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A20B-8100-0261現貨 in stock! 歡迎來電咨詢~！！

A20B-8100-0261,

A20B-8100-0261

該體系采用PLC作為操控中心，完成PID閉環運算、多泵上下行切換、顯示、故障確診等功用，由變頻器調速方法主動調理水泵電機轉速，達到恒壓供水的意圖。

　　一、前語

　　跟著操控技術的發展與完善，變頻器及PLC在各個行業的使用愈來愈廣，PLC與變頻器的可靠性與靈活性得到了用戶的認可。一起傳統的水塔供水方法暴露了許多缺點：水的二次污染，用水高低峰的不平衡，管道閥門易損壞，維修保養費用過高等等。在此條件下各種恒壓供水方法應運而生，其間由變頻器、PLC操控的方法尤為遍及，這種方法的特色：體系穩定，功用強大，變頻器用于供水更加節能，所以廣泛使用在多層住宅小區生活消防供水體系中，現在許多場合也有使用，比方中央空調體系、供水加壓站、集中供熱等，這種方法經受了時刻的考驗，已有許多的使用實例。本文介紹的體系在寶雞某電廠家屬區已從98年運轉至今，體系穩定，性能可靠，得到了用戶的必定和好評。

　　二、體系組成：

　　1、體系概述：

　　該體系由四臺大泵(22KW)與一臺小泵(5.5KW)組成;PLC部分由西門子可編程操控器S7-200系列的CPU226，文本顯示器TD200組成;變頻器采用三菱FR-A540系列，功率22KW。

　　用戶所需的生活用水壓力、消防用水壓力、運轉方法等參數在TD200文本顯示器上設定，壓力傳感器把用戶管網壓力轉換為0-10V標準信號送進PLC模擬量模塊EM235，PLC經過采樣程序及PID閉環程序與用戶設定壓力構成閉環，運算后轉換為PLC模擬量輸出信號送給變頻器，調理水泵電機轉速，達到恒壓供水的意圖。

　　該體系有各個泵的運轉時刻累計功用，經過PLC的數據區保持可以斷電回憶。每次起動時先起動1#小泵，當用水量超越一臺泵的供水能力時，PLC經過程序完成泵的延時上行切換，切換原則為當前未運轉的大泵累計運轉時刻最少的先投入;當壓力超越時，PLC經過程序完成泵的延時下行切換，切換原則為當前正在運轉的大泵運轉時刻最多的先撤出。直到滿足設定壓力為止。尋求的最終目標為壓力恒定。

　　當供水負載變化時，變頻器的輸出電壓與頻率變化主動調理泵的電機轉速，完成恒壓供水。

　　體系還可經過PLC的實時時鐘主動守時供水，用戶在TD200上設定每天最多6段(段數也可設定)守時供水，比方早上6：00到8：30，中午11：20到1：30等。

　　體系可動態顯示各種參數，如設定壓力，運轉壓力，水位高度，運轉方法，實時時刻，日歷，各個泵的運轉時刻累計(準確到秒)，運轉狀況，故障信息等等。為了不使體系中TD200畫面顯得呆板，在PLC程序中操控TD200中的畫面守時切換，動態顯示;

　　體系還有故障自確診功用，各泵發作過載、缺相、短路、傳感器斷線、傳感器短路、水位下限、水壓超高、水壓超低、變頻器故障等，都會有聲光報警，TD200上一起顯示故障類型，告訴設備維修人員處理，并可回憶故障發作時刻及班次，以便追查原因及相關責任。

　　2、作業原理：主動手動方法

　　(1)手動運轉時，可按下按鈕起動中止水泵在工頻狀況下運轉，徹底脫離開PLC及變頻器的操控，該功用首要用在檢修及主動體系出現故障時的應急供水方法中。

　　(2)主動運轉時，悉數泵的運轉依程序主動作業。

　　上行過程：當在主動運轉方法時，按下TD200上的起動軟健，體系先起動1#小泵，PLC程序操控模擬量模塊EM235給定變頻器一固定頻率輸出，此時若用 PID運算輸出直接操控變頻器則(設定壓力大，運轉壓力為零，所以運算輸出最大)變頻器依設定的上升時刻運轉，升速太快，體系沖擊很大。等泵運轉一會兒，管網壓力堆集后，再用PID運算輸出操控變頻器。具體時刻和頻率與管網體系有關，在現場調試時這兩個參數在TD200上設定調整。管網越大，時刻越長。

　　當 1#小泵達到50HZ后，體系壓力仍偏低，則延時一段時刻后，體系靠PLC程序把1#泵切換到工頻運轉，一起由PLC輸出一個開關量給變頻器的MRS端子，變頻器瞬間制止輸出，此時PLC把運轉時刻最少的泵變頻接觸器接通后，撤掉制止輸出，相應的泵變頻起動運轉;延時切斷1#小泵，體系中相應的一臺大泵變頻運轉，壓力主動調理，若體系壓力平衡，則頻率穩定在一個相對的規模，若頻率達到50HZ后壓力依然偏低，則再投入一臺大泵，比較剩下的泵的累計運轉時刻，時刻少的先行投入，以此類推。注意，上行中，只要有一臺大泵運轉，則1#小泵要斷開，大泵與小泵一起運轉時，小泵的功率很低。

　　下行過程：當體系壓力偏高，變頻器運轉在18HZ左右(18HZ以下泵的功率很低，經驗值)時，PLC程序判斷運轉在工頻狀況的泵累計運轉時刻(若只有一臺泵不作判斷)，運轉時刻最多的泵延時先行撤出，在撤出的瞬間，PLC操控變頻器運轉頻率在50HZ，要不體系沖擊過大，簡單有水垂現象，延時一會兒后，再把 PID運算輸出投入即可;以此類推。注意：下行過程中，到最后一臺大泵運轉時，頻率在18HZ左右，體系壓力依然偏高時，則把1#小泵切換到變頻運轉。這種情況在夜間或許發作，當供水管網很大時，也許沒有這個或許性。

　　三、注意事項：

　　1、該體系中有泵的工頻變頻上行切換，為了體系的快速響應，切換時刻最好越短越好，切換時時刻差很小，所以各個泵的變頻接觸器與工頻接觸器最好用可逆接觸器，電氣線路與PLC程序中也要有互鎖功用。避免發作意外短路事端。對體系或變頻器形成危害。

　　2、變頻器上行下行切換時刻設定，假如設定值過大，則體系不能迅速對管網的用水量做出反應;假如設定值過小，則或許引起體系頻繁的投入泵，撤出泵的動作;為此，PLC程序中增加判斷設定壓力與運轉壓力在臨界切換狀況時，只要不超越答應的誤差規模內，不做泵的切換。

　　3、變頻器在上行切換時，必須要有瞬間制止輸出功用，變頻器沒有此功用可用自在停車功用;所以選擇變頻器時要注意這點。

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TLXCDSUOFS33 Quantum SMALL OPC SOFTWARE (max. 1000 items)

FRN3.7C1S-4C 6. 9KVA 9.0A 3.7KW 3相AC380V/50Hz/60Hz

1492-J4-BL 4 square mm Feed-Through Terminal Block

1492-SPM3D200-N MCB Supplementary Protector 20 A

軟啟動器 3RW40552BB45

SIMATIC 存儲卡 6ES7 954-8LL02-0AA0 SIMATIC MC 256 MB

150-SS Hand-Off-Auto Metal Selector Sw Kit

1738-IE4CM12 ArmorPoint 4 Point Input Module

1784-PCM2 DIRECT CONNECT CBL 15PIN D SHELL PLC-2

193-NCIO-43-CNT E300/E200 Control Module Connectors

20-750-PNET2P PowerFlex 750 2-port PROFINET IO Kit

2090-CSBM1DE-14AA05 Kinetix Cable Single DSL 2090-Series

20AB4P2A3AYNNNC0 PowerFlex 70 AC Drive 4.2 A at 1 Hp 20A

GA647IFPRDV00900 GCA iFIX Profsnl SCADA 900 I/O Dev

GP647IFESGRN00075 GCP iFIX Optn: ESig & ERec 75 I/O Run

IC600BF903RR 48Vdc Sink Output Module (8 points)

IC647HSTCR1000KM Collector Redundancy Option for Historian - Standard Server 1,000,000 Points (M4 Key)

IC647TIEM TIE:Texas Instrument TI/5 CTI or Siemens

IC693PBM200 Profibus DP Master Module

IC756LDV010J-912 DV-Draw Development on Intel Linux/Red Hat 32 bit, Japanese v9.12

MicroLogix 1000/1761 System 1761-L16AWA 16 I/O MICROLOGIX 1000

PLC-5/1771 System 1771-OXK CONFORMALLY COATED, POWER CONTACT OUTPUT MODULE

Distributed I/O 1791-NDV BLOCK I/O, 24V DC, 6 POINT ANALOG MODULE

Communications 1786-RPFRL CONTROLNET FIBER RING REPEATER - LONG

Operator Interface 9399-WVDUG WINTELLIGENT VIEW USER GUIDE

Support 9356-PRO2400S SUPT RENEWAL CONTRACT FOR 9356PRO2400

Support 1789-SL51R SUPT REINSTATEMENT CONTRACT FOR 1789SL51

EtherNet/IP Products 9351-HPUSRT INTERCHANGE FOR HP-UX RUNTIME

RSI Software Products 9301-2SE3500FRU3 RSVIEW32 RUNTIME 300-100K UPGRADE IN-SUPT (FR)

RSI Software Products 9356-PRO2500U3R UPGRADE: OUT-SUPT: RSSQL STD.1500 TO 70000 TAGS

Motion Control N-4220-2-H00AA MOTOR,NEMA 42,20 LB-IN,5000 RPM

44A731205-G03 Upgrade Kit Genius IC660BBA024

IC200ALG431 ANALOG MIXED 12 BIT 0-10V INPUT 4CH AND OUTPUT 2CH

IC693PWR328 Power Supply, 48 Vdc, Standard

Silver Series 9500-CPAKPMENE CONTROLPAK RT PLUS - MEDIUM SYSTEM

VSPC32-ADMIN5 VisualSPC Administration Bundle includes Attributes, Analyst, Designer , Wizard, Importer and Reports. 5 License Pack.

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22C-D370A103 PowerFlex 400- 200 kW (300 HP) AC Drive

520480000 Quantum CONN COAX M/F R/A F-STYLE

285-M25M-M05 Source Brake Receptacle Male, M25

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