6ES7 400-0HR00-4AB0
6ES7 400-0HR00-4AB0
6ES7 400-0HR00-4AB0
莫格電氣自動(dòng)化提供DCS PLC備件，產(chǎn)品服務(wù)于用戶安裝的控制系統(tǒng)（集散控制系統(tǒng)，可編程控制器，面板控制器和驅(qū)動(dòng)器），在供應(yīng)超過(guò)65個(gè)不同的國(guó)家。
以“專業(yè)、 誠(chéng)信、創(chuàng)新、合作、共贏”的經(jīng)營(yíng)理念、不斷開(kāi)發(fā)新產(chǎn)品、為客戶提供優(yōu)質(zhì)服務(wù)、以大限度追求客戶滿意、并不斷開(kāi)拓新領(lǐng)域業(yè)務(wù)。
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：祖巧麗
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PLC自檢信號(hào)很多，內(nèi)部器件也很多，多數(shù)使用者未充分發(fā)揮其作用。
其實(shí)，*可利用它進(jìn)行PLC自身工作的監(jiān)控，或?qū)刂茖?duì)象進(jìn)行監(jiān)控。
這里介紹一種用PLC定時(shí)器作看門狗，對(duì)控制對(duì)象工作情況進(jìn)行監(jiān)控的思路。
如用PLC控制某運(yùn)動(dòng)部件動(dòng)作，看施加控制后動(dòng)作進(jìn)行了沒(méi)有，可用看門狗辦法實(shí)現(xiàn)監(jiān)控。具體作法是在施加控制的同時(shí)，令看門狗定時(shí)器計(jì)時(shí)。如在規(guī)定的時(shí)間內(nèi)動(dòng)作完成，即定時(shí)器未超過(guò)警戒值的情況下，已收到動(dòng)作完成信號(hào)，則說(shuō)明控制對(duì)象工作正常，無(wú)需報(bào)警。
若超時(shí)，說(shuō)明不正常，可作相應(yīng)處理。
如果控制對(duì)象的各重要控制環(huán)節(jié)，都用這樣一些看門狗"看"著，那系統(tǒng)的工作將了如指掌，出現(xiàn)了問(wèn)題，卡在什么環(huán)節(jié)上也很好查找。
還有其它一些監(jiān)控工作可做。對(duì)一個(gè)復(fù)雜的控制系統(tǒng)，特別是自動(dòng)控制系統(tǒng)，監(jiān)控以至進(jìn)一步能自診斷是非常必要的。它可減少系統(tǒng)的故障，出了故障也好查找，可提高累計(jì)平均*運(yùn)行時(shí)間，降低故障修復(fù)時(shí)間，提高系統(tǒng)的可靠性。
MASONEILAN DRESSER 4" POSITIONER VALVE 33-34625 104168
ALCON 120V, 60Hz, 112PSI, 176oF GENERAL PURPOSE VALVE V3-31-21-12
NUMATICS 14.5-145PSIG-AI?R, SOLENOID VALVE 134JJ600O00000 *NEW,SEALED*
BONNEY FORGE 1/2" 800 GATE VALVE A105N CR13 / 087743-*002 99178
NUMATICS 232PSIG 16BAR SOLENOID VALVE I22BB600R061D61 *NEW, SEALED*
GRACO * VALVE * C10A
ALCO SOLENOID COIL XA1702-9 NEW IN BOX
VERSA SOLENOID VALVE 2 POSITION
FIVE STAR SEAL SERIES 84 FLUID SEAL 4-3/4" 316SS 84-38SV NIB
NUMATICS FLOW CONTROL VALVE TM0-2001 *NEW*
VELAN SS316 CLASS 150 CWP SIZE 12 KNIFE GATE VALVE L180320C-13BL
JAMESBURY BALL VALVE 08266026J VPVL051 SR4/5 BLT FO C
FESTO 16BAR BRANCHING MODULE FRM-H-D-MINI
BRAY DOUBLE ACTION PNEUMATIC ACTUATOR 90-0830-21320-5?32 W/ SAUNDERS 3" VALVE
JAMESBURY 4" VALVE 5150 313600TT ACTUATOR ST-200 B W/ PMV POSITIONER P-2000
ASCO * RED HAT SOLENOID VALVE NIB * 8320G176
UNKNOWN MANUFACTURER * 90 STAINLESS ELBOW * 1-150
ITT ENGINEERED VALVES FABRI-VALVE 150CWP 14" KNIFE GATE VALVE C37S316
SOLENOID VALVE COIL, 27-462-2 D
NUMATICS 24VDC .20A 150 PSIG-AIR DBL SOLENOID VALVE W/ BASE, A13BB515RT47R *NEW*
PARKER 110/120V .28/.35A 3000 PSI DIRECTIONAL CONTROL VALVE, D1W20B-Y-31-FN
FISHER CASCADE AUTOMATION VALVE POSITIONER SERIES 3600
VICKERS PRESSURE COMPENSATED FLOW CONTROL VALVE, FG-3-63-K-10, NNB
MAC 20-120PSI SOLENOID VALVE W/ MANIFOLD & REGULATOR 92B-BAB-CJ4-DM-?DDAP-1DN
MILWAUKEE VALVE COMPANY BALL VALVE 2000 W0G
NUMATICS 150PSIG-AIR, 24VDC, 4.0W SOLENOID VALVE I34BA400MP00061 *NEW, SEALED*
SMC 0.15-1.0MPA 21-26VDC SOLENOID VALVE VFS2300-5FZ 104225
NIBCO 1" TRIM VALVE KT-65
ROVALVE 150PSI 16" KNIFE GATE VALVE S17-D MSS/HYC
PARKER 24VDC 6.0W 150 PSI PNEUMATIC SOLENOID SPRINT VALVE, AL43VXXBK04900B *NEW*
NUMATICS 120V, .11A, 50/60Hz, SOLENOID VALVE 152SA425K000030 *NEW,SEALED*
SPORLAN THERMOSTATIC EXPANSION VALVE EA03PC 462 NIB
PARKER 24VDC 6.0W 150 PSI PNEUMATIC SOLENOID SPRINT VALVE, AL43VXXBK04900B *NEW*
NUMATICS 120V, .11A, 50/60Hz, SOLENOID VALVE 152SA425K000030 *NEW,SEALED*
SPORLAN THERMOSTATIC EXPANSION VALVE EA03PC 462 NIB
NULLMATIC PRESSURE REGULATOR 4952-73/7LK / 42-30
LEGEND 2"NPT 150WSP 600WOG 2 WAY SHUT-OFF BALL VALVE T-1001
SMC PNEUMATIC SOLENOID VALVE VQ1101-5
