一、1C31132G01運行環(huán)境的保證
因為PLC為精密電子產(chǎn)品，自動化控制的系統(tǒng)是要求長時間不間斷運行，因此PLC的運行環(huán)境要求極高，要防塵、防火、防水，防高溫，防雷電，因此電氣控制室一般都安排在具有雙層玻璃的、安裝有水式制冷空調(diào)的二樓，電控室的溫度一般控制在28度左右;對于防塵則是將PLC安裝在1M＊2.2M＊0.6M的帶鎖前面板為玻璃門的控制柜中，此柜上部安裝有防塵罩的抽風(fēng)系統(tǒng)進行柜內(nèi)降溫。
二、做好日常工作
1、日常準(zhǔn)備工作：首要的熟悉工藝流程，其次是對PLC各種模塊的說明資料的熟悉，再次現(xiàn)場布局的了解，最后確保自已的各種檢測工具要完好無誤。
2、日常點檢工作：定期進行CPU的電池的電壓檢測，正常常情況下為3V，定期對構(gòu)成PLC系統(tǒng)的相關(guān)設(shè)備的點檢和維護，如UPS定期維護，利用停機時機，對PLC各控制柜進行人工除塵、降溫，PLC程序的定期人工備份和電池備份及各相關(guān)壞器件的更換等工作。
三、PLC故障的診斷
?。ㄒ唬┛偡▌t：
對于PLC系統(tǒng)的故障檢測法：一摸、二看、三聞、四聽、五按跡尋蹤法、六替換法。
一摸，查CPU的溫度高不高，CPU正常運行溫度不超過60℃，因手能接受的溫度為人體溫度37～38℃，手感為宜;二看，看各板上的各模塊指示燈是否正常;三聞，聞有沒有異味，電子元件或線纜有無燒毀;四聽，聽有無異動，鏍絲釘松動、繼電器正常工作與否，聽現(xiàn)場工作人員的反映情況;五出現(xiàn)故障根據(jù)圖紙和工藝流程來尋找故障所在地;六對不確定的部位進行部件替換法來確定故障。
（二）具體步驟：
1C31132G01當(dāng)PLC的軟件不正常時，主要看CPU的RUN狀態(tài)是否正常，不正常則進行CPU清除后重新下載控制程序。
當(dāng)PLC硬件不正常時則要按以下順序進行檢查工作：
1、查看PLC電源是否有電：有電則測量電壓是否在+24V的±5%范圍之內(nèi)，有電且正常，則進行下一步;有電不正常則進行電源模塊的輸出端與輸入端進行檢測，若輸出端不正常而輸入端正常，則更換模塊;若輸入端不正常，則進行輸入端的逆流法則進行相應(yīng)檢查，如進行24V交直流變壓器的輸入電壓端的交流電壓220V的±10%檢查，正常，則更換直流24V變壓器。無電則按跡尋蹤，借助原理圖+現(xiàn)場布置總圖+接線圖紙，檢查給電源模塊供電的各種電器器件的輸出端的接線是否正確，不正確，重新接線;正確用萬用表則檢查空氣開關(guān)的進線端與出線端有無正常供電，無正常供電，查明是外界還是自身原因，若為外界則是電壓不足還是根本無電壓，或負載過重，又或嚴(yán)重過流等等的分析，一直到將事故排除正常供電為止;若為本身器件壞則更換之。
2、了解過CPU工作模式及優(yōu)先級：高優(yōu)先級有STOP、HOLDUP、STARTUP（WARMRESTART、COLDRESTART）;低優(yōu)先級有：RUN、RUN-P（PG/PC的在線讀寫程序）。查看CPU是在RUN模式，或是在STOP模式，又或是RUN模式的閃爍狀態(tài)和STOP模式兼有的保持模式或叫調(diào)試模式。如果僅是RUN模式則CPU和各板為正常進行第3步。如果是保持模式出現(xiàn)，可能是運行過程中用戶程序出現(xiàn)斷點而處于調(diào)試程序狀態(tài)，或在啟動模式下斷點出現(xiàn)，對此情況重新調(diào)試好程序，再次將控制程序下載到CPU中方可。
1C31132G01如果是STOP模式，目測引起STOP的原因分析：A、無電，分析無電原因，是因為供電部門出問題，還是異常掉電（因有有1K3AH的UPS保證很少發(fā)生異常掉情況），通常情況下為檢修拉電了，待檢修結(jié)束后進行人工送電。再利用PLC的在線功能將CPU的工作模式從STOP轉(zhuǎn)換為RUN;B、CPU壞，更換新的好的同種類型同版本的CPU;C、有板子壞了，有序進行板子的更換。對于硬件更換時要注意使用與原來的器件相同的產(chǎn)品同型號、同版本來進行，否則會造成實際的PLC配置與相應(yīng)編程軟件中硬件配置數(shù)據(jù)庫中硬件配置不同而無法進行用戶控制程序的正常循環(huán)執(zhí)行。
3、1C31132G01進行各個主板和擴展板上的通迅電纜檢查和各模塊各LED燈的檢察，看是否有壞模塊出現(xiàn)fault燈亮，若有則該模塊不正常。對于數(shù)字量輸出模塊上各點其實與現(xiàn)實生活上的電燈開關(guān)是一樣的功能且為常開點，所以在線檢修該模塊的任一點時，只要在無接線時且該地址在控制程序不給輸出信號時來檢測其通不通就可以了，若通，則該點不正常，不通則正常;不正常時要進行硬件連接線的另選點重接工作;另外我們也可以用新模塊進行更換后，對替換下來的模塊的點進行測量通斷狀態(tài)，通，則該點壞，不通該點為好。對于數(shù)字量輸入模塊的點當(dāng)于導(dǎo)通的線圈，為常閉狀態(tài)，它可以在線或下線檢測，用表檢測若是壞點的話則是不通的狀態(tài)，則換點重接線;好點則為通狀態(tài)。只要對硬件接線重新?lián)Q點重接后均要用相應(yīng)編程軟件對控制軟件進行0X或1X地址替換工作。對于模擬量輸入模塊是與數(shù)字量輸入模塊相同，每個通道都相當(dāng)于一根導(dǎo)線形式，也就是說相當(dāng)于常閉點，所以檢測通道好壞的方法為用表的測通斷功能來檢測，當(dāng)通狀態(tài)時為好，斷狀態(tài)時為壞通道;模擬量輸出模塊的檢測方法與數(shù)字量輸出模塊相同。若壞通道則對硬件接線需要更換通道與并同時替換控制程序中的相應(yīng)3X或4X地址;另外對于模擬量模塊則要進行量程塊的選擇的檢查，保險絲是否斷開的檢查等工作。軟件配置是否正常，一般為電壓1～5V或電流4～20mA，這根據(jù)所用的傳感器與智能轉(zhuǎn)換器類型來選擇。進行過硬件點或通道更換工作后條件允許的話均要STOP PLC的CPU，再重新下載程序，若條件不允許則直接用更新變化來下載變化的程序而不停CPU。對于不用的輸入模塊的好通道/好點與最后一個已用的一好通道/好點進行串聯(lián)或在軟件中進行特別設(shè)置。
4、對大量輸出模塊的板子上的電源模塊在正常生產(chǎn)狀態(tài)時是不能斷電的，因為此時斷電的話，將使繼電器柜中的常開繼電器變?yōu)槌ｉ_狀態(tài)，容易發(fā)生錯誤，因此要對此類的輸出模塊進行檢測時，要與現(xiàn)場操作人員進行聯(lián)系，進行該部分相關(guān)設(shè)備進行手動操作后，再撤去數(shù)字量輸出模塊的供電線后對模塊測點工作。
5、各類開關(guān)類的檢測工作：如繼電器、接近開關(guān)、空氣開關(guān)等器件的檢測工作，是根據(jù)開關(guān)的類型是常閉型還是常開型來區(qū)分，用表來檢測其通與不通的狀態(tài)，其狀態(tài)與好器件狀態(tài)相反，則該器件壞了，更換之。對于電路大部情況利用常開型，它們是用來人工控制或自動控制電流的接通與斷開的;對于常閉型主要用在保護電路中。借此可以知道開關(guān)類和保護類器件的正常狀態(tài)為如何而正常識別器件的好壞。
6、1C31132G01通迅模塊的檢測則是利用簡單的用好的新的通迅模塊進替換來識別板上的正在使用的模塊是否正常。
7、導(dǎo)線的測量方法：導(dǎo)線也是通過檢測通斷方法進行的?？梢岳靡阎ǖ膶?dǎo)線來檢測不知是否好壞的導(dǎo)線，方法是將好的導(dǎo)線與未知導(dǎo)線連接起來后測通斷狀態(tài)。
8、電阻檢測：帶電狀態(tài)時檢測電壓，不帶電時檢測相應(yīng)的電阻。
四、總結(jié)
1C31132G01通過以檢測可以排除工作中的大部分故障，另外由于本工作涉及到交流單相電220V與直流電24V的交叉作業(yè)，工作時要注意積累安全用電知識與常識，以及在工作時的安全防范措施和煤氣安全規(guī)程，以確保安全作業(yè)。
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WESTINGHOUSE 1956071A USPP 1956071A
Details about SMC CKP1A50-150Y-P74-376-X738 USPP CKP1A50150YP7437
Details about HASTINGS FILTERS AF417 NSFP AF417
Details about REXROTH R432016663 USPP R432016663
Details about NEW BENTLY NEVADA 330850-90-05 3300 XL 22mm PROXIMITOR SENSOR works w/ all 25mm
Details about HASTINGS FILTERS LF340 NSFP LF340
Details about SMC Rodless cylinder demonstration teaching board MYC25G-300L - E73AL Ex Tafe
Details about FURNAS ELECTRIC CO 75AF42 NSFP 75AF42
Details about WIX FILTERS 557085 NSFP 557085
Details about Pro-Face Proface Digital GP377-LG41-24V 2880011-02 Touch Screen HMI
Details about KSB Laufring Impeller Wear Ring Part No 001170677 503.02 Set of 3
Omron C200H-MD501 Input / Output Unit C200HMD501
Details about GTT ELECTRONICS 21-895-025 NSFP 21895025
Details about WEATHERHEAD 68X4X4 NSPP 68X4X4
WESTINGHOUSE MST01SL USPP MST01SL
Details about FURNAS ELECTRIC CO 3RU1916-3AA01 NSFP 3RU19163AA01
Details about ITE SIEMENS CK3B200 USPP CK3B200
Details about SQUARE D 9001-K96 USPP 9001K96
WESTINGHOUSE 315C293G01 NSFP 315C293G01
Details about RELIANCE ELECTRIC 922.67.05 NSFP 9226705
RELIANCE ELECTRIC 86466-91SC USPP 8646691SC
Details about PHOENIX CONTACT VAL-MS-500-ST NSFP VALMS500ST
Details about Tieman Hydraulic Scissor Lift Platb & Power Pack. Weg Motor Type 112M1181.
Details about PYROTRONICS S-HP NSPP SHP
WESTINGHOUSE A201K3CA-Z1 USPP A201K3CAZ1
Details about SIEMENS 6SL30000BE236DA1 NSFP 6SL30000BE236DA1
Details about RELIANCE ELECTRIC RFA-70 NSPP RFA70
Details about P&H MINING EQUIPMENT 79UI6DI USPP 79UI6DI
Mitsubishi Melsec Fw-0 MT PLC Base Controller NIB
SICK OPTIC ELECTRONIC PS95W-24V-ENC NSFP PS95W24VENC
SICK OPTIC ELECTRONIC 2006578 FNFP 2006578
Details about DODGE 119184 NSFP 119184
WESTINGHOUSE 7883C40G01 USPP 7883C40G01
WESTINGHOUSE 227P452H01 USPP 227P452H01
Details about MICRO MOTION RFT97123PNS Mass Flow transmitter &. Sensor DS025S114P Pair 1/2"
WESTINGHOUSE 4D14803H01 USPP 4D14803H01
RELIANCE ELECTRIC 0-57408-D USPP 057408D
Details about FURNAS ELECTRIC CO 3RX8000-0BH3-21AF0 NSFP 3RX80000BH321AF0
Details about SIEMENS 6SL3201-0BE12-0AA0 NSFP 6SL32010BE120AA0
LEDEX 810-640-332 USPP 810640332
Details about SMC air valve manifold 8 x VQ4200-5W valves and EX124U-SMJ1 CC-Link interface
John Brooks / Warren Rupp 286009604 ST1-A PTFE Diaphragm ! NEW !
Alum-A-Lift, AMAT, Varian, Applied Materials Parts Cart and Parts for Lifts
Details about FURNAS ELECTRIC CO 52PA8A2K NSPP 52PA8A2K
Details about Hardness Tester Vickers Brinell WPM Leipzig 250kg set up Brinell
WESTINGHOUSE GB2020 USPP GB2020
Details about CROUSE HINDS DSA 12 ISTD Start Stop switch NIB flame proof Exe
Details about FESTO ELECTRIC DSM-25-270-P-CC USPP DSM25270PCC
Details about DODGE 2517X2-1/8KW NSFP 2517X218KW
Details about DODGE 1610X1-7/16KW USPP 1610X1716KW
