TC-ODX161
TC-ODX161
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65個(gè)不同的國家。
以“專業(yè)、 誠信、創(chuàng)新、合作、共贏”的經(jīng)營理念、不斷開發(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、并不斷開拓新領(lǐng)域業(yè)務(wù)。
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:祖巧麗
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PLC控制系統(tǒng)主要由輸入部分、CPU、采樣部分、輸出控制和通訊部分組成,如圖1所示。輸入部分包括控制面板和輸入模板;采樣部分包括采樣控制模板、AD轉(zhuǎn)換模板和傳感器;CPU作為系統(tǒng)的核心,完成接收數(shù)據(jù),處理數(shù)據(jù),輸出控制信號(hào);輸出部分有的系統(tǒng)用到DA模板,將輸出信號(hào)轉(zhuǎn)換為模擬量信號(hào),經(jīng)過功放驅(qū)動(dòng)執(zhí)行器;大多數(shù)系統(tǒng)直接將輸出信號(hào)給輸出模板,由輸出模板驅(qū)動(dòng)執(zhí)行器工作;通訊部分由通訊模板和上位機(jī)組成。
因?yàn)镻LC本身的故障可能性極小,系統(tǒng)的故障主要來自外圍的元部件,所以它的故障可分為如下幾種:
(1)輸入故障,即操作人員的操作失誤;
■傳感器故障;
■執(zhí)行器故障;
■PLC軟件故障
這些故障,都可以用合適的故障診斷方法進(jìn)行分析和用軟件進(jìn)行實(shí)時(shí)監(jiān)測(cè),對(duì)故障進(jìn)行預(yù)報(bào)和處理。
PLC控制系統(tǒng)的故障診斷方法
PLC控制系統(tǒng)故障的宏觀診斷
故障的宏觀診斷就是根據(jù)經(jīng)驗(yàn),參照發(fā)生故障的環(huán)境和現(xiàn)象來確定故障的部位和原因。PLC控制系統(tǒng)的故障宏觀診斷方法如下:
■是否為使用不當(dāng)引起的故障,如屬于這類故障,則根據(jù)使用情況可初步判斷出故障類型、發(fā)生部位。常見的使用不當(dāng)包括供電電源故障、端子接線故障、模板安裝故障、現(xiàn)場(chǎng)操作故障等。
■如果不是使用故障,則可能是偶然性故障或系統(tǒng)運(yùn)行時(shí)間較長(zhǎng)所引發(fā)的故障。對(duì)于這類故障可按PLC的故障分布,依次檢查、判斷故障。首先檢查與實(shí)際過程相連的傳感器、檢測(cè)開關(guān)、執(zhí)行機(jī)構(gòu)和負(fù)載是否有故障:然后檢查PLC的I/O模板是否有故障:zui后檢查PLC的CPU是否有故障。
■在檢查PLC本身故障時(shí),可參考PLC的CPU模板和電源模板上的指示燈。
■采取上述步驟還檢查不出故障部位和原因,則可能是系統(tǒng)設(shè)計(jì)錯(cuò)誤,此時(shí)要重新檢查系統(tǒng)設(shè)計(jì),包括硬件設(shè)計(jì)和軟件設(shè)計(jì)。
UFM TYPE 4 FLOW METER MN-FSB50GMV-12-?32V1.0-A1WD
DEZURIK 2" NPT, 20 PSIG GLOBE VALVE 854806-1BA0-1C6?-1T
VAT HV ANGLE VALVE 21640-QA41-AAKZ?/0001 1506578/1 NEW IN BOX
ASCO RED HAT VALVE SC8210G2MO
HAM-LET 2000 PSI 3/4 INCH NPT LOCKING BALL VALVE, H-700-SS-L-3/4-?T-LD
MANNESMANN REXROTH 250V 5A HYDRAULIC SOLENOID VALVE, H-4WH 25 E61//41 SO12
YARWAY 3/4" 250 PSI CAST IRON Y STRAINER, 901
JAYCO, 3/4" NPT, 125 PSI, 248 SCFM, VALVE TD
MAC 150 PSI SINGLE PRESSURE REGULATOR VALVE, PR63D-21AA *NEW*
PFEIFFER VACUUM AUTOMATIC VENTING VALVE TSF 012 *NEW*
LADISH 4" 150CWP GATE VALVE 4001-068
FESTO 24VDC FEILDBUS DIRECT VALVE INTERFACE, CPV18-GE-DN2-8
ROVALVE 150PSI 12" KNIFE GATE VALVE S17-A MIN/HYC
FESTO VMPA2-FB-EG-4 ELECTRONICS MODULE & SOLENOID VALVES W/ CONNECTION PLATE
FESTO CPV10-VI U502 CPV10-GE-ASI-8E?8A-Z-M8 MANIFOLD W/ (6) 161 414 U502
CROSBY 3" PRESSURE RELIEF VALVE STYLE 2J3 J0S-E-15-C
VNE 1000 WOG 1 INCH DN25 STAINLESS STEEL BALL VALVE
MILWAUKEE VALVE 1/2" NPT, 125 SWP HORIZONTAL SWING CHECK VALVE
GRACO 38MM I.D. 79MM O.D. SEAT VALVE, 180529 *NEW*
SMC PRESSURE REGULATOR NIB IR3020-N02G
AIRCO 250 PSI APPROX 7/8" NPT AIR REDUCTION VALVE, 801-0233
ASCO RED HAT VALVE 8262G232 NIB
BELOIT 250PSI PRESSURE REGULATOR MC2-75-120B NIB
ROSS / DECCO, 2-10 BAR, 3-POLE MALE, 24VDC, SOLENOID VALVE, W6076B2437 / 316K33
NUMATICS 150 PSIG 1-1/2" NPT IN/OUT 1" NPT EXH. LOCKOUT VALVE, VT40N12Y
RICHDEL 120VAC DIAPHRAGM VALVE, I205PVN120ACNC
JAMESBURY 1" BALL VALVE 5150 313600 TT
ASCO 11.6 W PNEUMATIC SOLENOID VALVE EV8316G081V / EV8007G1 NNB
NACHI MODULAR VALVE OCY-G03-B-Y-50
AUTOMATIC VALVE 10BAR 150PSIG PNEUMATIC SOLENOID VALVE S31C-DB-6
1" BALL VALVE PN40
VICKERS PRESSURE REDUCING VALVE DGMX1 3 PB BW 20
SWAGELOK, 150oF, 1500 PSI, 0.188" TUBE OD, BALL VALVE, SS-62VS4-JL-KL-?T *NEW*
CASHCO * PRESSURE REGULATOR 1/2" 150'' * RF DA1 SST/CT/PF/D
ASCO RED-HAT 3/8" 20W 120PSI SOLENOID VALVE COIL NIB EF80172 103639
ROSS 2773A5072 110/120 VOLTS 50/60 HERTZ 3/4" IN/OUT PORT L-O-X VALVE
FESTO 145 PSI 1/4" NPT PNEUMATIC AIR VALVE W/O LEVER, TH-5-1/4-B
AMERICAN INDUSTRIAL 150-250PSI 350°F HEAT EXCHANGER AA-608-3-4-FP
UNION CARBIDE PUROX REGULATOR R-2047
CANFIELD SOLENOID CONNECTOR VDC/VAC NIB 6-48
BRASS 1/2" T FITTING LOT OF 20
BOSCH 3600PSI SOLENOID VALVE 081WV06P1V1010K?M024/00E51 *NEW, NO BOX*
COLONIAL * 2" * ND10 NW50 DA63 NNB
HAYWARD 2" CPVC UNION BALL VALVE SOCKET TB2200ST
PARKER 250 PSI 1/2" NPT LOCKOUT VALVE, LV40A
FLOWSERVE 1.750" MECHANICAL SEAL JS M71808 9/99 / CSCEX1750ECXVB NIB