點(diǎn)擊圖片查看大圖
日常維護(hù)
PLC的日常維護(hù)和保養(yǎng)比較簡單，主要是更換保險(xiǎn)絲和鋰電池, 基本沒有其它易損元器件。由于存放用戶程序的隨機(jī)存儲(chǔ)器（RAM）、計(jì)數(shù)器和具有保持功能的輔助繼電器等均用鋰電池保護(hù)，鋰電池的壽命大約為5年，當(dāng)鋰電池的電壓逐漸降低到一定程度時(shí)，PLC基本單元上電池電壓跌落到指示燈亮，提示用戶注意有鋰電池所支持的程序還可保留一周左右，必須更換電池，這是日常維護(hù)的主要內(nèi)容。
調(diào)換鋰電池的步驟為：
■在拆裝前，應(yīng)先讓PLC通電15秒以上（這樣可使作為存儲(chǔ)器備用電源的電容器充電，在鋰電池?cái)嚅_后，該電容可對(duì)PLC做短暫供電，以保護(hù)RAM 中的信息不丟失）；
■斷開PLC的交流電源；
■打開基本單元的電池蓋板；
■取下舊電池，裝上新電池；
■蓋上電池蓋板。
注意更換電池時(shí)間要盡量短，一般不允許超過3分鐘。如果時(shí)間過長，RAM中的程序?qū)⑾А?/div>
此外,應(yīng)注意更換保險(xiǎn)絲時(shí)要采用指定型號(hào)的產(chǎn)品。
I/O模塊的更換
若需替換一個(gè)模塊，用戶應(yīng)確認(rèn)被安裝的模塊是同類型。有些I/O系統(tǒng)允許帶電更換模塊，而有些則需切斷電源。若替換后可解決問題，但在一相對(duì)較短時(shí)間后又發(fā)生故障，那么用戶應(yīng)檢查能產(chǎn)生電壓的感性負(fù)載，也許需要從外部抑制其電流尖峰。如果保險(xiǎn)絲在更換后易被燒斷，則有可能是模塊的輸出電流超限，或輸出設(shè)備被短路。
PLC的故障診斷是一個(gè)十分重要的問題，是保證PLC控制系統(tǒng)正常、可靠運(yùn)行的關(guān)鍵。本文對(duì)常用的故障診斷方法進(jìn)行了探討。在實(shí)際工作過程中，應(yīng)充分考慮到對(duì)PLC的各種不利因素，定期進(jìn)行檢查和日常維護(hù)，以保證PLC控制系統(tǒng)安全、可靠地運(yùn)行。
Allen Bradley 1746 A4, 1746 P2 1746 L532 + 3 I/O module
2W 330 ohm 5% Carbon Comp Resistors Allen Bradley MIL 4
2W 330 ohm Carbon Comp Resistors Allen Bradley MIL (4)
2W 33K ohm 5% Carbon Comp Resistors Allen Bradley (5)
2W 39 ohm 5% Carbon Comp Resistors Allen Bradley (5)
*NEW* Allen Bradley 1793-IE4 /A 1793IE4 Analog Input
60 DAYS WARRANTY! Analog Input Modules, 4 Single-Ended
Allen-Bradley Camera Switch Modules-2 Accessories!
2W 68 ohm Carbon Comp Resistors MIL Allen Bradley (4)
2W 430 ohm Carbon Comp Resistors Allen Bradley MIL (4)
ALLEN BRADLEY 1746-OW16/C MODULE
ALLEN BRADLEY ADJUSTABLE FREQUENCY AC DRIVE C#1332-YAA!
Allen Bradley Output Module 1746-OA16 Ser. A
Allen Bradley 1746-HSRV **FACTORY SEALED ++++WARRANTY
ALLEN BRADLEY 1746-NI8/A MODULE
Allen Bradley 1746-HSCE SerA High Speed Counter Encoder
Allen Bradley SLC DH+ 5/04 Terminal Connector
Allen Bradley SLC SCANport 1203-SM1 SerA
Allen Bradley 160-BA02NSF1 0.75HP AC Drive 0.75 HP
NEW IN BOX Allen Bradley 1761-L16BWA/E NIB 1761L16BWA
1745-E151/A Allen Bradley SLC 150 1745E151 G53
Allen Bradley AB 150-A24NBDB SMC MCC Bucket 30A 10 HP
SST-PFB-SLC SST fAllen Bradley Profibus SSTPFBSLC
NIB ALLEN BRADLEY 1756-L61S SER B PROCESS1756L61SNEW
1745-PCC Allen Bradley SLC 150 interface 1745PCC E-81
FS NIB ALLEN BRADLEY 1769-L30 SER A 1769L30 PROCESSOR
FACTORY SEALED Allen Bradley 1746-OB16/D MODULE
Allen Bradley 1746-HSCE SerA High Speed Counter Encoder
Allen Bradley 1746-HSCE2 Multi-Channel Hi Speed Counter
Allen Bradley Thermocouple Module 1746-NT8 Used
Allen-Bradley 702TA Size 00 Contact3 Pole Type 1 !!
Nice! A-B Allen Bradley SLC 500 1747-L30C Ser C A2
Allen Bradley 1746-HSCE SerA High Speed Counter Encoder
Allen Bradley 1747-L551 /B 1747L551 SLC 5/05 Controller
Allen Bradley 1747-L551 /B 1747L551 SLC 5/05 Controller
Allen Bradley 1747-L551 /B 1747L551 SLC 5/05 Controller
Allen Bradley 1747-L551 /B 1747L551 SLC 5/05 Controller
ALLEN BRADLEY 1746-IB16 C INPUT PLC MODULE
1747L551 SLC 5/05 Controller
Allen Bradley 1747-L551 /B 1747L551 SLC 5/05 Controller
Allen Bradley 1747-L551 /B 1747L551 SLC 5/05 Controller
Allen Bradley 1747-L551 /B 1747L551 SLC 5/05 Controller
Allen Bradley 1747-L551 /B 1747L551 SLC 5/05 Controller
Allen Bradley 1747-L551 /B 1747L551 SLC 5/05 Controller
Allen Bradley 1747-L551 /B 1747L551 SLC 5/05 Controller
Allen Bradley 1747-L551 /B 1747L551 SLC 5/05 Controller
Allen Bradley 1747-L551 /B 1747L551 SLC 5/05 Controller
Allen Bradley 1747-L551 /B 1747L551 SLC 5/05 Controller
Allen Bradley 1747-L551 /B 1747L551 SLC 5/05 Controller
Allen Bradley 1747-L551 /B 1747L551 SLC 5/05 Controller
Allen Bradley 1747-L551 /B 1747L551 SLC 5/05 Controller
200HP ALLEN BRADLEY 3 PH. CONTACTNo. 100-B250N NEW
Allen Bradley size 3 500-DOD930 Starter AB 500-D0D930
Allen Bradley 1771-ON 1771ON Output Module(s) NIB
Allen Bradley 1771-OBD 1771OBD Output Module(s) NIB
*NEW* Allen Bradley AB 500-AOD92 /B 500AOD92 Contactor
NEMA Contactor,MotLoads,Top Wiring,SIZE 0,115-120V
New In Box ALLEN BRADLEY 1746-IV32 Ser C 1746-1V32
Allen-Bradley 1746-IG16 1746IG16 ser C NeW iN BoX
Allen Bradley 2711-NC1 Upload Download Cable NIB NEW *
NEW ALLEN BRADLEY ADJUSTABLE FREQ AC DRIVE 1333-YAA B
RARE! Allen Bradley Medar SLC 500 Weld Control Module
*NEW SEALED* Allen Bradley AB 2711-T10C15 /D PView 1000
60 Days Warranty! PanelView 1000 Color, ControlNet
Allen Bradley Size Sz 1 3 A Amp MCP Breaker MCC Bucket
Allen Bradley Size Sz 1 3 Amp HMCP Breaker MCC Bucket
*NEW* Allen Bradley AB 2711-B5A16 /H PanelView 550 Mono
60 DAYS WARRANTY! PanelView 550 Mono, DF1 & RS-232 Prtr
RARE! Allen Bradley Medar SLC 500 Weld Control Module
Part Number 917-0043 Check My Other Listings FMore
*NEW* Allen Bradley AB 2711-T10G16L1 /E PanelView 1000
1 NEW ALLEN-BRADLEY 194R-HS1 BLACK OPERATING HANDLE NIB
免責(zé)聲明：（1）以上所展示的信息由企業(yè)自行提供，內(nèi)容的真實(shí)性、準(zhǔn)確性和合法性由發(fā)布企業(yè)負(fù)責(zé)，環(huán)球塑化網(wǎng)對(duì)此不承擔(dān)任何保證責(zé)任。我們?cè)瓌t上建議您優(yōu)先選擇“塑企通”會(huì)員合作! （2）同時(shí)我們鄭重提醒各位買/賣家，交易前請(qǐng)?jiān)敿?xì)核實(shí)對(duì)方身份，切勿隨意打款或發(fā)貨，謹(jǐn)防上當(dāng)受騙。如發(fā)現(xiàn)虛假信息，請(qǐng)向環(huán)球塑化網(wǎng)舉報(bào)。
簡繁切換