0200-01C

Cutler Hammer CHB1201 Pole 20 Amp 120/240 

Cutler Hammer EGB3030FFG EGB 3P 480V 30A

Cutler Hammer GMCP015E0C 3P 480V 15A 

Heinemann Circuit Breaker 250 Amp GJ1-H3-U

Cutler Hammer KT3400T KD HKD 3P 600V 400A 

Cutler Hammer HMCPE015E0C 3P 600V 15A 

Cutler Hammer ED32003P 240V 200A 

Cutler Hammer HFD3080 3P 600V 80A 

Cutler Hammer HFD3030L 30 AMP 600VAC 3 Pole 65 K 

EATON CUTLER HAMMERHFD3020 3 pole 20 amp 600 volt BLUE HFD65K 

Liebert Display Controller Assy 02-790871-30 Rev 2 P/L 3

Cutler Hammer ED3175Red Label 3 Pole 175 Amp 240 V 

CUTLER HAMMER BLUE LABEL ED3125 ED65K 125 AMP 

Cutler-Hammer Breaker FD3020 FD35K 20 AMPS 600VAC 250VDC 

Surplus Cutler Hammer HMCP015E0 3 pole 15 amp 600

Allen-Bradley Line Voltage Monitor Relay813S-VOA

Cutler Hammer HFD3030 HFD 3 Pole 30 Amp600 

Cutler-Hammer HMCPE007C0C 3P 7A HMCPE HMCP E 

Bryant BJ3225 Type BJ 3P 240V 225A 

Cutler Hammer BAB3080HS1 3 pole 240v 80amp 

Cutler Hammer FDB3100L 3P 600V 100A 14k

Cutler Hammer HFD3030 HFD 3 Pole 30 Amp600 

Cutler Hammer KT3350T K Frame 3P 350 AMP

SIEMENS ITE EH3-B0503P 480V 50 AMP 

Cutler Hammer FDB3100 3P 600V 100A 

Eaton Cutler HammerCH360ST 3 Pole 60 Amp 

Cutler Hammer FD3070Red Label 70 amp 3pole 600v FD35k 35kA@480v 

HMCPE030H1C Cutler Hammer motor circuitprotector 30A 480V

Cutler Hammer QBGFEP1030 1 pole 30 amp 

Westinghouse Eaton FDB3150 3P 600V 150A

CC3200YJ Eaton Cutler Hammer 200 amp 3 pole 240v CC3200 

Bryant BJ3225 Type BJ 3P 240V 225A 

C30DN5 Cutler HammerAC Lighting Contactor 60 amp with 240vcoil 2526-2

Cutler Hammer SNT125DPK 110-125 VDC 

Eaton Cutler HammerEHD3080 EHD 3 Pole 80 Amp 480 

Cutler Hammer HMCPS015E0C 3P600V 15A

Bryant BJ3225 Type BJ 3P 240V 225A 

Allen Bradley Cat:1942-LG35 

Eaton Cutler HammerEHD3080 EHD 3 Pole 80 Amp 480 

Cutler Hammer C371ELower Oper. Mech. Kit 150A 

Cutler Hammer HMCPS050K2C 3P 600V 50A 

Cutler Hammer EHC3040 type EHC 3 pole 40 amp 480 

Cutler Hammer CHB320 3 pole 20 amp 

Eaton Cutler Hammer QBGFEP1020 20 amp 1

Eaton Cutler HammerEHD3050 EHD 3 Pole 50 Amp 480 

Eaton Cutler HammerEHD3050 EHD 3 Pole 50 Amp 480 

Cutler Hammer FD3020Blue label 20 amp3 pole 600 volt 25kA@480v 

Cutler Hammer KPRL4FD Mounting HardwareKit For KPRL4B 

Takeout Eaton QBGFEP1030 30AMP 1 Pole 

Eaton Cutler Hammer CH250SUR 2 pole50 amp

Cutler Hammer HMCP015E0C HMCP 3Ph 600V 15A 

Eaton QBHW3030HS 3P120/240V 30A CircuitBreaker w/ 120-208-240V

Eaton Cutler Hammer2 Pole 200 Amp MainBreaker Cat: BW2200

Cutler Hammer FDB3060 3 pole 60 amp 600volt series C 

Cutler Hammer CCV2150X 2P 120/240V 150A

Eaton Cutler HammerFS320060 3 pole 240volt 60 amp 

Cutler Hammer CH260GF 2 Pole 60 Amp 

Cutler Hammer KPRL4FD Mounting HardwareKit For KPRL4B 

Cutler Hammer motorcircuit protector HMCP030H1C 30 amp 600

Siemens Circuit Breaker B31500S01 15 Amp3 Pole 240V GOOD!

Automation Direct Foot Switch red/ greyCat: APS1143-VO-M

Cutler Hammer HMCP015E0C HMCP 3Ph 600V 15A 

Bryant BJ3225 Type BJ 3P 240V 225A 

Eaton Cutler HammerFS340020A 20 amp 3pole 480 

Cutler Hammer FDB3050 3P 600V 50A

Cutler Hammer BAB2100S BAB 2 Pole 100 amp 

Cutler Hammer EHD3040 3 pole 40 amp 

Cutler Hammer CH390L3 Pole 90 Amp 240V

6LES400T Cutler Hammer 400 amp L 

HMCPE015E0C Eaton Cutler Hammer 

Surplus Cutler Hammer EHC3030 

3TA400K Eaton CutlerHammer Lug TerminalKit 3/0-250 MCM 3 Pole 

GFEP130 Eaton type BR 1 pole 30 amp 

Cutler Hammer GHB3040 40 AMP 3 Pole 

Cutler HammerQBGFEP1030 30AMP 

ALLEN BRADLEY 702-TAD91 AC CONTACTOR

CUTLER HAMMER Westinghouse ED2175 240V CUTLER HAMMER ED2175175A 240V 2P 

CH3100 Long Cutler Hammer CH 3 pole 100amp 240 

Cutler Hammer EC3030EC 3P 240V 30A 

Cutler Hammer CSR2200 200 AMP 2 Pole CSR25k 120/240VAC 

XO250 Cutler HammerSquare D type XO 2 pole 50 amp 120/240 

Cutler Hammer Eaton3 Pole 60 Amp 22k CAT: QBHW3060H

Cutler Hammer Westinghouse FD25k FD20202 pole 20 amp 600

Cutler Hammer EHD3030 3 Pole 30 AMP 480VAC 

Eaton Cutler HammerEHD3020 3 pole 20 amp 480V 

Eaton Cutler HammerEHC3020 3 pole 20 amp 480 

Cutler Hammer Gi 1253 Pole 277/480V 30Amp

Eaton Cutler Hammer2 Pole 200 Amp MainBreaker Cat: BW2200

Eaton Cutler HammerCircuit Breaker Adapter J-705 E-104765 Used FL360080

GB-223E 175A Circuit