- 操作員站采用HP-UNIX工作站,并通過實(shí)時(shí)加速器板連接到MasterBus300的冗余接口,通過它操作人員可直接
- 對(duì)現(xiàn)場(chǎng)設(shè)備進(jìn)行監(jiān)控,主要功能有1)軋鋼生產(chǎn)設(shè)備的啟停(2)設(shè)備數(shù)據(jù)設(shè)定和實(shí)時(shí)監(jiān)控(3)事件與報(bào)警清單的顯示與打印等。系統(tǒng)的主要畫面有啟動(dòng)畫面、設(shè)定畫面、維護(hù)畫面、事件畫面和報(bào)警畫面。
-
油田
SCADA系統(tǒng)配置圖
(一)、CPU的雙機(jī)、雙電源和雙機(jī)架的冗余:
ControlLogix 的硬件直接支持CPU的雙機(jī)冗余,而不用像以前那樣還需要用戶編程實(shí)現(xiàn)冗余切換。這樣,用戶只需要安裝好硬件和連線,然后用軟件簡(jiǎn)單組態(tài)一下,就可以實(shí)現(xiàn) CPU的冗余熱備。如右圖所示,兩個(gè)CPU分別放在機(jī)架A和機(jī)架B里面,同時(shí)掛在ControlNet網(wǎng)上,兩塊冗余模板間通過光纜連接。這樣,在兩塊 CPU同步后,主CPU和備CPU之間通過冗余模板進(jìn)行數(shù)據(jù)和程序的同步。當(dāng)主CPU出現(xiàn)故障時(shí),對(duì)現(xiàn)場(chǎng)的控制自動(dòng)轉(zhuǎn)到備用CPU,同時(shí)備CPU轉(zhuǎn)為主 CPU。故障CPU則可以停電檢修,而不會(huì)影響對(duì)現(xiàn)場(chǎng)設(shè)備的控制,檢修完成后,更可以自動(dòng)實(shí)現(xiàn)與當(dāng)前主CPU的程序和數(shù)據(jù)的同步,大大提高了系統(tǒng)的可靠 性。經(jīng)過時(shí)間的檢驗(yàn),澀寧蘭工程SCADA系統(tǒng)的CPU冗余已經(jīng)非常成功的得以使用。
(二)、利用通訊模板實(shí)現(xiàn)與其它設(shè)備的通訊:
澀寧蘭全線的計(jì)量使用從在站從氣田集氣站色譜分析儀采集的氣體組分?jǐn)?shù)據(jù)來提高計(jì)量精度。同時(shí)計(jì)量結(jié)果還要讀入到CPU 中,這樣就涉及到ControlLogix系統(tǒng)與其他設(shè)備通訊的問題。在澀北站,CPU到氣田集氣站色譜分析儀的距離超過了100多米,我們采用RS- 485連線解決距離問題,利用通訊模板的一個(gè)應(yīng)用口與氣田的流量計(jì)算機(jī)通訊,采集氣體組分和流量計(jì)量結(jié)果。其余三個(gè)站的計(jì)量是通過CPU同流量計(jì)算機(jī)間的 通訊實(shí)現(xiàn),CPU將從中心得到的氣田的組分?jǐn)?shù)據(jù)寫入到流量計(jì)算機(jī)中,流量計(jì)算機(jī)利用這些數(shù)據(jù)計(jì)算出流量,然后將結(jié)果送到CPU中。因?yàn)槊恳粋€(gè)站都有幾路計(jì) 量回路,所以CPU要循環(huán)采集各個(gè)流量計(jì)算機(jī)的值。我們把通訊模板的應(yīng)用口與流量計(jì)算機(jī)的通訊口連接成RS-485網(wǎng),使用MODBUS協(xié)議進(jìn)行通訊。通 訊模板循環(huán)采集流量計(jì)算機(jī)的數(shù)據(jù)并通過高性能的、無源多主線背板將數(shù)據(jù)送到CPU中。見下圖:
(三)、PID控制:
在澀北站設(shè)置一臺(tái)壓力調(diào)節(jié)閥,起著根據(jù)全線輸量的大小,調(diào)節(jié)整條管道壓力的重要作用。我們?cè)赑LC程序中利用 RSLogix 5000編程軟件所提供的PID指令,并結(jié)合多年的工程作經(jīng)驗(yàn)成功的實(shí)現(xiàn)了對(duì)調(diào)節(jié)閥的控制。與其他軟件PID指令相比,RSLogix 5000提供的PID指令,可以自動(dòng)實(shí)現(xiàn)手/自動(dòng)切換,并可以設(shè)置調(diào)節(jié)死區(qū)和模板通道出現(xiàn)錯(cuò)誤時(shí)的預(yù)給定值等,開發(fā)時(shí)可以給用戶帶來很大的便利。在我們現(xiàn) 場(chǎng)調(diào)試后,調(diào)節(jié)閥可以很好的發(fā)揮調(diào)節(jié)全線輸量的作用。
(四)、遠(yuǎn)程系統(tǒng)維護(hù):
在 中心和各站場(chǎng)分別設(shè)路由器,中心和站場(chǎng)通過路由器和衛(wèi)星進(jìn)行通訊。這樣不僅可以在中心采集各個(gè)站的數(shù)據(jù)和實(shí)現(xiàn)控制功能,也可以利用RSLogix 5000編程軟件和非常好用的RockWell RSLinx通訊軟件上載或下載各個(gè)站CPU中的程序。這就是說,工程師在控制中心就可以進(jìn)行全線系統(tǒng)的一些維護(hù)。
(五)、工程中的所有模板支持帶電熱插拔:
在工程中應(yīng)用的所有模板都支持帶電插拔,保證在運(yùn)行中對(duì)某一塊模板進(jìn)行維護(hù)時(shí)不會(huì)影響到系統(tǒng)其他的部分。這給系統(tǒng)的調(diào)試和系統(tǒng)的維護(hù)帶來很大的便利。
目前,工程均已經(jīng)正常運(yùn)行兩年 以上,總體來說ControlLogix系統(tǒng)在這兩個(gè)重大工程中的應(yīng)用是非常成功的。除了上述一些特性的應(yīng)用,Logix 處理器和各種模板都可以提供豐富的自診斷信息,使得系統(tǒng)對(duì)于硬件的錯(cuò)誤可以有更靈活、更快速的應(yīng)對(duì)手段,來提高系統(tǒng)對(duì)意外事件的處理能力,進(jìn)一步來提高系 統(tǒng)的智能程度。靈活、簡(jiǎn)單的可擴(kuò)展性,更可以滿足日后的系統(tǒng)擴(kuò)容,而不必為擴(kuò)容時(shí)舊系統(tǒng)的去留大傷腦筋。
2 PLC診斷軋鋼生產(chǎn)設(shè)備故障的基本原理
軋鋼設(shè)備的故障信號(hào)有數(shù)字量和模擬量之分,PLC采用不同的方法對(duì)這兩種信號(hào)對(duì)應(yīng)的故障進(jìn)行診斷。
2.1基于數(shù)字量信號(hào)的故障診斷
PLC對(duì)數(shù)字量信號(hào)的識(shí)別是通過其數(shù)字量輸入模塊完成的。PLC控制軋鋼生產(chǎn)設(shè)備時(shí),設(shè)備中的壓力、溫度、液位、行程數(shù)字及操作按鈕等數(shù)字量傳感器與PLC的輸入端子相連,每個(gè)輸入端子在PLC的數(shù)據(jù)區(qū)中分配有一個(gè)“位”,每個(gè)“位”在內(nèi)存中為一個(gè)地址。讀取PLC輸入位的狀態(tài)值可作為識(shí)別數(shù)字量故障信號(hào)的根據(jù)。診斷數(shù)字量故障的過程,實(shí)質(zhì)就是將PLC正常的輸入位狀態(tài)值與相應(yīng)的輸入位的實(shí)際狀態(tài)值相比較的過程。如果二者比較的結(jié)果是一致的,則表明設(shè)備處于正常工況,不一致則表明對(duì)應(yīng)輸入位的設(shè)備部位處于故障工況。這就是PLC診斷基于數(shù)字量信號(hào)故障的基本原理。這種診斷方法,故障定位準(zhǔn)確,可進(jìn)行實(shí)時(shí)在線診斷。通過PLC的圖形功能塊編程,還可將故障診斷融入過程控制,達(dá)到保護(hù)軋鋼設(shè)備的目的。
2.2基于模擬量信號(hào)的故障診斷
PLC對(duì)模擬量信號(hào)的識(shí)別是通過PLC的模擬量輸入輸出模塊來完成的。模擬量輸入輸出模塊采用A/D轉(zhuǎn)換原理,輸入端接收來自傳感器或變送器的模擬信號(hào),輸出端輸出的模擬信號(hào)作用于PLC的控制對(duì)象。PLC診斷模擬量故障的過程,實(shí)質(zhì)就是將在相應(yīng)A/D通道讀到的監(jiān)測(cè)信號(hào)的模擬量的實(shí)際值與系統(tǒng)允許的極限值相比較的過程。如果比較的結(jié)果是實(shí)際值遠(yuǎn)離極限值,則表明軋鋼生產(chǎn)設(shè)備對(duì)應(yīng)的受監(jiān)控部位處于正常狀態(tài),如果實(shí)際值接近或達(dá)到極限值,則為不正常狀態(tài)。判斷故障發(fā)生與否的極限值根據(jù)實(shí)際系統(tǒng)相應(yīng)的參數(shù)變化范圍確定,利用PLC上的模擬量設(shè)定開關(guān)可精確設(shè)置該極限值。
當(dāng)模擬量的實(shí)際值達(dá)到模擬量設(shè)定開關(guān)的設(shè)定值,PLC還能按照一定的邏輯關(guān)系啟動(dòng)開關(guān)量模塊上的輸出位,或者從PLC的通訊口主動(dòng)發(fā)起通訊,從而輸出故障診斷的結(jié)果,并據(jù)此實(shí)現(xiàn)對(duì)軋鋼生產(chǎn)設(shè)備的控制。
2.3基于中斷方式的故障診斷
PLC的中斷方式有:
(1)輸入中斷;
(2)間隔定時(shí)器中斷;
(3)高速計(jì)數(shù)器中斷。其中,輸入中斷特別適合于軋鋼生產(chǎn)設(shè)備的故障診斷。它對(duì)應(yīng)于工業(yè)操作站的硬中斷,屬于外部中斷,但PLC的輸入中斷可用PLC的外部指令來屏蔽。將軋鋼生產(chǎn)設(shè)備的故障信號(hào)作為PLC的輸入中斷源,一旦出現(xiàn)故障信號(hào),CPU立即響應(yīng),停止正在執(zhí)行的程序,轉(zhuǎn)到中斷子程序中去,即可方便地對(duì)故障進(jìn)行處理。它與直接利用PLC的內(nèi)部邏輯完成故障診斷的不同之處在于:采用輸入中斷處理故障時(shí),可停止PLC主程序的執(zhí)行過程,而直接利用PLC的輸入和內(nèi)部邏輯處理故障時(shí),PLC的主程序仍處于運(yùn)行狀態(tài)。因此,要根據(jù)故障對(duì)軋鋼生產(chǎn)設(shè)備的影響程度選擇合適的故障診斷方式。PLC的輸入中斷方式對(duì)后果嚴(yán)重的突發(fā)故障的處理特別有用。3PLC在故障診斷系統(tǒng)中的作用
故障診斷系統(tǒng)是典型的人機(jī)系統(tǒng),根據(jù)系統(tǒng)中的信息流向和功能劃分的結(jié)果[1],基于操作站智能化的故障診斷系統(tǒng),如圖2所示。
系統(tǒng)的輸入模塊要完成軋鋼生產(chǎn)設(shè)備故障檢測(cè)信號(hào)、控制指令和專家知識(shí)的接收工作。處理模塊要求能自動(dòng)實(shí)現(xiàn)特征參數(shù)提取、控制指令代碼轉(zhuǎn)換的功能。專家知識(shí)的整理和表達(dá)由領(lǐng)域?qū)<液拖到y(tǒng)專家協(xié)作完成。控制模塊是故障診斷系統(tǒng)的核心,它根據(jù)控制指令,利用專家知識(shí),完成從故障特征到故障原因的識(shí)別工作??刂颇K的功能越完善,故障診斷系統(tǒng)的智能化程度越高。輸出模塊通過聲光報(bào)警裝置和人機(jī)界面,給出故障定位、預(yù)報(bào)和解釋的結(jié)果。其中,人機(jī)界面還能提供排除故障的技術(shù)路線。實(shí)現(xiàn)信息源從輸入模塊到輸出模塊的全自動(dòng)流向,減少人在其中的干預(yù)作用,是軋鋼生產(chǎn)設(shè)備對(duì)其故障診斷系統(tǒng)的要求。采用PLC的故障診斷系統(tǒng),有助于實(shí)現(xiàn)故障診斷過程的自動(dòng)化。
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FANUC CIRCUIT BOARD PCB A16B-1200-0410/?04B
GE FANUC ROBOTICS 5T/2000 AC SERVO MOTOR A06B-0382-B102#?7000
FANUC CIRCUIT BOARD PCB A16B-1211-0170/?11E
FANUC TERMINAL UNIT A05B-2350-C080
FANUC ROBOTICS PCB DAUGHTER BOARD A20B-2901-0480/?01A
FANUC ROBOTICS EO-3410-060-000 P-10 INNER ARM ASSEMBLY, NNB
FANUC ROBOTICS 4 AXES CONTROL PCB A16B-2200-0250 *NEW*
FANUC SERIES 16i, 18i, 21i, ETC... - MODEL A CONNECTION MANUAL GFZ-63003EN/02
FANUC CIRCUIT BOARD PCB A16B-1200-0410/?05C
FANUC CIRCUIT BOARD PCB A16B-1210-0020/?09E
FANUC CIRCUIT BOARD PCB A16B-1210-0210/?02B
FANUC CIRCUIT BOARD PCB A16B-1210-0200/?02B
FANUC MECHANICAL UNIT PARTS MANUAL MARP3AMM609801E REV B
FANUC ROBOTICS POWER SUPPLY A05B-2440-C470
FANUC TOSHIBA TRANSISTOR MG30G1BL2 *LOT OF 3*
FANUC PCBDO000000005O CARD, NNB
TAMURASEISAKUSH?O FANUC TRANSFORMER A80L-0001-0276
GE FANUC 16 BIT 4 CHANNEL ANALOG INPUT MODULE IC200ALG620-FD
FANUC ROBOTICS BETA SERIES B1/3000 0.3KW AC SERVO MOTOR A06B-0031-B175#?0008
FANUC E-STOP PCB CONTROL BOARD A16B-1212-0930/?06B
FANUC ETHERNET CIRCUIT BOARD PCB A16B-2200-0821/?04B
FANUC ROBOTICS AXIS CONTROL BOARD PCB A16B-1212-0090/?03A
FANUC ROBOTICS CRT MDI CONTROL BOARD A20B-2000-0840/?06B
FANUC ROBOTICS ALPHA SERIES a6/2000 AC SERVO MOTOR A06B-0127-B177#?7000 *NO CAP*
FANUC ROBOTICS CABLE ASSEMBLY A660-2001-U450
GE FANUC 12/24VDC .5A 8PT NEG LOGIC OUTPUT MODULE IC693MDL733C
FANUC ROBOTICS AXIS CONTROL PCB BOARD A16B-2200-0853/?03B *NEW*
FANUC ROBOTICS MAIN CPU BOARD A16B-2200-0841/?07E W/ DAUGHTER BOARDS
FANUC EE-0989-120-006 REV C CABLE, NNB
FANUC A660-4003-T241 SYSTEM RJ3 K102 J56 AXES PULCO CABLE, NEW
FANUC ROBOTICS MD1/CRT UNIT OPERATOR INTERFACE A02B-0051-C012
FANUC ROBOTICS CABLE CONNECTION UNIT 231B-1119-T003/?L1R003
FANUC ROBOTICS CABLE ASSEMBLY A660-2003-T216 / L2R503C
FANUC A06B-0128-B175 a6 / 3000 AC SERVO MOTOR *DAMAGED
GE FANUC 24VDC 16 POINT INPUT MODULE IC200MDL940F
FANUC 12/24VDC, 0.5A OUTPUT MODULE AOD16D A03B-0807-C154#?D
FANUC 5V MANUAL PULSE GENERATOR A860-0203-T001
FANUC SERIES 16,18,160,AND 180 MODEL B MAINTENANCE MANUAL GFZ-62445E/03
GE FANUC ROBOTICS 30P AC SPINDLE MOTOR A06B-0730-B200#?3000 *DAMAGED*
GE FANUC OPTION 2 CIRCUIT BOARD PCB A16B-2202-0850 *DAUGHTER BOARDS*
FANUC 230VAC 8 POINT OUTPUT MODULE A03B-0807-C158#?D
FANUC ROBOTICS DEVICENET INTERFACE BOARD PCB A16B-2203-0190/?03A
FANUC MODULE PSM 45 AND SPM-45 DEscripIONS MANUAL GFK-1367
FANUC ROBOTICS 22/26KW MODEL a22 AC SPINDLE MOTOR A06B-0859-B200#?3000 *PLASTIC*
FANUC ETHERNET REMOTE PCB A16B-2201-0891/?03A
FANUC A20B-1002-0980 / 03B CONTROL CARD, NEW
FANUC A97L-60A-57 XGMF-08733 RV REDUCER, NIB
FANUC 10S AC SERVO MOTOR A06B-0315-B205 *NEW*
FANUC ROBOTICS EMERGENCY STOP CONTROL UNIT A05B-2452-C471
FANUC SERIES 15 & 150 FOR LATHE OPERATORS MANUAL GFZ-61214E/05
FANUC ROBOTICS 5S/3000 AC SERVO MOTOR A06B-0514-B505/?7076-R
FANUC ROBOTICS 24VDC INPUT MODULE AID16D A03B-0807-C104 *MISSING DOOR*
FANUC SERIES 16i/18i/21i/20i?-MODEL A MAINTENANCE MANUAL (VOL.1& 2) GFZ-63005EN02
FANUC CIRCUIT BOARD PCB A16B-1210-0290/?02A
FANUC ROBOTICS MULTIPLEXER PCB A20B-2001-0042/?03A *NEW*
FANUC SERIES 15-MODEL B PARAMETER MANUAL GFZ-62560E/01 *NEW, UNBOUND*
FANUC EE-0989-211-001 FEMALE CABLE ASSEMBLY, NNB
FANUC CARD A16B-2200-0450/?03B W/ A16B-1600-0400/?01A
FANUC ROBOTICS BRAKE AMPLIFIER INTERFACE PCB BOARD A16B-1212-0910/?01A
FANUC SERIES 16, 18, 160, 180-MODEL C MAINTENANCE MANUAL B-62755EN/01
FANUC SERIES 16i/18i/21i/20i?/160i/180i/210i CONNECTION MANUAL GFZ-63003EN/04
FANUC 24VDC, 0.25A OUTPUT MODULE OD64A A03B-0801-C141
FANUC SERIES 15-MODEL B FOR MACHINING CENTER PROGRAMMING MANUAL GFZ-62564E/01
FANUC ROBOTICS BRAKE RELEASECABLE W/ HARTING M1 CONNECTOR EE-3285-420-001 *NEW*
FANUC ROBOTICS MODEL D POWER MATE A02B-0166-B001 *PLASTIC*
FUJI FANUC SINGLE POLE 20A CIRCUIT PROTECTOR CP31
FANUC LTD ROBOT TEACH PENDANT CONTROL BOARD PCB A20B-2000-0591/?01A
FANUC ROBOTICS SERVO AMPLIFIER A06B-6058-H007
FANUC DE-3246-970-189 CABLE ASSEMBLY, 42 PIN FEMALE, NEW
FANUC EE-0989-120-001 CABLE ASSEMBLY, NEW
FANUC NE-4814-973-001 CABLE ASSEMBLY, NEW
FANUC EE 3287 112 135 SERVO MOTOR CABLE, 12 PIN,
FANUC ROBOTICS MEMORY DAUGHTER BOARD A20B-2901-0050/?01A
FANUC ROBOTICS ACCUFLOW COUNTER UNIT EE-1063-002
YAMATAKE / HONEYWELL / FANUC A05B-1205-D005 CABLE ASSEMBLY, NEW
FANUC ROBOTICS 120VAC 2A OUTPUT MODULE OA08D A03B-0801-C116
FANUC CIRCUIT BOARD PCB A16B-1210-0300/?02A
FANUC ROBOTICS TEACH PENDANT CONTROL BOARD A20B-1002-0980/?03B
FANUC ROBOTICS PMI MEZZANINE CARD PMC-NB BOARD PCB A16B-2201-0811/?03A
FANUC S-500 R MODEL J CONTROLLER CONNECTION AND MAINTENANCE MANUAL MARAMS50006..
FANUC ROBOTICS TRANSISTOR MODULE MDB30C6
FANUC ROBOTICS Interbus-S REMOTE I/O MODULE IBS100 HE693IBS100E
FANUC ROBOTICS 12/24VDC OUTPUT MODULE IC693MDL742G
FANUC ROBOTICS ETHERNET BOARD A20B-8001-0120/?04B
FANUC ROBOTICS OPERATOR PANEL BOARD A16B-1213-0030/?02A
FANUC GMF ROBOTICS ANALOG OUTPUT MODULE A03B-0801-C411
FANUC A06B-0346-B357 5F/3000 AC SERVO MOTOR, NIB
FANUC ROBOTICS 10S AC SERVO MOTOR A06B-0315-B074-?R
FANUC SERIES 16 & 150 MODEL B OPERATORS MANUAL (PROGRAMMING) GFZ-62564E/02
FANUC ROBOTICS OPTO ISO PC BOARD A20B-1000-0661/?01A
FANUC ROBOTICS EMERGENCY BRAKE CONTROL PCB BOARD A16B-1212-0540/?06D *NEW*
FANUC AC SPINDLE MOTOR A SERIES PARAMETER MANUAL GFZ-65160E/01 *NEW, UNBOUND*
FANUC ALPHA SERIES a8/8000 AC SPINDLE MOTOR A06B-0855-B190#?3000 *NEW*
FANUC ROBOTICS ACCUFLOW COUNTER INPUT EE-1063-001 *LOT OF 3*
FANUC RELAY OUTPUT MODULE AOR08G A03B-0819-C160#?D *NO WIRING TERMINAL*
FANUC ROBOTICS PC I/F CONNECT UNIT A02B-0236-C268
FANUC ROBOTICS TERMINAL I/O BASIC MODULE A03B-0823-C001
FANUC FAN ASSEMBLY WITHOUT WIRES A05B-2301-C902
FANUC ROBOTICS 7m CONTROL CABLE A06B-6078-K816 *NEW*
FANUC ROBOTICS DUAL CHANNEL PCIM CARD IC660ELB922J 44A736290-002R0?9
FANUC SERIES 16,18,160,180-M?C OPERATORS MANUAL B-62764EN/01
FANUC ROBOTICS 30F/2500 AC SERVO MOTOR A06B-0358-B756 *BENT PLUG*
FANUC ROBOTICS 30S/3000 AC SERVO MOTOR A06B-0319-B074#?7000
FANUC ROBOTICS AXIS CONTROL PCB BOARD A16B-2200-0853/?02B W/ DAUGHTER BOARDS
FANUC SERIES 15 & 150 MODEL B OPERATORS MANUAL (OPERATION) GFZ-62564E-1/02
A660-2005-T544 RP1 STANDARD B-CABLE, 14 M, 46 Pin MALE/FEMALE, NEW
FANUC ROBOTICS INPUT MODULE AAD04A A03B-0807-C051 *MISSING DOOR*
FANUC ROBOTICS AC SPINDLE MOTOR A06B-????-???? *MISSING LABEL*
FANUC R-J LINE TRACKING SOFTWARE SETUP AND OPERATIONS MANUAL MAROGLINE11301E
FANUC SYSTEM R-J CONTROLLER PARTS MANUAL MARPGERJC06202E (B-67996E/01)
FANUC CBLEO009000172O TEC-CAB-40FM-12?5FT CABLE, NNB
FANUC ROBOTICS INTERNAL CABLES FOR DETACH RCC A05B-2351-H261
FANUC EE-0989-323-001 REV A CABLE ASSEMBLY, NNB
FANUC EE 0833 119 008 INTERLOCK CABLE ASSEMBLY, 48 M, 9 PIN FEMALE
FANUC A660-8014-T642 46 PIN MALE, 4 PIN FEMALE, 3 PIN FEMALE, CABLE, NEW
FANUC DE-2044-901 CABLE ASSEMBLY, 19 Pin FEMALE, NEW
FANUC EE 0989 110 006 ROBOT CABLE 4 PIN FEMALE