PLC作用：
PLC是多數(shù)工業(yè)控制和工廠自動化系統(tǒng)的核心組成部分，通常被稱為工廠的“大腦"，PLC 通過接收和處理來自傳感器和機器的數(shù)據(jù)來實現(xiàn)廣泛的功能，然后使用這些數(shù)據(jù)來控制和制動外部設備。除此之外，成功的設計必須具備可靠性、系統(tǒng)穩(wěn)定性以及與連接的自動化系統(tǒng)的互操作性。
現(xiàn)在工業(yè)上使用可編程邏輯控制器已經(jīng)相當接近于一臺輕巧型計算機，甚至已經(jīng)出現(xiàn)集成個人計算機(采用嵌入式操作系統(tǒng))與PLC結(jié)合架構(gòu)的可編程自動化控制器(Programmable Automation Controller，簡稱PAC)，能透過數(shù)字或模擬輸入/輸出控制機器設備、制造處理流程及其他控制的電子系統(tǒng)。
1、用于開關(guān)量控制
目前，PLC的首要目標，也是別的控制器無法與其比擬的，就是它能方便并可靠地用于開關(guān)量的控制。用PLC進行開關(guān)量控制實例是很多的，冶金、機械、輕工、、紡織等等，幾乎所有工業(yè)行業(yè)都需要用到它。
2、用于模擬量控制
模擬量，如電流、電壓、溫度、壓力等等，它的大小是連續(xù)變化的。工業(yè)生產(chǎn)，特別是連續(xù)型生產(chǎn)過程，常要對這些物理量進行控制。用PLC實現(xiàn)模擬量控制是*可能的。
PLC進行模擬量控制，要配置有模擬量與數(shù)字量相互轉(zhuǎn)換的A/D、D/A單元。它也是I/O單元，不過是特殊的I/O單元。
3、用于運動控制
實際的物理量，除了開關(guān)量、模擬量，還有運動控制。PLC可接收計數(shù)脈沖，加上PLC有數(shù)據(jù)處理及運算能力，若再配備相應的傳感器(如旋轉(zhuǎn)編碼器)或脈沖伺服裝置，則*可以依NC的原理實現(xiàn)種種控制。
4、用于數(shù)據(jù)采集
隨著PLC技術(shù)的發(fā)展，其數(shù)據(jù)存儲區(qū)越來越大。PLC還可配置上小型打印機，定期把DM區(qū)的數(shù)據(jù)打出來。PLC也可與計算機通訊，由計算機把DM區(qū)的數(shù)據(jù)讀出，并由計算機再對這些數(shù)據(jù)作處理。這時，PLC即成為計算機的數(shù)據(jù)終端。
5、用于信號監(jiān)控
PLC自檢信號很多，內(nèi)部器件也很多，多數(shù)使用者未充分發(fā)揮其作用。其實，*可利用它進行PLC自身工作的監(jiān)控，或?qū)刂茖ο筮M行監(jiān)控。
PARKER NEEDLE VALVE 1/4" FNPT, 4F-V6LK-SS-1799, 4FV6LKSS1799 SHIPSAMEDAY#1535Q29
PARKER Miniature BALL VALVE 1/4", 4A-MB4LPFA-SSP, SHIPSAMEDAY#1624B7
PARKER Male Elbow 12BU, 12 CBU, 12CBU 3/4" Tube X 3/4" NPT, Lot Of 6, G#18
PARKER Male Connector 8-12 FTX-SS, 8-12-FTX-SS, LOT OF 3, SHIPSAMEDAY#1327H4
Parker Male Connector 37° Flare, 8-4 FTX-SS, 8-4-FTX-SS, LOT OF 5, SHIPSAMEDAY
PARKER MALE CONNECTOR 3/8" NPT, 4MSC6N-316 & 6MSC6N-316, LOT OF 24#1604N14
PARKER Male Connector 24 FTX-SS, 24FTX-SS, 24FTXSS, 1-1/2 X 11-1/2, Q#2
Parker Male Connector 1/2", 8MSC6N-316, 8MSC6N316, LOT OF 11, SHIPSAMEDAY
Parker Male Connector 1/2" NPT, M6MSC1/2N-316 & M12MSC3/4N-316, LOT OF 4 #1605N7
Parker Kuroda Solenoid With Block, PCS241B-NB-D24SP & PCL241B-NB-D24SP #1540D9
Parker Kuroda Solenoid With Block, PCS241B-NB-D24** & PCL241B-NB-D24** #1540D11
Parker Kuroda Solenoid With Block PCS241B-NB-D24** & PCL241B-NB-D24**, #1540D10
Parker Kuroda Solenoid PCS241B-NB-D24SP, With Block, SHIPSAMEDDAY#1554C2
Parker Kuroda Solenoid PCL241B-NB-D24SP, PCL24B-NB-D24**, SHIPSAMEDDAY#154D4
PARKER Inline Filter 5 MICRON, 1/4" COMP, 4Z(A)-F4L-5-SS, SHIPSAMEDAY
Parker Hannifin manual ball valve 1/2" FEMALE/MALE, XV501SS-8, LOT OF 2 #M15A
Parker Hannifin manual ball valve 1" SST, FEMALE/MALE, XV501SS-16, SHIPSAMEDAY
Parker Hannifin Fixing Clamp 21 cfm Domnick Hunter Air FXKE1, SHIPSAMEDAY#1550E6
Parker Hannifin Aries Servo Motor Drive, AR-01AE, AR01AE, SHIPSAMEDAY#1213GB
Parker Hannifin Aries Servo Motor Drive, AR-01AE, AR01AE, SHIPSAMEDAY#1213GA
Parker Filter 1 Micron Model 4Z-F4T-1-SS, shipsameday, #1547C5
Parker Female Bulkhead 1/2" FNPT X 12MM, M12FBC1/2N-316, LOT OF 3 #1605N6
PARKER FEMALE ADAPTER 3/8" COMP, 6FSC4N-316, 8FSC4N-316 , LOT OF 11 #1606Z15
PARKER EWAL Toggle Lever Bellow Valve 1/4" VCR, SHIPSAMEDAY #132711
Parker ETM6-316, SCM6-316, M6MBC1/4N-316, M6MSEL1/4N-316, M6MSEL1/8N-316 #1605N8
PARKER ELBOW UNION 1", 16EE16-316, 16EE16-SS, 16EE16316, SHIPSAMEDAY #1608P5
Parker ELBOW Flare 37°, 24CTX0-S, 24CTX0S, 1-1/2-11-1/2 X 1-1/2, #134A
PARKER Disconnect Female Thread Nipple 1/4" FNPT, FS-252-4FP, LOT OF 2 #S15V
Parker CYLINDER REPLACEMENT PK152HK001, ShipSameDay W/2-3Days Shipping #1639A8
Parker Cylinder 02.00CBB2AU14AC 1.000, CC564650A, 250psi, Shipsaneday #137G9
Parker CPI Ball Valve 1/2", 8Z(A)-B8LJ-SSP, 8Z-B8LJ-SSP, Shipsameday #ZR3
Parker CPI Ball Valve 1/2" PTFE, 8Z(A)-B8LJ-SSP, 8Z-B8LJ-SSP, Shipsameday #ZE32
PARKER Coupler & Nipple, NSS-371-6FO & NSS-372-6FO, 1 SET, SHIPSAMEDAY#1370Z6
Parker Compumotor M57-51-B, M5751B, Shipsameday W/2-3DAYSSHIPPING#1222G
PARKER Check Valve 3/8", 6Z(A)-C6L-1/3-SS, 6Z-C6L-1/3-SS, SHIPSAMEDAY#102V2
PARKER CHECK VALVE 3/8", 6A-C4L-1-BN-B, 6AC4L1BNB, LOT OF 2, SHIPSAMEDAY#102V3
PARKER Check Valve 1/8" & 1/4" FNPT, 4F-C4L-1/3-SS & 2F-C2L-1-SS, Lot Of 2 #ZG32
PARKER CHECK VALVE 1/4" NPT, 10 PSI, 4M-CAL-10-SS, LOT OF 2 SHIPSAMEDAY#B9E
PARKER Check Valve 1/3 PSI, 4A-C4L-1/3-SS, LOT OF4, SHIPSAMEDAY#1325F6
PARKER Check Valve 1/2", 8A-C8L-1-SS-C3, SHIPSAMEDAY, #1622B4
PARKER Check Valve 1/2", 1/3 psig Crack, 8A-C8L-1/3-SS, SHIPSAMEDAY#1370Z14
Parker Check Valve 1/2" FNPT, 1 Psi, 8F-C8L-1-T-SS, Shipsameday Box "B" #1614B50
PARKER Check Valve 1", 1/3 PSIG, 16A-C16-1/3-BN-B, SHIPSAMEDAY#1605V33
PARKER CAP 3/8" & 1/2", 6BLEN6-316, 8BLEN8-316, LOT OF 18, SHI[SAMEDAY #1604N11
Parker Buttweld Connector 6-1/4 ZHLW2-SS, 6-1/4 ZHBW2-SS, Lot Of 12, #123Q3
PARKER Bulkhead Union 3/4", 12-12WBZ-SS, 12-12 WBZ-SS, 1212WBZSS, shipsameday#S2
Parker Bulkhead 3/8", 6BC6-316, 6BC6316, Lot Of 6, SHIPSAMEDAY
PARKER BONNET NEEDLE VALVE 3/8", 6Z(A)-V6LK-SS, SHIPSAMEDAY#1649Q11
PARKER BONNET NEEDLE VALVE 3/8", 6A-V6LK-SS-1771, SHIPSAMEDAY#1606Z12
Parker Ball Valve Brass 1/2", 8A-B8LJ-BP, 8AB8LJBP, Shipsameday Box B #1614B51
PARKER Ball Valve 3/8", 6Z(A)-NP6LR-SSP, SHIPSAMEDAY#Q1A
