IC697CMM731RR IC697CMM731RR IC697CMM731RR IC697CMM731RR IC697CMM731RR IC697CMM731RR
PLC的維護(hù)與檢查如何做？
雖然PLC的故障率很低，由PLC構(gòu)成的控制系統(tǒng)可以長(zhǎng)期穩(wěn)定和可靠的工作，但對(duì)它進(jìn)行維護(hù)和檢查是必不可少的。一般每半年應(yīng)對(duì)PLC系統(tǒng)進(jìn)行一次周期性檢查。檢修內(nèi)容包括：
（1）供電電源。 查看PLC的供電電壓是否在標(biāo)準(zhǔn)范圍內(nèi)。交流電源工作電壓的范圍為85～264V，直流電源電壓應(yīng)為24V。
（2）環(huán)境條件。 查看控制柜內(nèi)的溫度是否在0～55℃范圍內(nèi)，相對(duì)濕度在35%-85%范圍內(nèi)，以及無粉塵、鐵屑等積塵。
（3）安裝條件。 連接電纜的連接器是否完全插入旋緊，螺釘是否松動(dòng)，各單元是否可靠固定、有無松動(dòng)。
（4）I/O端電壓。 均應(yīng)在工作要求的電壓范圍內(nèi)。
電廠化學(xué)水處理系統(tǒng)作為電廠重要的輔助車間和輔助系統(tǒng)，特別是大型火電廠利和供熱電廠的化水處理車間處理量大，工藝復(fù)雜，水質(zhì)要求高，其運(yùn)營的好壞直接關(guān)系到電廠的安全運(yùn)行及可靠性。本文以筆者負(fù)責(zé)完成的通遼盛發(fā)熱電廠化學(xué)水處理程控系統(tǒng)項(xiàng)目，分析化學(xué)水處理程控系統(tǒng)的自動(dòng)控制。
2 化學(xué)水處理系統(tǒng)工藝流程
通遼盛發(fā)熱電廠作為新建熱電廠新建4臺(tái)機(jī)組（4×135MW，分兩期完成），化學(xué)水處理系統(tǒng)由三部分組成:軟化水處理系統(tǒng)、反滲透系統(tǒng)和除鹽水系統(tǒng),系統(tǒng)工藝流程簡(jiǎn)圖
系統(tǒng)主工藝流程為：工業(yè)水→曝氣塔→曝氣水箱→升壓水泵→疊加式過濾器→陽離子交換器→除二氧化碳器→軟化水箱→堿計(jì)量泵加堿→軟化水泵升壓（軟化水，可作為廠內(nèi)生活用水）→加熱器→反滲透裝置→反滲透水箱→反滲透水泵升壓→一級(jí)混合離子交換器→二級(jí)混合離子交換器→除鹽水箱→除鹽水泵升壓→主廠房。
3 控制系統(tǒng)硬件組成
3．1 PLC控制系統(tǒng)
根據(jù)裝置工作要求，選用性價(jià)高的AB公司的Controllogix系列可編程控制器構(gòu)建冗余的控制系統(tǒng)。PLC中CPU采用兩套1756－L55 ControlLogix5555 Controller，設(shè)置1個(gè)主站（CPU模件），5個(gè)分站(IO模件)，主站CPU與分站I/O通過ControlNet網(wǎng)絡(luò)通訊, 開關(guān)量輸入、輸出模件選用32點(diǎn)，模擬量輸入模件選用16點(diǎn)，模擬量輸出選用8點(diǎn)。
福建宇創(chuàng)自動(dòng)化設(shè)備有限公司座落于美麗的海濱城市--廈門。
是一家多年專業(yè)從事大型系統(tǒng)備件（集散式控制系統(tǒng)、可編程控制器、冗余容錯(cuò)控制系統(tǒng)、機(jī)器人控制系統(tǒng)、大型伺服控制系統(tǒng)）等進(jìn)口自動(dòng)化系統(tǒng)備件、模塊銷售及系統(tǒng)集成的高新技術(shù)企業(yè)。
對(duì)各自動(dòng)化品牌產(chǎn)品有著強(qiáng)大的優(yōu)勢(shì)，公司配備專業(yè)的技術(shù)人員，旨為客戶提供更優(yōu)質(zhì)的服務(wù)。
福建宇創(chuàng)自動(dòng)化設(shè)備有限公司本著專業(yè)、誠信、合作、共贏、的經(jīng)營理念，竭誠為客戶提供更好的服務(wù)，更好的價(jià)格；歡迎來電垂詢。 Rockwel...
主營: AB，施耐德，GE ，TRICONEX，西門子，西屋，?？怂共_ ，ABB
公司聯(lián)絡(luò)人：徐工(銷售工程師)
Tel：0592-7796662
Fax：0592-6535181
Phone：18050109369
商務(wù)QQ：3250341298
本公司有大量庫存現(xiàn)貨，全新原裝，歡迎訂購，當(dāng)天可發(fā)貨?。。。。。?br />
歡迎來電咨詢，我們將會(huì)給您最優(yōu)質(zhì)的服務(wù)！
產(chǎn)品詳細(xì)信息，歡迎來電查詢！
如果您發(fā)現(xiàn)其他供貨商為相同產(chǎn)品提供更為低廉的價(jià)格，我們也愿意參照其價(jià)格向您提供進(jìn)一步的折扣。只要您誠心購買，如果還有其他任何問題，請(qǐng)隨時(shí)與我們聯(lián)系。
我們的使命是幫助你!
降低維護(hù)成本!
延長(zhǎng)壽命的新的控制系統(tǒng)!
下面是我公司的優(yōu)勢(shì)產(chǎn)品(日常用的最多的,還有不常用的未列出，但都有做的)歡迎您
的咨詢！
本公司主要優(yōu)勢(shì)產(chǎn)品：
【美國，英維思 Invensys FOXBORO I\A系統(tǒng), Triconex ESD系統(tǒng)】
【美國AB ..1756系列,1785系列,1746系列,1747系列,1771系列】
【瑞士ABB.. 機(jī)器人 DSQC系列,ABB Advant OCS,ABB Procontic PLC CPU】
【法國施耐德140莫迪康昆騰系列處理器,內(nèi)存卡,電源模塊等?！?br />
【德國西門子Siemens MOORE,S5,S7,6DD等】
【美國通用電氣GE..IC693/IC697系列】
【美國Westinghouse（西屋）：OVATION系統(tǒng)、WDPF系統(tǒng)、WEStation系統(tǒng)備件】
【德國Bosch Rexroth（博世力士樂）：Indramat，I/O模塊,PLC控制器,驅(qū)動(dòng)模
塊等。】
【美國Motorola（摩托羅拉）：MVME 162、MVME 167、MVME1772、MVME177等系列】
Alfa Laval Model NX418B-11G Decanter Centrifuge
pharmaceutical process alfa laval ultrafiltration
quatro begerow endress hauser
Alfa Laval Purifier MAPX 313
Alfa Laval Purifier FOPX 609
Alfa Laval Purifier FOPX 607
Lee kettle 200 L Pharmaceutical reactor Alfa Laval
Alfa Laval Purifier WHPX 510
Alfa Laval - Purifier-WHPX 513
MAB 205 S-24 - Alfa Laval Solid-wall Disc Separator
Alfa Laval Purifier MFPX 307
Alfa Laval Purifier MMPX 404
Alfa Laval Purifier MAPX 309
Alfa Laval Purifier MOPX 209
Alfa Laval Purifier WHPX 508
Alfa Laval Purifier WHPX 507
Alfa Laval Purifier MAPX 210
ALFA LAVAL HEAT EXCHANGER A15-BFL 992.61 SQ FT
ALFA LAVAL A15 BFL - 993.61 SQ FEET
ALFA LAVAL FLEX AMERICAN HEAT PLATE EXCHANGER A-15 - 719 sq feet
Alfa Laval Purifier MAPX 207
Alfa Laval Purifier MOPX 207
Alfa Laval Purifier WHPX 505
Alfa Laval Purifier WHPX 407
Alfa Laval Purifier MOPX 205
Alfa Laval Purifier MAPX 205
Alfa-Laval Heat Plate Exchanger
Alfa Laval Purifier MAPX 204
pump skid Heat exchanger Alfa Laval 15hp
ALFA LAVAL Heat Exchange
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ALFA LAVAL 31830-5010-1 USPP 3183050101
Pennsylvania 013-04B Scale Platb with Alfa Laval Flow 140FBB Pump
Alfa Laval Sanitary Pump Mod #SRU1WLD 1 HP 1" Sanitary Flanges W/Sterling Ctrl
Alfa Laval Valve Basic Top Type SRC 2 7/8" dia (3418)
Alfa Laval Valve Basic Top Type SRC 2 7/8" dia (3417)
Alfa Laval SattCon CU45, Used, CU45SATTCON, Fast Shipping
Alfa Laval SattCon OP45 SCOP45/DX232, New, SCOP45DX232, Fast Shipping
Alfa Laval SattCon CU05-25/SD32D Slimline V0, New, CU0525SD32DSLIMLINE, Fast
Alfa Laval SattCon CU05-45/SD32D/DX232, Used, CU0545SD32DDX232, Fast Shipping
Alfa Laval SattCon SC05-35B, Used, SC0535B, Fast Shipping
ALFA LAVAL ARC-GC-3A-2-77V-20 VLV W/VITO SINGLE SEAT VALVE
1" Sanitary Alfa Laval Actuated Valve with ThinkTop E7
ALFA LAVAL AH11-GC-E-1.5-T316-HNDL NSPP AH11GCE15T316HND
Alfa Laval Valve Basic Top Type SRC 1 3/8" dia (3414)
Alfa Laval Valve Basic Top Type SRC 1 3/8" dia (3415)
Alfa Laval Valve Basic Top Type SRC 1 3/8" dia (3416)
Alfa Laval Valve Basic Top Type SRC 25mm o/o (3410)
Alfa Laval Valve Basic Top Type SRC 25mm o/o (3411)
Alfa Laval Valve Basic Top Type SRC 25mm o/o (3412)
Alfa Laval Valve Basic Top Type SRC 25mm o/o (3409)
Alfa Laval SattCon OP45 SCOP45/DX485G, Used, SCOP45DX485G, Fast Shipping
Alfa Laval SattCon OP45, Used, OP45SATTCON, Fast Shipping
Alfa Laval SattCon OP45 SCOP45/DX232, Used, SCOP45DX232, Fast Shipping
Alfa Laval Valve *New* SRC-W-3A-3-7-20-J
40504 New In box, Alfa Laval 9630856472 Replacement Kit-Seal
Alfa Laval SattCon RAM30T 940-120-211, New, RAM30T, Fast Shipping
Alfa Laval SattCon CU05-25/SD32D Slimline, Used, CU0525SD32DSLIMLINE, Fast
Alfa Laval SattCon SC05-20B, Used, SC0520B, Fast Shipping
Alfa Laval XACV-B/24, Used, XACVB24, Fast Shipping
Alfa Laval Valve Basic Top Type SRC (3413)
Alfa Laval Saunders Multiport Diverter Valve w/ 5 ports
Alfa Laval SattCon CU32, Used, CU32SATTCON, Fast Shipping
Alfa Laval SattCon CU33, Used, CU33SATTCON, Fast Shipping
Alfa Laval SattCon CU35, Used, CU35SATTCON, Fast Shipping
Alfa Laval SattCon ROM30 512K, New, ROM30Sattcon, Fast Shipping
Alfa-Laval: NB 26-24 (B21, B21) Heat Exchanger. No: 5180391 W
ALFA LAVAL GHK11 G&H (3 WAY SANITARY VALVE) 3" SST NEW
Alfa Laval SattCon SD24D Slimline, Used, SD24DSLIMLINE, Fast Shipping
Alfa Laval SattCon SC05-10B 976-001-003, Used, SC0510B, Fast Shipping
ALFA-LAVAL SMU 2A SPEED MONITORING UNIT 551-131-20
ALFA LAVAL ECA50 C ECA50-0100 SATT PROCESS CONTROLLER DIGITAL ABB 498047 40760
Alfa-Laval 1-Way A3 Plug Valve w/Tri-Clamp Ends SS
Alfa Laval SattCon IDPN, New, IDPNSATTCON, Fast Shipping
ALFA LAVAL TT50-31 USPP TT5031
Alfa Laval SattCon SD32D, Used, SD32DSATTCON, Fast Shipping
ALFA LAVAL DE LAVAL ENAMEL PORCELAIN SIGN
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Alfa Laval SattCon ODP.8, Used, ODP8SATTCON, Fast Shipping
Alfa Laval SattCon ODPLD, Used, ODPLDSATTCON, Fast Shipping
Alfa Laval MBOX2072, Used, MBOX2072, Fast Shipping
Alfa laval Salinometer DS20 Type DS 20 Rev. 2
ALFA-LAVAL LKB53A-6700-4A-E-S
ALFA LAVAL LKLA-TNC NSFP LKLATNC
ALFA LAVAL THINK TOP 9612578901 *NEW IN BOX*
Alfa Laval - Heatpac Control Mod. 31830
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Alfa Laval Sauders SS Valve System w/ M0A-N0M12-00 EC Piston Actuator 8 Bar max.
40508 New-No Box, Alfa Laval 9630048053 Pump Rotor 3L SS 10/130
39785 Old-Stock, Alfa Laval Seperation Inc 74693-00 Konsol Bracket, 3/8" Thread
ALFA LAVAL 550557-80 USPP 55055780
Alfa Laval SattCon DX485G, Used, DX485GSATTCON, Fast Shipping
2" ALFA-LAVAL KOLTEK 3AH 52-52 STAINLESS STEEL VALVE
*** FOOD GRADE ***
G&H Sanitary Remote Controlled Valve Alfa Laval Flow Tpye SRC 3"
ALFA LAVAL 700-P-012-K USPP 700P012K
ALFA LAVAL LKLANO NSPP LKLANO
ALFA LAVAL TS-150-B-01 USPP TS150B01
Alfa Laval Saunders 3" ID shutoff Valve late model great condition.
ALFA-LAVAL CBH25-50H (F1, F1) BRAZED PLATE HEAT EXCHANGER ~NEW~
25100 NEW ALFA LAVAL 9612129609 Pump Repair Kit 35mm K
ALFA LAVAL SRC-10 USPP SRC10
38495 New-No Box, Alfa Laval 9611416306 Actuator, 4"
ALFA LAVAL A-080M8200 K100200 ACTUATOR ECX D/A FOR VALVE 3 EPDM SAUND
ALFA LAVAL 9612129609 NSFP 9612129609
ALFA LAVAL 9612-6494-01 USPP 9612649401
ALFA LAVAL KMH5100-9626 USPP KMH51009626
ALFA LAVAL B7MP-3-304 NSPP B7MP3304
32864 New-No Box, Alfa Laval 9880-00 Bearing Sleeve 3-3/8" ID, 5" OD
ALFA LAVAL 70-212-00 NSFP 7021200
ALFA LAVAL 74565-00 NSFP 7456500
ALFA LAVAL 2CMP-3-316 NSPP 2CMP3316
Alfa Laval DXD DUB-SL, Used, DXDDUBSL, Fast Shipping
10195 NEW Alfa Laval 3149205511 Seal Set
ALFA LAVAL 32263-0814-6 NSPP 3226308146
ALFA LAVAL 32263-0914-4 NSPP 3226309144
ALFA LAVAL 32263-0914-6 NSPP 3226309146
ALFA LAVAL 32263-1804-6 NSPP 3226318046
ALFA LAVAL 17-109-U25 NSPP 17109U25
ALFA LAVAL 32330.1419.3 NSPP 3233014193
ALFA LAVAL 481295 NSPP 481295
ALFA LAVAL 9611926737 NSFP 9611926737
ALFA LAVAL 06-532072-01 NSPP 0653207201
ALFA LAVAL 9611-92-4055 NSFP 9611924055
ALFA LAVAL 9611-92-4055 NSPP 9611924055
ALFA LAVAL 9611-92-4055 USPP 9611924055
ALFA LAVAL 9611-92-4058 NSFP 9611924058
ALFA LAVAL 9611-92-4058 NSPP 9611924058
ALFA LAVAL GHK11-GC-POL-2 NSPP GHK11GCPOL2
ALFA LAVAL GHK76MH5000V NSFP GHK76MH5000V
ALFA LAVAL MB-00004 NSPP MB00004
ALFA LAVAL PC14081-2 NSFP PC140812
Alfa Laval/Saunders Butterfly Valve MXMP112TC 20"
Alfa Laval / Saunders Butterfly Valve / Gear MYNB 112TC
Alfa Laval GHPD 332RF Pump
Brand New Alfa Laval Tri Clover A3 Sanitary Pump
ALFA LAVAL GHPD-322 POSITIVE DISPLACEMENT ROTARY PUMP
ALFA LAVAL LKH-70/230 40hp CENTRIFUGAL PUMP
Used- Alfa Laval Thermal Plate Exchanger, 59.25 Square
Alfa Laval Plate Heather Exchanger Model M6-FD
11109-008 Alfa Laval model 10BFG plate style heat exchanger
ALFA LAVAL LKH-45/165 CENTRIFUGAL PUMP
Alfa Laval / Saunders Butterfly Valve 4"
ALFA LAVAL,3", 1X2 PLUG VALVE
Alfa Laval actuated Valve 7715-10m-14p-2x15-e-316l-pl
ALFA LAVAL,3", 1X1 PLUG VALVE
Alfa Laval Air Actuator
Alfa Laval Rotary Pump
ALFA LAVAL SERVO DRIVE 31830-3350-1
ALFA LAVAL,2" 1X1 PLUG VALVE,STAINLESS STEEL
Alfa Laval Think Top Replacement Control Top
45BY-3-02-SFY SPRINGER PARTS FOR ALFA LAVAL VALVES - BALL - OEM P/N 620377
ALFA LAVAL CPM-D-60-GC-3 POL CONSTANT PRESSURE MODULATING INLET VALVE-NEW
882303760 CPM-I-D60 WITH MANUAL AND CONFORMITY CERT!!!
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ALFA LAVAL FLOW SWITCH NSN 5930-01-448-2632 NEW
ALFA LAVAL A3 PLUG VALVE 4"
TRI-CLOVER ALFA LAVAL BUTTERYFLY 3 WAY SHUTTER VALVES AIR OPERATED ETC
ALFA LAVAL SERVO DRIVE SS5
Alfa Laval Saunders DN 50 Valve
41212 Old-Stock, Alfa Laval Seperation 98 01 B Liner, 7-11/16" ID, 21-9/16" OD
SS ALFA LAVAL 1-WAY A3 PLUG VALVE 2"
45BY-3-02-SFY SPRINGER - BALL - ALFA LAVAL P/N 620377 VALVE REPLACEMENT BALL
Alfa Laval Refrigerant Heat Exchanger Type CB14-14H
ALFA LAVAL FILTERING DISK, FLUID PART # 1800-03365 NSN: 4330-14-479-4389
ALFA LAVAL,PN10,1X1 2" PNUEMATIC VALVE,STAINLESS STEEL
Alfa Laval Refrigerant Heat Exchanger, Model: CB76 - 40H S54
Alfa Laval Saunders Diaphragm Valve DN50 1.75" 34598 SS
Alfa Laval Saunders DN 25 Valve
2 Inch Tri Clamp Diaphram Valve Alfa Laval Saunders Stainless Steel USDA/A3/3A
ALFA LAVAL,SRC-W-3A-2.5-9-20H W/HD SPRING,PLUG VALVE
45BY-21/2-02-SFY SPRINGER - BALL - ALFA LAVAL P/N 620262 VALVE REPLACEMENT BALL
1.5 Inch Tri Clamp Diaphram Valve Alfa Laval Crane Saunders Stainless Steel 316L
1.5 In Valve Tri Clamp Alfa Laval Saunders Diaphram Stainless Steel 316L
ALFA LAVAL,SRC-W-3A-2.5-7-20H W/HD SPRING, VALVE
Alfa-Laval model NB26-34H brazed plate heat exchanger
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Alfa Laval Saunders EC Piston Actuator
ALFA LAVAL SAUNDERS EC PISTON ACTUATOR
45BY-21/2-02-SFY SPRINGER - BALL - ALFA LAVAL P/N 620262 VALVE REPLACEMENT BALL
ALFA LAVAL LKLA PNEUMATIC VALVE WITH 2 1/2" BUTTERFLY
ALFA LAVAL,3"X 3"- 4" STAINLESS STEEL PNUEMATIC VALVE
Alfa Laval Heat Exchanger
Alfa Laval 10939820 Refrigerant Heat Exchanger
Caterpillar/AlfaLaval Plate Heat Exchanger Plate As-New
Caterpillar/AlfaLaval Plate Heat Exchanger Plate As-New
TRI-CLOVER AIR OP VALVE SANITARY ALFA LAVAL
New Alfa Laval A10b Heat Exchanger Channel Plate 304 SS
Saunders - Via Alfa Laval air actuator
Alfa Laval Tri Clover TSK5 Lip Seal Housing #2
Alfa Laval Tri Clover TSK3 Lip Seal Housing
Alfa Laval Tri Clover TSK5 Lip Seal Housing
Alfa Laval Saunders Module Remote Indicator
Alfa Laval Saunders EC Piston Actuator 8 bar Max Spring to Close 1/8" NPT (NEW)
Alfa Laval Tri Clover DuraMetallic Mechanical Seal Kit
Alfa laval 3/4 Hook Bolt for spiral heat transfer 737346181
NOS! ALFA LAVAL TEMPRESS RATE OF FLOW INDICATOR 543269-01 6680012775972
ALFA LAVAL SLEEVE PART # AB281-1 NSN: 4330-00-339-3214
2x Alfa Laval Tri Clover Rotary Assembly 55mm Pump Part
For the TSR 5 Pumps, 160-70 / R7400-135
Alfa Laval Oil Pressure Switch M52363 1000psi
Custom Control Sensors Inc. P/N 610G2008 for Alfa Laval
NOS! ALFA-LAVAL PUMP SEAL KIT 31490-0551-5 GHP-601
NOS! ALFA LAVAL SHUT OFF VALVE P/N 535199-02 53519902
Alfa Laval Tri Clover Rotary Assembly 55mm Pump Part
