6AV6545-0DA10-0AX06AV6545-0DA10-0AX0
PLC对数字量信号的识别是通过其数字量输入模块完成的。PLC控制轧钢生产设备时，设备中的压力、温度、液位、行程数字及操作按钮等数字量传感器与PLC的输入端子相连，每个输入端子在PLC的数据区中分配有一个“位”，每个“位”在内存中为一个地址。读取PLC输入位的状态值可作为识别数字量故障信号的根据。诊断数字量故障的过程，实质就是将PLC正常的输入位状态值与相应的输入位的实际状态值相比较的过程。如果二者比较的结果是*的，则表明设备处于正常工况，不*则表明对应输入位的设备部位处于故障工况。这就是PLC诊断基于数字量信号故障的基本原理。这种诊断方法，故障定位准确，可进行实时在线诊断。通过PLC的图形功能块编程，还可将故障诊断融入过程控制，达到保护轧钢设备的目的。
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郑娟萍
厦门仲鑫航自动化设备有限公司
PLC对模拟量信号的识别是通过PLC的模拟量输入输出模块来完成的。模拟量输入输出模块采用A/D转换原理，输入端接收来自传感器或变送器的模拟信号，输出端输出的模拟信号作用于PLC的控制对象。PLC诊断模拟量故障的过程，实质就是将在相应A/D通道读到的监测信号的模拟量的实际值与系统允许的极限值相比较的过程。如果比较的结果是实际值远离极限值，则表明轧钢生产设备对应的受监控部位处于正常状态，如果实际值接近或达到极限值，则为不正常状态。判断故障发生与否的极限值根据实际系统相应的参数变化范围确定，利用PLC上的模拟量设定开关可精确设置该极限值。
SR15W2UU+366mm Used Rexroth Bosch LM Guide 2Rail4Block CNC Route Linear Bearing
Linear Bearing Used IKO LWLFG42B+320mm THK, NSK LM Guide 1Rail 2Block CNC Route
LM Guide Used IKO LWLC5+22mm Lot of 4 RSR5 THK Miniature Linear Bearing
HSR15R+520mm THK Used Linear Bearing NSK LM Guide 1Rail 2Block Raydent CNC Route
SSR15XW2UU+500L THK LM Guide 2Rail 4block New Surplus
MR12MN2UU+493mm CPC Used LM Guide/ Linear Bearing / THK RSR12 / LWL12 CNC Route
SR15W2UU+520mm Used Linear Bearing THK Raydent LM Bearing CNC Route 2Rail 4Block
Linear Bearing MSA20E+880L New PMI AMT LM Guide THK HSR20A 2Rail 4Block CNC Rout
Used Linear Bearing LM Guide AMT MSB15S+260mm THK SR15W 2Rail 4Block 3D Printer
SSELB16+150mm Used MISUMI Linear Bearing THK RSR15N NSK LM Guide 2Rail 2Block
MLF42+434mm IKO Used LM Guide THK, NSK Linear Bearing 2Rail 4Block RSR15W C Lube
HR20MN+830 Used LM Guide CPC 2Rail 4Block THK HSR20R LH20AN CNC Route lathe mill
Curve LM Guide THK Used Order made HCR25A+30/300R Round Linear Bearing Circular
SR15W+580mm Used Rexroth LM Guide Linear Bearing THK CNC Route 3D Printer 2R,4B
LM Guide SSR25XV+280mm THK Used Linear Bearing SR25V 2Rail 4Block CNC Route
EGH20SA+580mm New HIWIN 2Rail 8blocks THK SR20V CNC Route Anti Rust Raydented
SSR25W2UU+520L Linear Bearing Used THK NSK LM Guide linear motion CNC Route
HR1123+230mm Separate type Linear bearing Used THK LM Guide 2Rail 4Block adjusta
SR15W+1460mm Used LM Guide THK Linear Bearing 2Rail 4Block Motion preload motion
LMBM12+220mm TSK Used LM Bearing 2Rail 8block RSR12 THK NSK Linear motion Guide
THK LM Guide Used SR20V2+940mm Linear Bearing 2Rail 4Blocks Cheap and free ship
SR20WUU THK LM Guide Block Brand New Lot of 2 Linear Bearing Cartridge
LH20EL+1120mm NSK LM Guide Used Linear Bearing CNC Route THK HSR20A 2Rail 4Block
BRS15B+630mm Used ABBA Linear Bearing LM Guide THK SR15W 2Rail 2Block NSK LS15AL
THK LM Roller Unit Used LR1547 infinite circulation miniature Linear Bearing
4RSR15VM+780mm THK Used Linear Bearing LM Guide Miniature System 2Rail 8Block
LWLC12B+425mm IKO Mini LM Guide Linear Bearing 2Rail 4Block Raydent CNC Route
LS15CL+480mm Used NSK Linear Guide Bearing LM THK SR15V CNC Lathe Mill Router
LM Guide LS20AL+692mm Used Linear Bearing NSK THK SR20W 2Rail 4Block CNC Route
Liner Bearing LS15FL+535mm Used LM Guide NSK THK SR15TB 2Rail 4Block CNC Route
NSK Linear Bearing LS15ALK1+760mm 2Rail 4Block SR15W THK LM Guide CNC Route
Linear Actuator bearing NSK LS25AL+1250L Used LM Guide THK SR25W Raydent CNC Rou
LU12+560mm NSK Used Linear Bearing LM Guide Miniature System THK RSR12 IKO LWL12
R16662+280mm Rexroth Bosch STAR Used LM Guide Linear Bearing Slim Short Block
LM Guide Used MGW15C+845 Hiwin Linear Bearing Wide Low height 1Rail2Block RSR15W
SHW27CR+1060mm Used LM Guide 1Rail 2Block Low compact type THK Linear Bearing
HSR15A2UU+800mm R1651 1 Bosch Linear Guide Bearing Used 2Rail 4Block THK NSK CNC
HSR30LR+245mm HSR30H THK Used LM Guide CNC Route NSK Linear Bearing 1Rail 1Block
1671-8+520mm LM Guide Low Height Wide Type Used STAR Bosch Rexroth THK HRW27CA
RSR12ZM+493mm Used Linear Bearing Miniature THK LM Guide 2Rail 4Block NSK,IKO
SR25W2UU+1670mm THK Used Linear Guide Bearing LM Actuator 2Rail 4Block CNC Route
LM Guide Actuator Used MLC20+138mm 2Rail 4Block Compact Miniature IKO MISUMI NB
THK HRW50CA Surplus LM Guide Block Cartridge Linear Bearing BRG-I-4
RSR15+70mm THK Used Linear Bearing LM Guide Miniature System NSK 2Rail 2Block
THK Old LM Guide Bearing HRA Type 2Blocks HR1530 HRW27 for maintenance BRG-I-5
RSR9KMUU+174L THK Used LM Guide Miniature Linear Bearing 2Rail 2Block with plate
HSR15R+640mm THK Used Linear Actuator Bearing LM Guide 2Rail 4Block CNC 3D Print
RSR12+145mm TSK Used LM Bearing 2Rail4block LMBM12 THK NSK LU12 Linear Guide CNC
NSK SS25AL+340L Used LM Guide THK SSR25XW Linear Bearing CNC Route 2Rail 4Block
RSR9KM2UU+350mm THK Used LM Guide / Miniature Linear Bearing / NSK CNC Route
RSR12WVM+87mm Used Linear Guide Bearing THK 2Rail 2Block IKO NSK Wide Miniature
Curve LM R Guide Used HCR15A+60/150R Round Motion THK Circular System 1Rail1Bloc
SRS15WM+350mm 1Rail 2Block THK Used Linear bearing RSR15W No Preload lightweight
HSR30A THK LM Guide Brand New Linear Bearing
LM Guide LH12AN+425mm NSK Miniature Linear Bearing THK HSR12RM 2Rail 2Block CNC
Wide and Low height LM Guide HRW17CA+550mm 1Rail 2Block Used THK Linear Bearing
LS15CL+1480mm Used NSK Linear Guide Bearing LM THK SR15V 2Rail 8Block CNC Lathe
LS20CL+416mm NSK Linear Bearing SR20V THK Used LM Guide 2Rail 4Block CNC Route
HSR15A2UU+520mm Used THK Linear Bearing 2Rail 4Block LM Guide NSK CNC Route
SR25W2UU+784mm THK Used Linear Guide Bearing LM NSK 2Rail 4Block CNC Route
LWHS20SL+890mm Used IKO Linear Bearing THK,NSK LM Guide Stainless steel type
RSR9WVM+68mm THK Used LM Guide Linear Bearing NSK IKO CNC Route 4Rail 4Block
HSR20LR2UU+680mm THK Used LM Guide Linear Bearing 2Rail 4Block CNC Route
Round Linear Bearing Used HCR15A+60/400R R Guide LM THK Curve Motion Circular
THK LM Guide Used SR20V+460mm Linear Bearing 2Rails 4Blocks CNC Route NSK, IKO
NSK LU15+780mm Used LM Guide Linear bearing THK RSR15 2Rail 4Block No preload Ty
LS15CL+640L NSK User LM Guide Linear Actuator bearing THK SR15V 2Rail 4Block
LWLG12B+545mm Used IKO Linear Bearing Miniature LM Guide 2Rail 4Block RSR12N THK
LM Guide Used HGH20C+700mm HIWIN Linear Bearing Actuator THK HSR20R 2Rails 4Bloc
LWES25+736mm IKO Used Linear Bearing LM Guide THK SR25W 2Rail 4Block CNC Route
CSR15 Used THK Orthogonal Linear Bearing HSR15 LM Guide X-Y Motion stage Axis
Linear Bearing LM Roller Unit Used IKO SR1540 infinite circulation
R1605 76-1510mm Bosch Rexroth 30mm Linear bearing rail for block and cartridge
PE12BR+300mm NSK Used LM Guide RSR12WN LE12BL Raydent 2Rail 2Block CNC Route
SR15W2UU+298mm Used Linear Bearing THK LM Bearing CNC Route Lathe Mill NSK IKO
RSR12ZM+585mm Used LM Guide Miniature Linear System Bearing 2Rail 2Block 3D Prin
HSR35-1240L LM Guide Used THK Linear Bearing for maintenance Rail continuation
LWLF18+310mm Used IKO Miniature LM Guide THK RSR9W 2Rail 4Block Linear Actuator
SSR15XW+640mm THK USED LM GUIDE Linear Bearing 2Rail 4Block DIY CNC Route NSK
LM Guide Used SS15AL+325mm NSK Linear Actuator Bearing THK SSR15XW CNC Route
Rexroth Bosch New LM Guide R1653 713 20 HSR30LA+680mm 2Rail 4Block CNC Route
THK LM Guide Used 2SRS12WM+350L Linear Bearing 2Rail 4Block wide profile CNC Rou
HSR20A2UUF+2320LTF New THK Linear Bearing to extend LM Guide 1Rail 2Block CNC
SHS20V2UU+830mm THK Linear Bearing Used LM Guide 2Rail 4Block NSK CNC Route
Linear Actuator Bearing GSR20T2UU+1060LF THK Self adjustment capability 2Rail
Linear Guide Bearing RSR12WVM+470mm Used THK 2Rail 4Block IKO NSK Wide Miniatur
LH25GL+540mm Used NSK Linear Bearing 2Rail 4Block THK HSR25LA LM Guide CNC Route
LWLG9B+820mm IKO Used Linear Bearing LM Guide Miniature System THK RSR9N NSK 2Ra
RSR9W+50mm New LM Guide THK Miniature Linear Bearing Raydent Lot of 10
Bosch Rexroth 15+2200mm R16221 Used Long LM Guide Bearing THK SR15W 2Rail 6Block
LWLC7B+240mm Used IKO LM Guide Linear Bearing 2Rail 8Block CNC Route THK
Linear Bearing Rail SR30-1240L LM Guide Used THK Linear Bearing for maintenance
LW21EL+1380mm Used LM Guide NSK HRW21CA THK wide Linear Bearing 1Rail 1Block
LM Guide Used LE12AR+590mm NSK RSR12W THK Linear Bearing CNC Route 1Rail 2Block
SSR20XW2UU+940L Linear Bearing Used THK NSK LM Guide Bearing CNC Route 2Rails 4B
R1653 313 20 Bosch Rexroth Star Used 35 size LM Guide Block Cartridge maintenanc
THK SR35 Linear Rail 1577mm LM Guide 1Rail for maintenance or continuation CNC
CSR20 Used THK Orthogonal Linear Bearing HSR20 LMGuide XY Motion Auto stage Axis
LWLF42+480mm Wide LM Guide Used IKO Linear bearing 2Rail 4Block THK RSR15W
SR20UU Used NB Stroke Bush / ST20UU THK / Lot of 2 / Linear Bearing / LM Bushing
LE15AR+550mm NSK Used Wide Low Profile Linear Bearing THK RSR15W 2Rail 4Block
HSR15AQZUU Lot of 2 Used THK Linear Bearing LM Guide Block cartridge maintenace
LH20AN+750mm Used NSK Linear Bearing THK HSR20R Japan LM Guide CNC Lathe Route
2RSR9WN+190L THK Miniature Used LM Guide Linear Bearing 2Rail 4Block no preload
Miniature LM Guide RSR15VM+640mm Used preload adjustable bracket THK Linear Bear
HSR15A2UU+818mm Used THK Linear Bearing 2Rail 4Block LM Guide NSK CNC Route
HSR15RQZUU Lot of 2 Used THK Linear Bearing LM Guide Block cartridge maintenance
THK LM Guide Used HSR30A+790mm Linear Actuator Bearing CNC Route 2Rail 4Block
LM20MGA Used THK Stainless Steel / Lot of 2 /LM20 Ball Bush for High temperature
NR35LR2UU+520L THK Linear Motion Bearing Used LM Guide for Heavy weight Axis
HSR25R2UU+1110mm Used THK LM Guide 2Rail 4Block NSK Linear Bearing CNC Mill Rout
LM Guide Used THK HSR15A2UU+280mm Linear Bearing 2Rail 4Block Lathe CNC Route
THK HRW21 Rail with preload adjustable block HR1123 Used 1Rail 2Block 380mm
SRN45LR+880mm THK Caged Roller Linear Bearing Used LM Guide Ultra High Rigidity
THK RSR15N Type Used MNN15-G1+590mm SCHNEEBERGER Linear Bearing 2R 4Blocks RSR
Carriages KWVE15B INA Linear Bearing Lot of 2 LM Guide Block New for Maintenance
HCR15A+60/400R Round Linear Bearing Used R Guide LM THK Curve Motion Circular Sy
Linear Bearing HSR20R+1190mm Used THK LM Guide 2Rail 4Block NSK,IKO CNC Route
HRW17CA+470mm Used THK Wide LM Guide Linear Motion Bearing IKO,NSK 1Rail 2Block
THK HCR25AUU+30/500R 1Rail 1Block Used Round Motion Curve LM Guide bearing
