6SN1118-0NJ01-0AA0
產(chǎn)品精品  價(jià)格百年一遇

廈門市思明區(qū)湖濱東路湖光大廈8樓A座結(jié)合PLC的組成和結(jié)構(gòu)分析PLC的工作原理更容易理解。PLC是采用周期循環(huán)掃描的工作方式，CPU連續(xù)執(zhí)行用戶程序和任務(wù)的循環(huán)序列稱為掃描。CPU對(duì)用戶程序的執(zhí)行過(guò)程是CPU的循環(huán)掃描，并用周期性地集中采樣、集中輸出的方式來(lái)完成的。一個(gè)掃描周期主要可分為：
（1）讀輸入階段。 每次掃描周期的開(kāi)始，先讀取輸入點(diǎn)的當(dāng)前值，然后寫到輸入映像寄存器區(qū)域。在之后的用戶程序執(zhí)行的過(guò)程中，CPU訪問(wèn)輸入映像寄存器區(qū)域，而并非讀取輸入端口的狀態(tài)，輸入信號(hào)的變化并不會(huì)影響到輸入映像寄存器的狀態(tài)，通常要求輸入信號(hào)有足夠的脈沖寬度，才能被響應(yīng)。
（2）執(zhí)行程序階段。 用戶程序執(zhí)行階段，PLC按照梯形圖的順序，自左而右，自上而下的逐行掃描，在這一階段CPU從用戶程序的條指令開(kāi)始執(zhí)行直到*后一條指令結(jié)束，程序運(yùn)行結(jié)果放入輸出映像寄存器區(qū)域。在此階段，允許對(duì)數(shù)字量I/O指令和不設(shè)置數(shù)字濾波的模擬量I/O指令進(jìn)行處理，在掃描周期的各個(gè)部分，均可對(duì)中斷事件進(jìn)行響應(yīng)。
（3）處理通信請(qǐng)求階段。 是掃描周期的信息處理階段，CPU處理從通信端口接收到的信息。
（4）執(zhí)行CPU自診斷測(cè)試階段。在此階段CPU檢查其硬件，用戶程序存儲(chǔ)器和所有I/O模塊的狀態(tài)。
（5）寫輸出階段。每個(gè)掃描周期的結(jié)尾，CPU把存在輸出映像寄存器中的數(shù)據(jù)輸出給數(shù)字量輸出端點(diǎn)（寫入輸出鎖存器中），更新輸出狀態(tài)。然后PLC進(jìn)入下一個(gè)循環(huán)周期，重新執(zhí)行輸入采樣階段，周而復(fù)始。
如果程序中使用了中斷，中斷事件出現(xiàn)，立即執(zhí)行中斷程序，中斷程序可以在掃描周期的任意點(diǎn)被執(zhí)行。
如果程序中使用了立即I/O指令，可以直接存取I/O點(diǎn)。用立即I/O指令讀輸入點(diǎn)值時(shí)，相應(yīng)的輸入映像寄存器的值未被修改，用立即I/O指令寫輸出點(diǎn)值時(shí)，相應(yīng)的輸出映像寄存器的值被修改。

REXROTH P-68180-3050 NSFP P681803050

REXROTH P68183-3040 NSFP P681833040

REXROTH HYDRAULIC PUMP A134-276H

REXROTH ZDB-6-VP2-42/200V NSPP ZDB6VP242200V

Rexroth Prop. Amplifier VT3006 Part# VT3006-36 a

Rexroth Indramat Power Line Filter NFD03.1-480-130 CNC

Rexroth Motor, R911308506, MSK050B-0300-NN-M1-UG0-NNNN

REXROTH R9004244278 DBDS20P18/315 VALVE NEW

new REXROTH/BOSCH R166539420 011 (7210) 5101-9638-A LINEAR RAIL BEARING DG

NEW REXROTH SUP-E01-BTV16/40 BATTERY PACK 06W25-I-C-B-H-T

CMC PV4-600 WIRE LUG CONNECTOR 6SN1118-0NJ01-0AA0

ALLEN BRADLEY 1792D-8BVT0D SER.B I/O MODULE DATE CODE:01/01 

ALLEN BRADLEY 40262-001-54 

ALLEN BRADLEY 1494V-FSR233 SER.A FUSE BLOCK 

ALLEN BRADLEY 42GDU-9200-QD SERIES A PHOTOSWITCH 

ALLEN BRADLEY 1734-RTB SER.A & 1734-MBSER.A 

ALLEN BRADLEY MEMORY CARTRIDGE 1785-ME64 SER.A DATE CODE: 02/00 

ALLEN BRADLEY 1492-CB1 G030 SER.C CIRCUIT BREAKER 

ALLEN BRADLEY 1305-BA01A SERIES C 

LOT OF 3 ALLEN BRADLEY 150-A05NB 

ALLEN BRADLEY 2098-DSD-005-SE SER.B SERVO DRIVE 

ALLEN BRADLEY 1771-IGC (+5V) TTL INPUT MODULE 

ALLEN BRADLEY 500-AOD93 SERIES B NEMA AC CONTACTOR 

LOT OF 2 ALLEN BRADLEY AUXILIARY CONTACT 595-A SERIES B 

ALLEN BRADLEY OUTPUT MODULE 1756-OW16I 

ALLEN BRADLEY 160-P1 SER. A PROGRAM KEYPAD MODULE 

ALLEN BRADLEY 2708-DH5A2 SER.A DATA TERMINAL 

ALLEN BRADLEY 1746-NIO4V SER.A ANALOG COMBINATON I/O MODULE 

ALLEN BRADLEY 40116-465-01 DISCONNECT SWITCH 100A 600V 3P 

ALLEN BRADLEY 1492-CB3-H020 
6SN1118-0NJ01-0AA0
LOT OF 3 ALLEN BRADLEY 700-N5 

ALLEN BRADLEY 1777-CB

ALLEN BRADLEY INTERFACE MODULE 1492-IFM20D120 SERIES A 

ALLEN BRADLEY 199-MCA1 SER.A 

ALLEN BRADLEY 1771-IQ16/C ISOLATED DC INPUT

ALLEN BRADLEY 700-C110A12 SER.B CONTROL RELAY 120V 

ALLEN BRADLEY 889R-F5WERM-6F

ALLEN BRADLEY 1305-BA03A-HA2 SER. C AC DRIVE 

ALLEN BRADLEY 2706-E23J32B1 SERIES D REV C FRN-.01 PANELVIEW 

ALLEN BRADLEY 1784-TM6 I/O MONITOR

ALLEN BRADLEY 1792-IB8A MODULE

ALLEN BRADLEY CB236 115-120V 

ALLEN BRADLEY 151083 RV.04 SUPPLY BOARD 

ALLEN BRADLEY 1305-BA06A-HA2 SER.C AC DRIVER 

SEALED ALLEN BRADLEY 150-C9NBD 

ALLEN BRADLEY 1336T-C007-AN-G?TO

ALLEN BRADLEY 1336 OPERATOR PANEL 1336-MOD-F2 

ALLEN BRADLEY 1745-E151 

ALLEN BRADLEY LOOP BACK TEST ADAPTER 1784-AGT 

ALLEN BRADLEY 2364-SPE37A SER.A CONTROL FUSES:2KVA XFMR.460VAC.K 

ALLEN BRADLEY 1772-SD SERIES A 

ALLEN BRADLEY 1786-RPCD SERIES A HUB REPEATER CONTROLNET COAXIAL 

ALLEN BRADLEY 1745-E105 SERIES C EXPANSION UNIT 

LOT OF 10 ALLEN BRADLEY 1734-OW4 SER C OUTPUT MODULE DATE CODE 03/20/12 

ALLEN BRADLEY 1746-ITB16 SERIES C 

ALLEN BRADLEY 2300-SPJ03A SER.A MOV'S:575VAC 

ALLEN BRADLEY 2098-DSD-HV050-?SE SERIES B

ALLEN BRADLEY 100-DNY41R SER.B 

ALLEN BRADLEY 1772-SD SERIES A 

ALLEN BRADLEY 1786-RPCD SERIES A HUB REPEATER CONTROLNET COAXIAL 

LOT OF 2 ALLEN BRADLEY 1492-CB2-G010 

ALLEN BRADLEY 1746-ITB16 SERIES C 

ALLEN BRADLEY 700-FSQ3QU18 SER.B TIMER OFF/DELAY 

ALLEN BRADLEY 1747-L511 SERIES A PROCESSOR UNIT 

ALLEN BRADLEY 3400-TB SERIES A PC BOARD 

ALLEN BRADLEY 2300-SPE04A SER.C FUSE, KLDR, 30A 600V 

ALLEN BRADLEY 1746-OW4 SERIES A

ABB 1SNA630005R0400 INTERFACE RELAY 115VAC 

ALLEN BRADLEY 150-A24NBD SER.A BULLITIN 150 SMART MOTOR CONTROLLER 

ALLEN BRADLEY 1772-LW SER.C MINI-PLC-2/17 PROCESSOR WITH KEYS 

ALLEN BRADLEY 1785-LT SER.B PLC-5/15 PROCESS MODULE 

ALLEN BRADLEY 1756-OV16E 

ALLEN BRADLEY 20-COMM-R SERIES A REMOTE I/O 

ALLEN BRADLEY 872C-D10NP30-E2 SER.C PROXIMITY SWITCH 

ALLEN BRADLEY 1771-IND

ALLEN BRADLEY 2094-BL02 SER A LINE INTERFACE MODULE 

ALLEN BRADLEY 2706-NX6 SERIES G DISPLAY 

ALLEN BRADLEY 150-A500NBD SMART MOTOR CONTROLLER

ALLEN BRADLEY 889D-P4AC-2 SERIES A

ALLEN BRADLEY OUTPUT MODULE 1771-OFE2 SER. B 

ALLEN BRADLEY 1747-L40B SERIES B 

SEALED ALLEN BRADLEY 1771-IJ SERIES A DATE 7/08

ALLEN BRADLEY 1305-BA01A-DE SERIES C 

ALLEN BRADLEY 1336S-CWF50-AN-?FR4

LOT OF 3 ALLEN BRADLEY 1747-L514/B

LOT OF 3 ALLEN BRADLEY 150-A05NB 

ALLEN-BRADLEY 160-BA03NSF1 SERIES C 

ALLEN BRADLEY 1734-IB4 SER.C 24VDC SINK INPUT 

ALLEN BRADLEY 1771-IBD SER. B INPUT MODULE DATE CODE 12/99 

ALLEN BRADLEY 20BD022A3AYNAND?0 SERIES B AC DRIVE 

ALLEN BRADLEY 2300-SPB01A SER.A LINE RC SUPPRESSOR:FOR 230-575VAC 

ALLEN BRADLEY 700-HLT1Z* SER.A W/ 700-TBR24 SER.A TERMINAL BLOCK RELAY 

ALLEN BRADLEY INPUT MODULE 1746-IA8 SERIES A 

ALLEN BRADLEY 1203-CN1 SERIES A

ALLEN BRADLEY INPUT MODULE 1746-IA16 SER.D DATE CODE: 07/06 

ALLEN BRADLEY 1485T-P2T5-T5 SER.B POWER TAP DEVICENET 

ALLEN BRADLEY 1771-P2 SER.A POWER SUPPLY 120/220V 

ALLEN BRADLEY 1746-OV16 SER.C OUTPUT MODULE 

ALLEN BRADLEY MAX-A0G2-EDS SER.A 

ALLEN BRADLEY 700-PKB40 SERIES A LEVEL ADDER DECK 

ALLEN BRADLEY 1746-OW16 SER.D OUTPUT MODULE 
6SN1118-0NJ01-0AA0
ALLEN BRADLEY 40146-747-63 OPERATING HEAD 

ALLEN BRADLEY 1394-AM50 SERIES A 

ALLEN BRADLEY 1771-P4S 

SEALED ALLEN BRADLEY 849-20D124 SERIES B

ALLEN BRADLEY 1792D-4BV4D 

ALLEN BRADLEY OUTPUT MODULE 1756-OF8 SER.A DATE CODE: 12/2010 

ALLEN BRADLEY 1771-IQ16/A

ALLEN BRADLEY 1785-LT2 SERIES A W/ KEY PROCESSOR MODULE 

LOT OF 3 ALLEN BRADLEY 1450-G0 SER.L 

ALLEN BRADLEY 1756-CNB SER.D CONTROL NET COMMUNICATION BRIDGE 

ALLEN BRADLEY 1771-IBD MODULE 

ALLEN BRADLEY 1771-IA 

ALLEN BRADLEY 2112B-CDB-3-6P-?17-26-107-901 

ALLEN BRADLEY 2706-B41J31 DATALINER MESSENGER DISPLAY 

ALLEN BRADLEY 1771-IAD SER.D DATE CODE: 04/11/96 

ALLEN BRADLEY 1745-E105 SERIES C EXPANSION UNIT 

ALLEN BRADLEY 104-A09ND3 SER.B CONTACTOR 120V 

ALLEN BRADLEY 2094-PRF SERIES A 

ALLEN BRADLEY SP-140534 SER.A 

ALLEN BRADLEY 849A-Z0D24 SER.B 120V 

ALLEN BRADLEY 1204-TFA1 SERIES A AC MOTOR TERMINATOR 

ALLEN BRADLEY 1771-PA POWER SUPPLY 

ALLEN BRADLEY 802T-R8TD SER.2 LIMIT SWITCH 

ALLEN BRADLEY 1745-LP101 SERIES C EXPANSION UNIT 

MITSUBISHI A1S61P POWER MODULE 

ALLEN BRADLEY 870-N20 SE.A SENSOR 

ALLEN-BRADLEY 1785-L11B SERIES E PROCESSOR MODULE (NO KEY) 

ALLEN BRADLEY 836-C1X171 PRESSURE SWITCH 600V 

ALLEN BRADLEY 1746-NI4 SER.A ANALOG INPUT MODULE 

ALLEN BRADLEY 2705-K11C1 SER. F KEYPAD DISPLAY MODULE 

ALLEN BRADLEY 2706-P42C SERIES C INVIEWW MESSAGE DISPLAY 

ALLEN BRADLEY 1771-A3B I/O CHASSIS 

ALLEN BRADLEY 1305 KBA06 SERIES A 

ALLEN BRADLEY EXPANSION MODULE 1783-MX08T SER. A 

ALLEN BRADLEY 1336T-C007-AN-G?TO

ALLEN BRADLEY 1771-IQ

ALLEN BRADLEY 1792-IB8A 

ALLEN BRADLEY 1777-CB

ALLEN BRADLEY 1492-MCAA325 

ALLEN BRADLEY 836-C7 SER.A 

ALLEN BRADLEY 8600-1873L COMMUNICATION MODULE 

ALLEN BRADLEY 500-T0D94 SER.B MOTOR STARTER 

ALLEN BRADLEY LINE INTERFACE MODULE 2094-AL09 

ALLEN BRADLEY 440L-R4J0320YD SERIES A SAFETY LIGHT CURTAIN 
6SN1118-0NJ01-0AA0
ALLEN BRADLEY 2711-T10C3 SER. F PANELVIEW FRN 4.46 

ALLEN BRADLEY 22C-D017N103 SER A AC DRIVE 

ALLEN BRADLEY 22A-A4P5N114 SERIES A AC DRIVE 

ALLEN BRADLEY 800T-9TZ SERIES M PUSH BUTTON ENCLOSURE 

ALLEN BRADLEY 1746-NI4 SER. ANALOG INPUT MODULE (MISSING COVER) 

ALLEN BRADLEY STARTER 505-B0*23 SERIES C 

ALLEN BRADLEY 1794-ACN15 SERIES D ADAPTER FOR CONTROLNET 

ALLEN BRADLEY 155739 REV.01 DISPLAY DRIVER 

ALLEN BRADLEY DRIVE 1336S-A010-AA-E?N4-L6