6SE6420-2UD21-1AA1西门子

6SE6420-2UD21-1AA1

PLC的故障类型有哪些？

外部设备故障

外部设备就是与PLC实际过程直接联系的各种开关、传感器、执行机构、负载等。这些设备发生故障，会直接影响PLC系统的控制功能。因此，维修PLC，首先要分清是外部设备故障，还是PLC本身故障。

系统故障

1）系统故障是影响PLC系统运行的全局性故障。

2）PLC系统故障可以分为固定性故障、偶然性故障。

3）故障发生后，可以重新启动使系统恢复正常，则就是偶然性故障。如果重新启动不能恢复，而是需要更换硬件或软件，系统才能够恢复正常，则认为是固定性故障。

硬件故障

PLC硬件故障主要指PLC系统中的模板、电路损坏而造成的故障。

软件故障

PLC软件故障包含软件错误、操作错误等。PLC软件故障一般可以通过PLC本身的自诊断测试功能或者软件来查看、检查。

福州卓凯电子科技有限公司

Siemens cables Encoder 9042870 & 4x1.5 Power as 1st photo, Without motor, 1.6kg

Siemens Encoder 9042870 & Power Cable only, Without motor, Promotion , CRW

SIEMENS LT-MODUL 15A, 6SN1123-1AA00-0AA1 & 6SN1118-0NH01-0AA0, sn:141&733 dφm PP

SIEMENS LT-MODUL 15A, 6SN1123-1AA00-0AA1&6SN1118-0NH01-0AA0, sn:433&132, dφm

SIEMENS LT-MODUL 50A, 6SN1123-1AA00-0CA1 & 6SN1118-0DJ21-0AA0, sn:1480&0761.

SIEMENS LT-MODUL 80A, 6SN1123-1AA00-0DA1 & 6SN1118-0DJ21-0AA0, sn: dφm khu.

SIEMENS LT-MODUL 80A, 6SN1123-1AA00-0DA1 & Control unit as photos, sn:0268, Pro'

SIEMENS protfibus connector, Lot 4 unit of connector as photos.

Siemens Simatic 6ES7 322-1BF01-0AA0, DO PLC as photos, sn:7587, Promotion 3.

Siemens Simatic 6ES7 322-1BL00-0AA0, Lot 2 of I/O as photos, sn:352/882, Pro'

Siemens SIMATIC 6ES7 390-0AA00-0AA0, 1 unit of BUS connector 720 2001-01 PC-GF20

Siemens SIMATIC S5 6ES5 267-8MA11, Stepper Module as photo, sn:2214, Promotion 1

Siemens SIMATIC S5 6ES5 267-8MA11, Stepper Module as photo, sn:5355, Promotion 2

Siemens SIMATIC S5 6ES5 267-8MA11, Stepper Module as photo, sn:5355, Promotion 2

Siemens SIMATIC S5 6ES5 267-8MA11, Stepper Module as photo, sn:5915, lφo 1

Siemens SIMATIC S5 6ES5 267-8MA11, Stepper Module as photo, sn:8143, lφo 2

Siemens sinumerik 840D, NCU-BOX 6FC5247-0AA00-0AA3 as photo, sn:7974.

Siemens SIRIUS 3RN1013-1BW10, Lot 2 units Thermistor Relay as photo. lφo

Siemens SIRIUS 3RN1013-1BW10, Lot 2 units Thermistor Relay as photo. lφo

Siemens SIRIUS 3RN1013-1BW10, Thermistor relay as photo, sn:E212, Pro 1 pφx

Siemens SIRIUS 3RN1013-1BW10, Thermistor relay as photo, sn:E455, Pro 2 pφx

Siemens SIRIUS 3RN1013-1BW10, Thermistor relay as photo, sn:E566.

Siemens SIRIUS 3RN1013-1BW10, Thermistor Relay as photos, sn:1768, lφo

Siemens Sitop Power 20, 6EP1 436-2BA00 6EP1436-2BA00 as photos, sn:3117.

Siemens SMP 16-SYS 402-A21, 6AR1305-0AA23-0AA0 as photo, sn:9887.

SIEMENS SMP-E356-A61 G34901-C1004-B4, Board sn:3022.RφJ, for part not working.

SIEMENS SMP-E356-A61, G34901-C1004-B4 ,Graphic Board SMP Bus as photo sn:3016

Siemens TDY 19/06...869.0, Bus Connector plug as photo, sn:type 1.

Siemens TDY 19/06...869.0, Bus Connector plug as photo, sn:type 2.

Sigma Koki 1 axis Stage ,Travel approx' 18 mm.,Linear Stage as photos.

Sigma koki Linear stage 40mm. on Z Stage as photo, sn:xxx.

Sigma Koki MHAN-30M, Gimballed mirror mount as photo, for Optical Mirror, sn:xx.

Sigma koki Rotation stage 60mm. as photo, sn:xxx.

Sigma Koki SG AM26-100, Linear Motorized Stages as photo, SN:1047 , lφo

Sigma koki SGSP 60-10ZF, Z axis 5 Phase Stepping motor as photo, sn:0056, lφo

Sigma koki TAM-401C, Linear stage 40mm. Travel±6.5mm. as photo, sn:xxx.

Sigma KOKI TAM-401S, 40x40mm Crossed Roller Stage & Micrometer as photos.

Sigma koki TAM-402C, 40x40x32mm. XY Axis Linear aluminum Stage as photo, sn:xx.

Sigma koki TAS-24301, Leadscrew stages slide as photo, sn: Pro C, dφm eir gift

Sigma koki TAS-24301, Leadscrew stages sllde gulde as photo, sn: lφo F.

Sigma koki TAS-24301, Leadscrew stages sllde gulde as photo, sn: Pro B.

Sigma koki TAS-24301, Leadscrew stages sllde gulde as photo, sn: Pro B.

Sigma koki TAS-24301, Leadscrew stages sllde gulde as photo, sn:A Sold gift dφm

Sigma koki TAS-24301, X axis Leadscrew stages gulde as photo, sn:016A.

Sigma koki TAS-24301, X axis Leadscrew stages gulde as photo, sn:016B.

Sigma koki TAS-24301, XY 2 axis Leadscrew stages sllde gulde as photo, sn:2C lφo

Sigma koki TAS-24301, XY 2 axis Leadscrew stages sllde gulde as photo, sn:Pro 2A

Sigma koki TSD-602SR, 60x60mm XY Axis Steel Slide Stage as photo, sn:4828, Pro 1

Sigma koki TSD-602SR, 60x60mm XY Axis Steel Slide Stage as photo, sn:4831, lφo1

Sigma koki TSD-602SR, 60x60mm XY Axis Steel Stage as photo, sn:4833, pφx Pro 2

Sigma KOKI TSDC-401SZ, 40x40mm XY Axis stainless Stage as photo, sn:3928.

Sigma KOKI TSDC-402S, 40x40mm XY Axis stainless Stage as photo, sn:0579.

SIGMA KOKI YTL-30-30PY1, Fiber laser Lens as photo, rφj unknow data.

Sigma Macro 1:2.8 50mm, Multi coated Lens as photo.

Sigma SX-48, Fuzzy + PID Control excellent as photo, sn:7937,

Sigmapoint Technologies PCV25533 R B14/N2857 5300-00 card as photo, sn:31C1.

Sigmapoint Technologies PCV45224 R B14/N2956 5300-00 card as photo, sn:0075.

Simple Servo , AC Tech, Motor as Photo, for allen bradley drive, sn:9100.

SIN-8A , Adapter RS-232 to RS-422 as photo, sn:xx.

SIN-8A , Adapter RS-232 to RS-422 as photo, sn:xx.

SKF 6200-Z, price 1 unit of Ball bearing as 1st photo, pφx New in bag.

SKF 6203-2Z, price 1 unit of bearing as 1st photo, pφx New , Free combine ship

SKF 626-2Z, price 1 unit of bearing as 1st photo, pφx New , Free combine ship

SKF 626-2Z, price 1 unit of bearing as 1st photo, pφx New , Free combine ship

SM042-1 Objective Lens without camera, WD 100 mm. as photos, Promotion.

SMAC LAC-1, SINGLE AXIS CONTROLLER as photo,sn:0101.

SMB male to SMB female connector cable approx' 149mm. as photo,Free combine ship

SMB male to SMB female connector cable approx'60mm. as photo, Free combine ship'

SMC 10-CDQSB12-15D, 1 units of SMC as 1st photo, New without box.

SMC CDJ2KB16-30-B & D-C73, Air Cylinder as photo, sn:MR.

SMC CDQ2D40-15DCMZ-XC4, Cylinder new in box as photos. set B.

SMC CDQ2D40-15DCMZ-XC4, New Cylinder in box as photos. set A, Promotion.

SMC CDU10-10D, Cylinder Double Acting Single Rod 10mm., New opened bag.

SMC CEU5-D , Multi counter controller as photo, sn:2318, rφj

SMC CG5BA20SV-150, Cylinder Stainless 150mm., Price per 1 unit, Promotion

SMC CQ2A32C-W5283-15, CYLINDER new un box as photos, Promotion.

SMC CQ2A32C-W5283-15, Lot 3 units of CYLINDER as photos, New unbox, Promotion

SMC CQ2A40-50DMZ-XC4 ,New CYLINDER as photos, set B.

SMC CQ2A40-50DMZ-XC4, New CYLINDER as photos, set A, Promotion.

SMC CRJB1-90-F8N, MINI Rotary actuator as photo, sn:xx, A, Promotion 1

SMC CRJB1-90-F8N, MINI Rotary actuator as photo, sn:xx, B, Promotion 2

SMC CRJB1-90-F8N, MINI Rotary actuator as photo, sn:xx, C, Promotion 3 pφx

SMC CRJB1-90-F8N, MINI Rotary actuator as photo, sn:xx, D, lφo 2

SMC CXSM15-60, Dual rod cylinder as photo, New in bag

SMC CXSM20-100, Linear slide as photo, New without Box, CRW

SMC CXSM20-125-Z73-XB11, Linear slide & Proximity SW as photo, New Promotion lφo

SMC EX510-DXN2, 16 npn sensor input block as photo, sn:Set A.

SMC EX510-DXN2, 16 npn sensor input block as photo, sn:Set B, Promotion.

SMC EX510-GMJ1, DeviceNet Gateway CC Link as photo, sn:set A.