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停產(chǎn)控制系統(tǒng)零部件、為優(yōu)勢、我們有大量庫存和盈余操控系統(tǒng)零件、停產(chǎn)的控制系統(tǒng)部分硬件、我們也發(fā)布了許多新的硬件和產(chǎn)品來支持你現(xiàn)有的控制系統(tǒng)或運(yùn)用新的控制技術(shù)、停產(chǎn)的“DCS系統(tǒng)備品 備件 PLC模塊 備件”整機(jī)及配件系列、有著強(qiáng)大的優(yōu)勢只要您需要的PLC產(chǎn)品、我們就能幫您找到、公司極具價(jià)格優(yōu)勢。

經(jīng)驗(yàn)表明PLC控制系統(tǒng)出現(xiàn)的絕大部分故障，都是通過PLC程序檢查出來的。PLC控制系統(tǒng)的動(dòng)作都是按照一定順序來完成的，觀察系統(tǒng)的動(dòng)作過程，比較故障和正常時(shí)的情況，大多可發(fā)現(xiàn)疑點(diǎn)，判斷出現(xiàn)故障原因。有些故障可在屏幕上直接顯示出報(bào)警原因，有些雖然有報(bào)警信息，但并沒有直接反映出報(bào)警的原因；還有些故障不產(chǎn)生報(bào)警信息，只是有些動(dòng)作不執(zhí)行；遇到以上兩種情況，跟蹤PLC程序的運(yùn)行是檢查故障的有效方法。 

PLC系統(tǒng)故障分析

PLC主要由中央處理單元、輸入接口、輸出接口、通信接口等部分組成，其中CPU是PLC的核心，I/0部件是連接現(xiàn)場設(shè)備與CPU之間的接口電路，通信接口用于與編程器和上位機(jī)連接。對于整體式PLC，所有部件都裝在同一機(jī)殼內(nèi)；對于模塊式PLC，各功能部件獨(dú)立封裝，稱為模塊或模板，各模塊通過總線連接，安裝在機(jī)架或?qū)к壣稀?br />
PLC控制系統(tǒng)故障分為軟件故障和硬件故障兩部分。PLC系統(tǒng)包括中央處理器、主機(jī)箱、擴(kuò)展機(jī)箱、I/O模塊及相關(guān)的網(wǎng)絡(luò)和外部設(shè)備?，F(xiàn)場生產(chǎn)控制設(shè)備包括I/0端口和現(xiàn)場控制檢測設(shè)備，如繼電器、接觸器、閥門、電動(dòng)機(jī)等。
Avaya Passport 8634XGRS Routing Switch Module DS1404109-E6
Extreme Networks Summit X450-G2-24p-GE4-Base
Extreme Networks Summit X480-48t-TAA
Radiall R380.500.226 
bbblabs 8605 Access Switch DC24 V2.0 81.86S8605DC2DC-R6A
NetCom Systems SmartBits ST-6410 
Extreme Networks Summit 300W AC PSU BF 10943
Extreme Networks Summit X440-48p
DIGITAL MICROWAVE CORPORATION 593/04651
Agilent N2X Series 2x 1000BASE-X
T6737A 
Enterasys SecureStack C2-Series 24-Port SFP
NetCom Systems SmartBits ML-7710 10/100 
TTC/Acterna (JDSU) Fireberd 6000/6000A 
Toshiba A&TB LGR18650P 
Juniper Networks 4-Port 100Base-TX Fast Ethernet PIC PB-4FE-TX
Juniper M20 System Switching Board (16MB DRAM) SSB-E-16-M20
IBM System x3650 T Server 2x Inbbb Xeon 3.20GHz 6GB 798054X
PowerDsine PD-0040
Juniper Networks SRP-40G Switch Route Processor Module ERX-40G2GEC2-SRP
Zebra TC8000 Touch Mobile Computer TC80N0-1101K42ENA
Juniper Networks Route Insight Manager 5001 RIM5001-A-BSE
Enterasys MGBIC-LC09 SFP 1.25Gbps 1310nm bbbberica TSD-S2CA1-FAFM
Juniper MX80 Universal Routing Platbbbb w/ MIC-3D-20GE-SFP and 2x PSU MX80-T-AC
Enterasys Networks X-Pedition Security Router XSR-3250
LISTING?Enterasys S-Series S180 Class I/O Module 24 Ports 10GBASE-T via RJ45 SK8009-1224
TTC Fireberd 2048kb/s G.704 
Juniper Networks J4350 AC Services Router w/ JXU-16GE-TX-S
Enterasys MGBIC-LC09 SFP 1.25Gbps 1310nm Finisar FTLF1318P2BCL
Juniper Networks J6350 NEBS Compliant Services Router w/ 5x UPIMs J-6350-JB-N
APC SC1500I 
Agilent OC-3c/12c STM-1/4c MMF ATM/POS Routing Module E7907A
Juniper Networks SRX5600 Chassis Loaded (see Item Debbbbbbion) SRX5600-CHAS-B
Extreme Networks 10G Interface Upgrade for PureView Appliance PV-A-300-10G-UG
Extreme AP-6522 802.11n Ext Ant Access Point EU Domain AP-6522E-66040-EU
SYMBOL AP6562 802.11N INT ANT OUTDOOR AP 2 RADIO US ONLY AP-6562E-66030-US
Enterasys S-Series S180 Class I-O Fabric Module 8 Ports SK8208-0808-F8
Brocade Mobility 7131 Wireless LAN Access Point Single Radio BR-AP7131-60D20-WW
Extreme Networks Fixed L2 12-Port Switch D2G124-12
Juniper 100-Gigabit Ethernet PIC (T1600 Router) PD-1CE-CFP-FPC4
Agilent N2X 4-Slot Chassis with 2x E7907A-002, 2x E7919A
Juniper STRM 5000 NEBS STRM5000-NEBS-A-BSE
Extreme Networks E4G-400-AC
Enterasys S-Series S155 Class I/O Fabric Module w/ SOK2208-0104 SG5201-0848-F6
Enterasys C4110 Wireless Controller WS-C4110
Adder 1U rack mount 17" TFT console with 8-Port KVM Switch KSR-11708-US-DVI
Extreme Networks Summit X460-48x 
Extreme Networks S8 Chassis S8-CHASSIS
Extreme Networks Summit X460-G2-48p-10GE4-Base
Extreme Networks X460-G2-24p-GE4-FB-715-TAA 16718T
Extreme Networks identiFi C5210 Wireless LAN Controller WS-C5210
Extreme Networks BlackDiamond 8900-10G24X-c 
Superior Modular Products 24 Port Patch Panel 100 Base T Wired DCC4884/25V100
Enterasys S-Series S155 Class I/O Fabric Module ST5206-0848-F6
Enterasys S-Series S180 Class I/O-Fabric Module SG8201-0848-F8
Extreme Networks Network Access Control Appliance IA-A-20
Enterasys 7124/24G 24-Port POE 24 SFP 2 SFP+ 2 QSFP Switch 71G21K2L2-24P24
Extreme Networks S-Series S130 48-Port POE Gigabit Switch SSA-T4068-0252
Enterasys S-Series S140 Class 32-Port 10GBASE-X
Extreme Networks Summit X450-G2-48p-10GE4-Base
Extreme Networks Summit X460-G2-48p-GE4
Extreme Networks IPS G2 X4 Enterprise Appliance Primary IPSG2-X4-PRI 
Extreme Networks Summit X460-G2-24t-24ht-10GE4-Base
Extreme Networks Summit X450-G2-48p-10GE4-FB-1100-TAA 16179T
Extreme IPSG2-X3-PRI
Enterasys S-Series S180 Class 24-Port 10GbE I/O-Fabric Module SK8009-1224-F8
Juniper Networks 24-port 10-Gigabit Ethernet LAN/WAN PIC with SFP+ PF-24XGE-SFPP
Extreme Networks BlackDiamond BD 8900-10G8X-xl 
Enterasys 7124T 24-Port 10Gb SFP+ and 4x QSPF+ Ethernet Switch 71K11L4-24
Extreme Networks Summit X450-G2-48t-10GE4 
Enterasys S-Series S130 Class I/O Module 48 Ports 1000BASE-X via SFP SG4101-0248
Enterasys S-Series S130 Class 48-Port PoE I/O Fabric Module ST4106-0348-F6
Extreme Networks Black Diamond 8800 G24X 24-Port SFP 1000Base-X 
Extreme NX-9000 Enterprise NOC Wireless LAN Controller NX-9000-100R0-WR
Extreme Networks Summit X460-48x-TAA 
Extreme Networks PurView Appliance Sensor 4x SFP+ Ports PV-FC-180
Enterasys S-Series S150 Class 10Gb 8-Port SFP+ I/O Fabric Module SK1208-0808-F6
Extreme Networks Summit X460-G2-48x-10GE4 
Extreme Networks S-Series Stand Alone 48x POE and 4x SFP+ Switch SSA-T1068-0652A
Enterasys S-Series S180 Class I/O Module w/ 4-port VSB Module SL8013-1206
Extreme Extreme IPSG2-X3-SEC 
Avaya TAA ERS 5928GTS-PWR+ 24-Port POE 4-Port SFP+ Network Switch AL590002X-E6GS
Enterasys C5 24-Port 2x Shared SFP 2x SFP+ Gigabit Switch C5K125-24
Extreme Networks 10GB CWDM LR SFP Plus 1271NM 10GB-LR271-SFPP
Enterasys S-Series 3 Slot Chassis w/ Fan S3-CHASSIS-A
Avaya VSP 7024XLS 24-port 10GBASE-SFP+ B2F Ethernet Switch AL700001B-E6
Enterasys C5 SecureStack 24xSFP and 2xSFP+ Managed Switch C5K175-24