MDD071A-N-060
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。
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30A ALLEN BRADLEY 1494F-NF30 DISCONNECT SWITCH w/ ON OFF ENCLOSURE HANDLE (B,03)
30E3CD024 Eagle Signal Relay 24VDC B90
3206-2RS JAF Ball Bearing
36C774301AA
38CR-3-.75-18 3/4 HP, 1725 RPM ELEKTRIM MOTOR Frame 56C TEFC 208-230/460V
3M 05710 5/8" Superbuff Adaptor
3RV1011-1HA10 SIEMENS CIRCUIT BREAKER 5.5-8 AMP--SES
3RV1011-1HA10 SIEMENS CIRCUIT BREAKER 5.5-8 AMP--SES
4000-04AW18K462/UNLIMITED
436 10-11" Micrometer Starrett in wodden box
450 Dust MaskBreahing Filter Painters 9 BOXS OF 50
4-MRC bearings#203SZZ,Free shipping lower 48, 30 day warranty!
5) ALLEN-BRADLEY 800T-PT16G SERIES T ILLUMINATED PUSH BUTTONS GREEN
5/2 Way Pneumatic Hand Pull Valve 1/4" Exhaust 1/8 inch NPT with Lock TSV86522M
5uF 440 v OVAL Run Capacitor GE CPT119 CPT00119
6 Inch Pneumatic Gate Valve
6 LOT CR Chicago Rawhide 12330 Joint Radial Oil Seal 1.25" Shaft Diameter
6 Siemens 3RF2 3RF2906-0FA08 Load Monitor Base w/ 3RF2320-1AA04 Contactor 24VDC
60 Copper Sweat Plumbing Fitting 3/4" to 1 1/2"
6016ZZ BALL ROLLER BEARING NACHI 6016Z
6206-88 GENERAL BEARING Single Row Ball Bearing
6310ZZ BALL ROLLER BEARING NACHI
6582 Napa Air Filter
6846 Napa Gold Air Filter (46846 WIX)
800TA
800TA
800T-B6A4 ALLEN BRADLEY 800TB6A4 RED
80in X 1in RATCHET TIE DOWN STRAP & S HOOKS 750KG LOAD ** LOT of 4**
82610 CHICAGO RAWHIDE Seal
82610 CHICAGO RAWHIDE Seal
82610 CHICAGO RAWHIDE Seal
82610 CHICAGO RAWHIDE Seal
8910DPA23V14 Square D Contactor; Definite Purpose 25FLA 35A Res Coil 24V
8910DPA23V14 Square D Contactor; Definite Purpose 25FLA 35A Res Coil 24V
961768 CIRCUIT BOARD with Frame
961768 CIRCUIT BOARD with Frame
A12105CH HINGED JIC BOX ELECTRICAL ENCLOSURE 12" X 10" X 5''
A12105CH HINGED JIC BOX ELECTRICAL ENCLOSURE 12" X 10" X 5''
A-350-T-A Current Transformer Ratio 350/5 VA
A-350-T-A Current Transformer Ratio 350/5 VA
A-A ELECTRIC AAE-KUP14AL-0 GENERAL PURPOSE RELAY WITH BASES LOT OF 3
A-A ELECTRIC AAE-KUP14AL-0 GENERAL PURPOSE RELAY WITH BASES LOT OF 3
AB 509-AOD SIZE 0 509-A0D MOTOR STARTER CONTACTOR SERIES WITH W/34 HEATERS
AB 509-AOD SIZE 0 509-A0D MOTOR STARTER CONTACTOR SERIES WITH W/34 HEATERS
AB 802T-CWP OILTIGHT LIMIT SWITCH allen-bradley
A-B Allen Bradley 100S-D180EA22C 3-Pole Contactor Working
AB Allen Bradley 140M C W452 Ser A 3Phase Compact Busbar
AB Allen Bradley 855T-B24TL6 Blue 24V DC/AC Steady Stack Light & Base 855T-BPM40
A-B Allen Bradley 871TM-DH5NP18-D4 Proximity Sensor Proxy Switch
A-B Allen Bradley 889R-R3AEA-5 Ser A Cordset
AB Allen-Bradley 100-A12ND3 Ser B Relay (Lot of 2)
A-B P27049 TERMINAL BLOCK 15 PIN RAIL MOUNT D-SUB 2090-UXBB-D15 SERIE A NIB
A-B P27049 TERMINAL BLOCK 15 PIN RAIL MOUNT D-SUB 2090-UXBB-D15 SERIE A NIB
ABB 1SCA022739R0850 OHM45L
ABB 1SCA022739R0850 OHM45L
ABB 1SCA022739R0850 OHM45L
ABB 2010PZ10000A PORTABLE MEMORY MODULE ***Factory Sealed***
ABB Asea 2668 156-60/2 Circuit Board
ABB Asea 2668 156-70/3 Circuit Board
ABB Contactor 1SBH143001R8622; NL22E 110V-DC
ABB Contactor 1SBL111004R2310/ AS12-30-10S-23
ABB Delay Relay Module Logic Card GH R 412 0001 R1
ABB FH-3RL SAFTY DOOR LATCH ROLLER (C361KR)CUT-HAM
ABB S201 B10 CIRCUIT BREAKER (lot of 2)
ABB S201 B10 CIRCUIT BREAKER (lot of 2)
ABB S201-C3 Circuit Breaker
ABB S201M-C10 Circuit Breaker (lot of 3)
ABB S201M-C3 Circuit Breaker
ABB S201M-C4 Circuit Breaker
ABB S202M-C3 Circuit Breaker
ABB S203M-C16 Circuit Breaker
ABB S203M-C16 Circuit Breaker
ABB S203M-C6 Circuit Breaker
ABB S503-B6 CIRCUIT BREAKER
ABB S5N INSTANTANEOUS TRIP CIRCUIT BREAKER 2pole 400A 600V Isomax Sace S5
ABB SSAC THD3C43A0 G4308XLF