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)據區(qū)中分配有一個“位"，每個“位"在內存中為一個地址。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。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。

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。

BNT1405+450mm FK10 THK Used Rolled Ball Screw Square Tap Type Linear Bearing

Linear Bearing BIF2510+1293mm THK Used Ground ball screw 10mm lead BK17+BF17

FBS1204B-85L85R250C7-20 / New Precision Ground Ball Screw / KSS / Right&LeftHand

GE2510+800mm Used KURODA Ground Ball Screw Linear Motion Bearing CNC Route

Precision Used Ground Ball Screw THK BNFN2510A-2.5+830mm Double Nut dual BK17

BTK2806-5.3+1627mm Used Rolled Ball Screw THK BK17+BF20 with nut Bracket Linear 

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

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

2020+808mm Rexroth Rolled Ball Screw Used 1503 170 65 EK15+EF15 Nut Bracket

1511-1-7910 935mm MNR:R151117910 20X20RX3,5 T9 Rexroth Bosch Screw New STAR

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

Precision Z axis Unit ball spline THK 100mm Stroke with GroundBall Screw BNK1002

VR4-360PX40Z THK Cross roller Linear bearing Precision linear motion

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

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

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

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

BTK2510B+1456mm THK Rolled Ball Screw Used LM Bearing 25mm diameter 10mm lead

Right Left Helix Ground Ball Screw SFDR1610+1026mm Used TBI Linear Bearing 

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

 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

LM Guide TM Screw Left/right gripper motion Used actuatorunit SEBS9 SSEB10 RSR9 

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

Rolled Ball Screw Used 4010+1220mm FK20 Nut Bracket for industrial mill or lathe

MY1B25-500L SMC Used Rodless Cylinder Stroke 500mm Air Pneumatic Linear Actuator

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

Linear Actuator Parts Used NSK LS15AL+670mm THK BTK1405+645mm EK10+EF10 Mil Lath

Compact Ball Spline New LMT13UU+490mm THK 2Shaft 4Nut LT13UU Low Torque type 

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

KR5520B+1180L0 Linear Actuator Unit THK LM Guide Bearing 20mm lead double block

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

Rolled Ball Screw BTK2010+620mm THK Used LM Actuator No preload type

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

Used Linear Actuator 560mm stroke Cartesian Robot LM System SR15W GE1520 Ground 

VR6M-150HX10Z NIB THK VR Cross Roller Unit precision linear motion Stainless

Ground Ball Screw Used GE2510+1372mm BK20+BF20 KURODA C7 Linear actuator Bearing

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

1504+817mm Ground Ball Screw Used Japan Linear Actuator Motion bearing nopreload

Cartesian Robot Used Linear Actuator 755mm stroke THK HSR15R KURODA HG1632 Screw

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

MYH25-600L-E73A NIB SMC Mechanically jointed Rodless cylinder Linear Guide type

BIF3206-10+1110L THK Ground Ball Screw Used Linear bearing BK25+BF25 CNC Route

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

Ball Spline Machined LMT16UU+236mm THK 1Shaft 1Nut LT16UU Low Torque type CNC

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

BLK3232+1170mm THK Used Rolled Ball Screw NSK with BK25+BF25 Linear Bearing

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

THK Ball Spline LMT16UU+200mm 2Shaft 2Nut LT16UU Low Torque type LM Bearing

Cartesian Robot Used Linear Actuator 750mm stroke LM System HSR25R HG1632 Ground

THK DIR2505-6+408mm Standard Lead Used Rotary Nut Ground Ball Screw 25mm 5mm

LM Guide SLHB16UU-1X335 OZAK Silent smooth motion Ball Bearing Linear actuator 

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

1520+1360mm NSK Used Ground Ball Screw W1513P-8SS-C7S Linear Bearing 20mm PSS15

IAI New Linear Actuator 400mm Stroke ISPDACR-S-N-4-400 for 100W servomotor Robot

THK BNFN2806-5RRG0+520LC5A New Double Nut Ground Ball Screw CNC Route Linear Mot

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

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

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

CY1B50H-1260 SMC RODLESS Pneumatic Cylinder bore 50mm 1260mm Long stroke

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

Preload Type of Precision Ball Screw BLW3232-3.6+1225mm BK20+BF20 Used THK LM BR

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

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

Linear Actuator 520mm stroke Used Robot LM System THK HSR15R Ground Ball Screw

Precision Ground Ball Screw BLK3232-3.6+1270mm THK Used Linear Motion Bearing

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

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

CDG1BN20-75 Lot of 2 Used SMC Pneumatic actuator cylinde 75mm stroke 

CDM2E25-100 1.0MPa SMC OR/OU 

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

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

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

CYV32-800-DCN693CN Precision SMC Rodless Cylinder Pneumatic Air Actuator HSR15

 MY1H25-600L-Z73L New SMC  Mechanically rodless pneumatic cylinder with LM Guide

W2507FA-2-C5T USED NSK Gound Ball Screw 2520+913mm BK20+BF20 Nut Bracket Couplin

ORV16X400 KOGANEI NIB Rodless cylinder Linear Actuator TY-ZE155A2 Max. 0.8MPa 

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

DGP-25-220-PPVA FESTO Used Rodless Pneumatic Cylinder Linear Drive DGP Type for 

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

DEL-Tron Used N-6 Ball Slide Assemblies Unit THK VRT linear motion Inch Lot of 3

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

BIF3206-10+510mm Used Precision Ground Ball Screw THK Linear Bearing NSK CNCRout

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

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

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

Right/Left Helix NSK Ground Ball Screw 1510+900mm BK12+BF12 Coupling Nut Bracket

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

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

THK Precision Rotary Ground Ball Screw BLR3220+665mm Ball Spline BNS3232 NS3232

JENA TEC Ground Ball Screw 3220+817mm Used Linear Actuator CNC Rotary Bearing

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

MXW12-75B SMC Rodless Cylinder Pneumatic Air Actuator Linear Bearing type