1764-MM31764-MM31764-MM33.CPU模块中的存储器存储器分为系统程序存储器和用户程序存储器，系统程序相当于个人计算机中的操作系统，它使PLC具有基本的智能，能完成PLC设计者的规定的各种工作。系统程序由PLC的生厂家设计并固定化在ROM（只读存储器）中，用户不能读取。用户程序由用户设计，它使PLC能完成用户要球的特定功能，用户程序存储器的容量以字节（B）为单位。（1）.随机存取存储器（RAM）用户可以用编程装置读出RAM中的内容，也可以将用户程序写入RAM，因此RAM又叫读/写存储器。RAM的工作速度高、价格便宜、改写方便。（2）.只读存储器（ROM）ROM的内容只能读出，不能写入。（3）.可以电檫出可编程的只读存储器（EEPROM）S7-200用EEPROM来存储用户程序和长期保存的重要数据。★厦门泰尼电气有限公司★★联系人：小黄★★QQ：2917675397★★电话：0592-6809319★★手机：18950191386★★传真：0592-6890859（注小黄收）★★邮箱：2917675397@***.com★★地址：厦门市海沧区海沧街道滨湖一里7号2008室★NortelDigitalMobilityController320(NT7B65KK)NORTELSWITCHETHERNET1GBPS8-PORTSDS1404038NORTELBCM50FAXSUITEAUTHORIZATIONCODEIBMNORTELLAYER2/3COPPERETHERNET1GBPS32R1860NortelSR1004SecureEnterpriseRouterNortel/MeridianSL1PBXTelephoneCabinetNortelPackage#58Lines,24Ext,6Phones,Voicemai​lAgilestar-AA1419053-E6-AS-ForNortel-NewinBoxAgilestar-AA1419054-E6-AS-ForNortel-NewinBoxAgilestar-AA1419056-E6-AS-ForNortel-NewinBoxAgilestar-AA1419058-E6-AS-ForNortel-NewinBoxNortelOPTera5200chassisNT0H50AA03OC-48STM-16NortelLayer2/3CopperGbESwitchModuleNortel,AL4500E05-E6ETHERNETROUTINGSWITCH4524GTINortel,AL4500E13-E6GSERSPOWERPOESWITCHTAA2410Nortel,AL2500E12-E6ERS2550T-PWR4810/1002COMBONortel,AL4500E13-E6ETHERNETROUTINGSWITCH4526TNortelOPTera5200chassisNT0H50AA05OC-48STM-16NortelOPTera5200chassisNT0H50AA03OC-48STM-16NortelBCM4-PortBRIMediaBayModuleNortel5510-48TAL1001A0348PortGigabitSwitchNortelNT5C05CD61HELIOSRECTIFIER200/E/48NEWCompleteNortelTelecommunicati​***NetworkNortelMeridianOption61cReadyToBeConfiguredNORTELNTGY30BAEEMFRM-2RADIOMODULE1900MhzNortelBCM50PhoneSystemNortelNTN423BAExtendedShelfProcessorNortelBusinessPhoneSystemPackage#3w/2yrWarrantyNortelNetworksPassport(DJ1412A04-E5)1624GSwitchNORTEL*NTN450AA*OPTERACABINETWITHCA***NortelAlteonSwitchedFirewallDirector5026EB1639131NortelMPR50ModularPowerRectifierNEWNORTELPASSPORT8348GTX-PWRPOEMODULEDS1404094NortelShasta5000BSNNTJT29BB-***-IISubscriberSerNortelShasta5000BSNNTJT20CA-SFCSwitchFabricCarNortelPassport8010DS1402001NortelNetworksDS1404094Passport8348GTXModuleNORTELPassport15000WPDSFPModuleNTNQ64AA16NORTELPassport15000WPDSFPModuleNTNQ64AA12NortelShasta5000SwitchFabricCard(SFC)NTJT20CANortelBCM400StandardwithExpansionChassisNortelNetworksNTCA04EKXR1530.33nmNortel831010-SlotEthernetRoutingSwitchDS1402007NORTELNETWORKSTELEPHONESYSTEMSw/moresNORTELNETWORKSPASSPORT8010COETHERNETROUTINGSWITCHNortelI2002IPPhoneNTDU76Charcoalw/PCPort&PSNortelNorstarT7316ET7316ENT8B27JAAACharcoalRfNORTELSER5500NTJT29CBIPC23MLNORTELSER5500IPC2XL1AAANortelNetworksXLR1201SX1000SXBayNetworksXLR1201SXNorstarNortelMeridianTelephoneSystem7-T7316EPhoneNORTELNTHW18BB6mPKTservSPfunctionprocessorNortelContivityP/NDM14011551100T1/FT1E1WANBundleNORTELNETWORKSNTLX65AADIGLSIGPROCDSPRSCEMODULENortelNTN063FMS18KDDM900Filter190-CY127-F1V5NortelBCM50BCM50VoIPIP7-PhoneTelephoneSystemsMM-8T1E1NortelTa***anSR2104002E5Module31208PortNortelNT0H21CAGE/FCSRM,850nm,2port(SX)OPTeraNewNortelPassport1612GRoutingSwitchDJ1412A03NortelMICSPBXVoiceMailOfficeBusinessPhoneSystemNortelEthRouting8692SFSwitchFabric/CPUDS1404065NortelDS1404098-E5PASSPORTRTGSWCH8324FX24PT100BNEWNortelPassport8624FXERoutingSwModDS1404037NortelNetworksBCM50BusinessVoIPIP5-PhoneSystemNORTELNT0H16JBOPTERA5200B1CH2850NM2.5GBWMT88M0NortelMeridianM5316PhoneNT4X42CentrexAastra$99eaNORTELOPTERANT0H33JA5100OMXC-BANDWMMNP20NORTELMODULEETHERNET10GBPS1-PORTAA1403001AA140300NEW***AYAAA1403001-E5Nortel10GBASE-LR/LWXFPModuleNortelBCM4003.7BCM400R3.740vm32umNortelNorstarMeridianM7310PhoneNT8B20BlackRefNortelBCM4003.7BaseSystem-Standard-NT7B10AAFHNORTELNTHW01EAUsedinGoodQualityNortelBCM50r58x24BCM505.0r5.082416vm2ip2anNortelDS1404094-8348GTX-PWRNortelBCM4003.7SystemStandardNortel380-24FAL4512A014xAA141901316xAA1419014NortelNTPM17ABmoduleforOpteraMetro5000-NEWNORTELNTCA04FKOPTERAOC-192WDMREGENRTRMTRSNT4ME1NORTELNTCA04FPOPTERAOPTA-LH10GRGRCVRUNWMR3F50NORTELNTCA04KDOPTERAOPTA-LH10GRGRCVRUNITWMR3J10NORTELNTCA04LDOPTERAOPTA-LH10GRGRCVRUNITWMR3J20NORTELNTCA04LEOPTERAOPTA-LH10GRGRCVRUNITWMR3JD0NORTELNTCA04MDOPTERAOPTA-LH10GRGRCVRUNITWMR3J60NORTELNTCA04MPOPTERAOPTA-LH10GRGRCVRUNITWMR4FB0NORTELNTCA04NEOPTERAOPTA-LH10GRGRCVRUNITWMR3JP0NORTELNTCA04QEOPTERAOPTA-LH10GRGRCVRUNITWMR3JF0NORTELNTCA04VDOPTERAOPTA-LH10GRGRCVRUNITWMR3J30NORTELNTCA04VEOPTERAOPTA-LH10GRGRCVRUNITWMR3JU0NORTELNTCA04VNOPTERAOPTA-LH10GRGRCVRUNITWMR3AULNORTELNTCA04XPOPTERAOPTA-LH10GRGRCVRUNITWMR3F70NORTELNTCA04YEOPTERAOPTA-LH10GRGRCVRUNITWMR3JX0NORTELNTCA04ZDOPTERAOPTA-LH10GRGRCVRUNITWMR3J0SNortelAL4500E12-e6POEroutingswitch4550T48portNortelMeridianMailNortelDS1404056EthernetRoutingSwitch8648TXMModNortelBaystackBS5520-24T-PWR5520AL1001A06216814NortelBaystackBS5520-24T-PWR5520AL1001A06-E520NortelI2004NTDU82BANTDU82IconKeyswPCPORTPSAgilestar-AA1419025-E5-AS-ForNortel)