產(chǎn)品精品 價(jià)格百年一遇
6SN1123-1AA01-0FA1
廈門市思明區(qū)湖濱東路湖光大廈8樓A座XCXDXEXF用PLC-01的常開(kāi)開(kāi)關(guān)表示,當(dāng)XCXDXEXF取值不是(0001,0010,0011,0100,0101)時(shí),L1閃亮表示出錯(cuò),按停止按扭無(wú)效。必須取XCXDXEXF為(0001,0010,0011,0100,0101)后,再按停止按扭,復(fù)位一下,再按起動(dòng)按鈕,則L2亮表示可以進(jìn)郵件,同時(shí)M5亮,S1產(chǎn)生1s的脈沖閃亮。在這基礎(chǔ)上當(dāng)XCXDXEXF取值0001時(shí),表示郵編個(gè)數(shù)字為1,當(dāng)按下S2表示檢測(cè)到了,脈沖開(kāi)始計(jì)數(shù),經(jīng)五個(gè)脈沖后M1亮2s,表示開(kāi)頭為1的郵編進(jìn)北京的郵箱,同時(shí)M5,L2,S1滅2s。當(dāng)XCXDXEXF取值0010時(shí),表示郵編個(gè)數(shù)字為2,當(dāng)按下S2表示檢測(cè)到了,脈沖開(kāi)始計(jì)數(shù),經(jīng)十個(gè)脈沖后M2亮2s,表示開(kāi)頭為2的郵編進(jìn)上海的郵箱,同時(shí)M5,L2,S1滅2s。當(dāng)XCXDXEXF取值0011時(shí),表示郵編個(gè)數(shù)字為3,當(dāng)按下S2表示檢測(cè)到了,脈沖開(kāi)始計(jì)數(shù),經(jīng)十五個(gè)脈沖后M3亮2s,表示開(kāi)頭為3的郵編進(jìn)天津的郵箱,同時(shí)M5,L2,S1滅2s。當(dāng)XCXDXEXF取值0100時(shí),表示郵編個(gè)數(shù)字為4,當(dāng)按下S2表示檢測(cè)到了,脈沖開(kāi)始計(jì)數(shù),經(jīng)二十個(gè)脈沖后M4亮2s,表示開(kāi)頭為4的郵編進(jìn)武漢的郵箱,同時(shí)M5,L2,S1滅2s。當(dāng)XCXDXEXF取值0101時(shí),表示郵編個(gè)數(shù)字為5,當(dāng)按下S2表示檢測(cè)到了,脈沖開(kāi)始計(jì)數(shù),經(jīng)二十五個(gè)脈沖后,M5,L2,S1滅2s,表示開(kāi)頭為5的郵編進(jìn)廣州的郵箱。當(dāng)開(kāi)頭為1的郵編檢測(cè)到了,但M1還沒(méi)亮?xí)r,轉(zhuǎn)變XCXDXEXF的值,發(fā)生錯(cuò)誤L1閃亮,情況就跟開(kāi)頭說(shuō)的一樣了,以此類推當(dāng)其他號(hào)碼檢測(cè)到了,但還沒(méi)投進(jìn)箱子時(shí),轉(zhuǎn)變號(hào)碼就發(fā)生錯(cuò)誤。當(dāng)郵編投進(jìn)郵箱后再按S2表示檢測(cè)到郵件工作。
對(duì)復(fù)雜的程序可先將程序分成幾個(gè)簡(jiǎn)單的程序段,每一段從*左邊觸點(diǎn)開(kāi)始,由上之下向右進(jìn)行編程,再把程序逐段連接起來(lái)。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)。6SN1123-1AA01-0FA1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。
ABB Master Basic I/O Unit DSDX 452 L or DSDI 452
Schneider Modicon Graphic Terminal XBTGT7340 XBT GT7340
PR ELECTRONICS 5202B ,PULSE ISOLATOR.
CARRIER Transicold Micro
ELCON SERIES 1000 Isolated Trip Amplifier mA/V, Pot/Rtd
Lavel Alarm unit HANLA AU 160D
SIEMENS 6ES7 613-1SB02-0AC0 (6ES76131SB020A?C0) HMI GEA
PEPPERL+FUCHS INTRINSICALLY SAFE BARRIER TYPE: Z479/EX
6SN1123-1AA01-0FA1
MTL5025 Measurement Technology Low Current Limited Loop
MTL5021 Measurement Technology Limited Loop-powered sol
Barrier 16 channel Idlc EB3C-R16CD
PR Electronics 2204 ISOLATION AMPLIFIER .
Mitsubishi FX2N-32DP-IF-D FX2N32DPIFD Profibus-DP Inter
TOSHIBA S2E PU612E,PLC CPU GDU612*S
Alfa Laval temperature sensor/ thermocouple 1764391-01
OMRON CPM1A-30CDR-D-V?1 PROGRAMMABLE CONTROLLER
TELEMECANIQUE TSX-ASY-800 USPP TSXAEY800 USED
Advantech ADAM-4019+ 4019 Analog Input Module Remote Da
Mitsubishi Melsec Input FX2N-16EX-ES/UL FX2N16EXES/UL
Advantech UNO-2050 GX1-300 Universal Network Controller
TELEMECANIQUE Magelis MICRO PLC TWDLCDA16DRF + DISPLAY
DEIF Selectable AC-Transducer, TAS-311DG
SELCO M-1000 (M1000-24-00B) Alarm Annunciator Monitor
OMRON G730-VID 16-B REMOTE I/O Input/Output TERMINAL 24
TELEMECANIQUE Magelis MICRO PLC TWDLCDA16DRF + DISPLAY
OMRON CPM1A-30CDR-D-V?1 PROGRAMMABLE CONTROLLER
ENDRESS + HAUSER RMA422 RMA422-B22A21A
ALFA LAVAL AlfaLaval Oil Purifier Separator Controller
Mitsubishi FX2N-16EYR-ES/U?L FX2N16EYRESUL FX2N16EYR
Hydraulic Boiler Tube Expander ALFA LAVAL
SELCO OVER CURRENT RELAY T2400-04,3-PHAS?E DUAL OVER CUR
Omron CS1W-AD081-V1 Analog Input Unit A/D Unit
PEPPERL+ FUCHS KFD2-WAC-EX1 KFD2WACEX1
Carrier Transicold Micro
Honeywell UDC3500 Controller used UDC35000-00-0A0?0-200
JUMO DiTRON 32 Microprocessor Controller
PR Electronics 5104B Repeater/Power Supply 5104B
MTL5041 Repeater Power supply 4/20 mA,for 2 wire transm
AS-BADU-204 Modicon Tsx Compact Analog Input AS-BADU-20
ADAM ADAM-4060 date acquisition RELAY OUTPUT MODULE ADA
MEASUREMENT TECHNOLOGY LTD TWO-CHANNEL SWITCH / PROXIMI
PR Electronics 5105B Ex Isolated Driver 5105BB2A X 20
HONEYWELL Temperature Controller DC3001-0-000-1-?00-0111
TURCK MULTI MODUL MK13UPFf-EX0/k0?6
6SN1123-1AA01-0FA1
PR Electronics 2284 Isolation Amplifier, f/I - f/f CON
PR Electronics AC/DC Transmitter 2279
FUJI ACT1A-1N MOTOR GUARD RELAY 100-110VAC MOTOR OVER H
PEPPERL & FUCHS KFD2-SR2-EX2.W SWITCH AMPLIFIER 2 CH IS
MTL5044 TWO CHANNEL REPEATER POWER SUPPLY 4/20mA FOR 2
Rotational speed monitor with analog output turck,MK21
MMCII 3 Mitsubishi Micro-Computer Recorder Controller C
Programmable Universal Trip Amplifier 4131
FUJI ELECTRIC DIGITAL OUTPUT MODULE NP1Y16R-08
Carrier Transicold 12-01123-00SV I/O Board Container Re
TELEMECANIQUE MODICON TSX PREMIUM TSX-DMY-28FK ,USED TS
Toshiba PLC TBU266**S,PS31 CPU PU234E + AD268 X 1, RO
SAIA Burgess PCA1.A21 (PCA1A21) PCA1.W1 (PCA1W1) PCA1.B
MTL 3043 dc isolator,1/40mA , Measurement Technology LT
ABB DI620 DIGITAL INPUT Used
ALFA LAVAL, Viscochief Interface Box +Sensor
ALFA LAVAL, Viscochief Interface Box +Sensor
DEIF ALARM UNIT AL8-2 Annunciator
PORTALEVEL LIQUID LEVEL MEASURING DEVICE NSN 6680-99-1
MTL 3042 dc isolator,4/20mA , Measurement Technology LT
Endress+Hauser Process Display Red Display RIA250-A21G2
GE Fanuc IC693CPU331S Series 90-30 CPU Module IC693CPU3
PR TRIP AMPLIFIER 2231
NEW Omron CS1W-AD081-V1 Analog Input Unit A/D Unit6SN1123-1AA01-0FA1
SIEMENS PROCESS CONTROLLER SIPART DR-20 6DR 2001-1
MTL 3022 SOLENOID/ ALARM DRIVER , Measurement Technolog
PEPPERL + FUCHS KFU8-GUT-EX1D, Part No:113605
PR Electronics PROGRAMMABLE TRANSMITTER PR 5114B
OMRON H2F-D TIME SWITCH LOT OF 3(THREE)
SIEMENS SUPER HEAT CONTROLLER RWR62.73
Used PEPPERL FUCHS KFD2-UFC-Ex1.D KFD2UFCEx1D
PR Electronics TRIP AMPLIFIER 2237
TURCK INTERFACE MODUT IM1-121Ex-R/24V DC/SWITCHING AM
SELCO FREQUENCY RELAY T3000-02 OVER / UNDER Frequency M
PEPPERL FUCHS KFD2-ELD-Ex16 16 CHANNEL EARTH LEAKAGE DE
PEPPERL+FUCHS KFD0-TR-EX1 INTRINSIC SAFE RTD CONVERTER
FUJI NP1X1606-W Digital Input Module
6SN1123-1AA01-0FA1