6AV6545-0DA10-0AX06AV6545-0DA10-0AX0

PLC對數(shù)字量信號的識別是通過其數(shù)字量輸入模塊完成的。PLC控制軋鋼生產(chǎn)設備時，設備中的壓力、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，每個輸入端子在PLC的數(shù)據(jù)區(qū)中分配有一個“位”，每個“位”在內(nèi)存中為一個地址。讀取PLC輸入位的狀態(tài)值可作為識別數(shù)字量故障信號的根據(jù)。診斷數(shù)字量故障的過程，實質就是將PLC正常的輸入位狀態(tài)值與相應的輸入位的實際狀態(tài)值相比較的過程。如果二者比較的結果是*的，則表明設備處于正常工況，不*則表明對應輸入位的設備部位處于故障工況。這就是PLC診斷基于數(shù)字量信號故障的基本原理。這種診斷方法，故障定位準確，可進行實時在線診斷。通過PLC的圖形功能塊編程，還可將故障診斷融入過程控制，達到保護軋鋼設備的目的。

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鄭娟萍

廈門仲鑫航自動化設備有限公司 

 PLC對模擬量信號的識別是通過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轉換原理，輸入端接收來自傳感器或變送器的模擬信號，輸出端輸出的模擬信號作用于PLC的控制對象。PLC診斷模擬量故障的過程，實質就是將在相應A/D通道讀到的監(jiān)測信號的模擬量的實際值與系統(tǒng)允許的極限值相比較的過程。如果比較的結果是實際值遠離極限值，則表明軋鋼生產(chǎn)設備對應的受監(jiān)控部位處于正常狀態(tài)，如果實際值接近或達到極限值，則為不正常狀態(tài)。判斷故障發(fā)生與否的極限值根據(jù)實際系統(tǒng)相應的參數(shù)變化范圍確定，利用PLC上的模擬量設定開關可精確設置該極限值。

LS20AL NSK LM Guide Brand New Lot of 2 Linear Bearing L1S20 

LWLFG24B+865mm 1Rail 1Block Used IKO LM Guide Actuator THK RSR12WN Lightweight

LRXD25+1620mm IKO Linear Roller Way Super LM Guide Actuator Bearing THK HSR25R

Linear actuator guide bearing Used LY25AL+580mm NSK LGY25 THK SHS25V Rail system

HSR25RUU THK LM Guide Brand New Lot of 2 Linear Bearing

SR15W+898mm Used Rexroth Bosch LM Guide 2Rail 4Block Linear Motion Bearing CNC R

LM Guide THK New HRW35CA+180L 1Rail 1Block Wide Linear Bearing Z axis CNC Route

THK SSR15XW+520mm Used LM GUIDE Linear Bearing 2Rail 4Block DIY Lathe CNC Route

Ultra High Rigidity LM Guide Linear Bearing Used SRN45LR+1596mm THK Roller SRG45

HSR15B2UU+340L Counter fasten hole type Used THK LM Guide Linear bearing 2R4B

LWFS42SL+420mm Used IKO linear Bearing THK HRW27CR NSK Wide LM Guide CNC Route

SH20AN+750mm Used NSK Linear Bearing THK HSR20R LM Guide CNC Route 2Rail 4Block

LWES45 IKO Used LM Guide Bearing Block Cartridge for repair the block

Linear Bearing MISUMI SSEBW16+310mm 1Rail 2Blocks LM Guide THK RSR15WVM

SR15WUUF THK LM Guide New Other Lot of 2 Linear Bearing Raydent NNB SSR15XWUU

HSR45LA THK Used LM Guide Bearing Block Cartridge For maintenance actuator

Used THK FBW3590R+300L Slide pack ball lightweight Rail System 1Rail 1Block

LM16MGA Used THK Stainless Steel / Lot of 2 /LM16 Ball Bush for High temperature

LH25GL+880mm Used NSK Linear Bearing 2Rail 4Block THK HSR25LA LM Guide CNC Route

HRW35CA2UUC0F+660LPF LM Guide THK New 1Rail 2Block Wide Linear Bearing CNC Route

LM Guide Used LWHS25+700L IKO Linear Bearing THK NSK 2Rail 4Block CNC Route

THK LM Guide Used HSR30A+765mm Linear Motion Bearing CNC Route 2Rail 4Block

HSR45LB THK Used LM Guide Bearing Block Cartridge Counter Hole type maintenace

THK Used LM Guide Block SHS35LC Cartridge For maintenance SHS35 Rail Ball Caged 

HSR15A2UU+2080mm Used THK Linear Bearing 2Rail 4Block LM Guide NSK CNC Route

HSR25AUU+1000L THK Linear Bearing Used LM Guide CNC Route Lathe 2Rail 4Block

HCR35A2UU+60/800R Used R Guide Curve LM THK Circular Motion System Bearing

 SR15-460LF THK Linear Bearing 2Rails Order LM Guide Raydent for bottom tapped 

Used THK Ball Slidepack FBW3590R+500L 2Rail 4Block lightweight Rail System for  

Tychoway Buna Band Used 21050 LM Roller Bearing Bosch Rexroth R987144779

THK LM Roller Unit Used LRA1547 compact infinite circulation Miniature Linear BR

FBW50110 Used THK Slidepack nut lightweight Rail System for maintenance Lot of 2

R16533 730mm Used Linear Bearing RexrothBosch HSR35LA THKNSK LM Bearing CNCRoute

FBW3590R Used THK Slidepack nut lightweight Rail System for maintenance Lot of 2

SR15W+767mm Used Rexroth Bosch LM Guide 2Rail 4Block Linear Bearing Motion 3D Pr

LM Guide SR15W2UU+360mm Used THK Linear Bearing Lathe 2Rail 4Block DIY CNC

SHS45C+545mm Used LM Guide THK Linear Bearing QZ seal 1Rail 2Block NSK CNC Route

SR30W2UU+980mm THK Linear Bearing Used LM Guide NSK Linear Motion 2Rail 4Block

MES20+2140mm Used IKO Linear Bearing 2Rail 4Block THK SR20W CNC Route LM Guide

SSR30XW+2000mm THK Linear Bearing Used LM Guide NSK Linear Motion 2Rail 4Block

LM Guide Actuator THK Used HRW35CA+480L 1Rail 2Block Used Wide Linear Bearing CN

INA Carriage RWU35-E-L-G3 Roller Linear Bearing LM Guide Block for Maintenance

THK SR30-668mm LM Guide Rail Used Linear 2Rails maintenance continuation

LM Guide HSR20R+693mm THK Used Linear Bearing NSK 2Rail 4Block CNC Route actuato

MK1501A/09 ZIMMER Used Pneumatic Clamp LM Guide braking elements for linear 15mm

LWHT35+1760mm Linear Bearing LM Guide IKO 1Rail 2Block THK HSR35A CNC Route

Miniature Caged Linear Bearing THK SRS15M+550mm Used LM Guide RSR15 LWL15 CNC

Schneeberger Monorail system BM25 BMD25-G1-V1 for maintenance New block cartridg

Rail Tapped Hole SBI25SL+500mm 2Rail 4Block Used LM Guide CNC Route THK HSR25R

Linear actuator guide bearing Used R1622 2+770mm Bosch Rexroth THK SHS25V CNC Ro

SH25BL+1795mm LM Guide 1Rail 3Block USED NSK Linear Bearing THK SHS25LV CNC Rout

SR30TB THK Used LM Guide Block Cartridge For maintenance Lot of 2 NO TAP type

1671-2 Series 998mm STAR Bosch Rexroth Used LM Guide THK HRW35CA Linear Bearing

BM35 BMD35-G1-V1 Schneeberger Monorail system maintenance New block cartridge

SSR25XW2UU+2050L Linear Bearing Used THK NSK LM Guide Bearing SR25W CNC Route

SBG20FL+280mm SBC Used LM Guide Linear Bearing HSR20A CNC Route 2Rail 2Block

Scratched R1605 76-1510mm Bosch Rexroth 30mm Linear bearing rail for block and c

HSR25LA2UU+1050mm Used THK Linear Bearing 1Rail 2Block NSK LM Guide CNC Route

Linear Bearing New MISUMI SSEB13+310mm Miniature  THK RSR12 1Rail 2Block

HSR45LR THK Used LM Guide Block Cartridge For maintenance 

Wide LM Guide RSR12W+680mm Linear Bearing Used Rexroth R04432 THK 2Rail 8Blocks

RA35GM+540D NSK Used Roller Linear Bearing Super high load capacity SRG35LC THK

LM Guide Used BRS20B+820L ABBA Linear Bearing THK SR20W 2Rail4Block CNC Route

ZIMMER MK1505AK JH/98581 Used Clamping, braking for linear bearing Bosch Rexroth

LH25BN+1840mm NSK LM Guide Long Actuator THK HSR25LR 2Rail 4Block CNC Route Mill

Linear Ball Bush SMT30GWUUESK NB Nickel plated electroless LM30 Lot of 2

THK LM Guide block Used HSR35LB no tapped hole type

HRW27CR+620mm THK LM Guide Low profile compact Linear bearing 1Rail 1Block

HIWIN LM Guide Block Cartridge LGH35CA Old style HGH35CA for maintenance

LWLF24+1160mm IKO Used LM Guide THK RSR12W Linear Bearing 1Rail 2Block

NSK High rigidity Roller Used LM Guide RA45EM+570mm Linear Bearing THK SRG45C 1R

MSA25LE+920L lubricate seal LM Guide Used AMT PMI Linear bearing HIWIN HGW25H

RSR12+285mm NB SEBS12 Japan Used LM Guide THK NSK IKO CNC Route 3D Printer

HIWIN LM Guide Block Cartridge LRH20CA Old style EHG20SA for maintenance

LE15AL+435mm NSK Used Wide Linear Bearing THK RSR15W 2Rail 4Block LM Guide CNC

HSR25AUU THK LM Guide Brand New Lot of 2 Linear Bearing

LM Guide SR15W+1890mm THK Linear Bearing NSK LS15AL 2Rail 6Block CNC Lathe Route

HRW17CA+470mm 1Rail 2Block Used THK Wide LM Guide Linear Bearing NSK CNC Route

LRXD25+340mm IKO Roller LM Guide 2Rail 4Block Used THK SRG25R Linear Bearing CNC

HSR20LR2UU+700mm THK Used LM Guide CNC Linear Bearing 2Rail 4Block Lathe Mill

Linear Bearing HSR25LR2UU+560L THK Used LM Guide 2Rail 4Block NSK CNC Route

HSR30RUU THK LM Guide Brand New Linear Bearing

ZIMMER MK3505AK Used Clamping, braking elements for linear rail Bosch Rexroth 35

SR15W2UU+640mm Used Linear Bearing THK LM Bearing CNC Lathe Mill 2Rail 4Block

HCR35AUU+60/600R Round Linear Bearing R Guide Curve LM THK Circular Motion Syste

KWVE20-B-L G4 V1 INA Linear Bearing LM Guide Block New In Box for Maintenance 

Round Linear Bearing Used HCR35A2UU+60/800R  R Guide Curve LM THK Circular Motio

MBPS3501AS1 ZIMMER 35mm LM Used Pneumatic Clamp Emergency OFF function for HSR35

LLTHC20UT1P5+1746mm THK HSR20R SKF Used LM Guide Linear Actuator bearing 2R,4B

LAW21EL+710-2 Linear Bearing 1Rail 2Block NSK Used Wide type K1 lubricate seal

LM Guide GSR20VUU+340LF THK Self adjustment capability 2Rail 2Block Special Line

SR15W2UU+640mm Used Linear Bearing THK LM Bearing CNC Lathe Mill 2Rail 4Block

LMF-310 Guided Encoder Measuring 1520mm Rails New AMO R1605 13 with Scale Tape 

LRXG30+450mm IKO Used Linear Roller Way Super X robust THK SRG30 Precision Route

RK20GUU NB Used Linear Bearing Slide Rotary Bush Lot Of 2 complex Linear Motion

TSUBAKI NEW LM Guide Block Cartridge H45TB HBW45TB for maintenance HSR45B

SHS20LC2SSC0FMS+700LHF New THK Linear Bearing LM Guide 2Rail 4Blocks CNC Route

HSR45-1724L LM Guide Rail Used THK Linear Bearing maintenance or continuation

FBW3590R+500L 1Rail 2Block THK Slidepack Roller Rail System for maintenance

NSK SS25AL+1720L Used LM Guide THK SSR25XW Linear Bearing CNC Route 2Rail 4Block

HSR35ASS THK LM Guide Block Cartridge New Bulk package Linear Bearing

RSR12W+320mm Linear Bearing Used Rexroth Bosch R04432 THK Wide LM Guide 2Rail 4B

LH20EL+1100mm NSK LM Guide Used Linear bearing THK HSR20A CNC Route Lathe Mill

Schneeberger New BM35 BMB35-G1-V1Monorail system maintenance block cartridge

SR25W+468L THK Used Linear Bearing for  high temperature LMGuide NSK 2Rail4Block

SERS16+670mm NB Used SER15A Roller Guide Precision Linear Bearing RSR15

HSR35RUU THK LM Guide Block Cartridge New Bulk package Linear Bearing

R162241420 Bosch Rexroth Star Block bearing for linear rail Cartridge

HRW21CR2UU+880L Used LM Guide THK wide  Low profile Linear Bearing 1Rail 2Block

FBW3590R+300L 2Rail 2Block Used THK Slidepack ball lightweight Rail System 

SR25-1840L LM Guide Rail Used THK Linear Bearing for maintenance or continuation

INA New KWVE15BS+280mm 2Rail 4Block Linear Bearing SR15W THK CNC Route

LRXD25+2100mm IKO Linear Roller Way Super LM Guide Actuator Bearing THK HSR25R

SHS35-2680mm THK Used LM Guide actuator linear rail bearing SHS35V,SHS35C,SHS35R

Carriages KWVE25-B-SN INA Linear Bearing Lot of 2 LM Guide Block New In Box 

IKO Linear Bearing LM Guide block Used LWHT65 THK HSR65A LH65 for maintenance

SR25-659mm LM Guide Rail Used THK Linear 2Rails for maintenance or continuation

SBG35FL+800L New SBC Linear Bearing LM Guide 2Rail 2Block THK HSR35A Rail Way

HSR15B+1080-3 USED LM Guide THK Double Seal Metal Scraper QZ 1Rail 3Block Linear

RSR12WM+430mm Used LM Guide Bearing THK 2Rail 4Block IKO NSK Wide Miniature