描述
用户可以用编程器读出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。它是易失性的存储器,将它的电源断开后,储存的信息将会丢失。
RAM的工作速度高,价格低,改写方便。为了在关断PLC外部电源后,保存RAM中的用户程序和某些数据(如计数器的计数值),为RAM配备了一个锂电池。现在有的PLC仍用RAM来储存用户程序。
锂电池可用2~5年,需要更换锂电池时,PLC面板上的“电池电压过低”发光二极管亮,同时有一个内部标志位变为l状态,可以用它的常开触点来接通控制屏面板上的指示灯或声光报警器,通知用户及时更换锂电池。
(2)只读存储器(ROM)
ROM的内容只能读出,不能写入。它是非易失的,它的电源消失后,仍能保存储存的内容。ROM—般用来存放PLC的系统程序。
(3)可电擦除的EPROM(EEPROM或E2PROM)
它是非易失性的,但是可以用编程器对它编程,兼有ROM的非易失性和RAM的随机存取优点。但是写入信息所需的时间比RAM长得多,EEPROM用来存放用户程序。有的PLC将EEPROM作为基本配置,有的PLC将EEPROM作为可选件。
我们这里有您急需的停产备件,
优势现货,询不到的,买不到的,请联系我们!
绝 对优势,绝 对低价!绝 对正品,优质的产品,一流的服务,充足的库存,
欢迎来电询价,我们将会给您最优惠的价格!
主营:世界知名品牌的PLC、DCS系统备件模块
①Allen-Bradley(美国AB)系列产品》
②Schneider(施耐德电气)系列产品》
③General electric(通用电气)系列产品》
④Westinghouse(美国西屋)系列产品》
⑤SIEMENS(西门子系列产品)》
⑥销售ABB Robots.FANUC Robots、YASKAWA Robots、KUKA Robots、Mitsubishi Robots、OTC Robots、PanasonicRobots、MOTOMAN Robots。
⑦estinghouse(西屋):OVATION系统、WDPF系统、MAX1000系统备件。
⑧Invensys Foxboro(福克斯波罗):I/A Series系统,FBM(现场输入/输出模块)
顺序控制、梯形逻辑控制、事故追忆处理、数模转换、输入/输出信号处理、数
据通信及处理等。Invensys Triconex:冗余容错控制系统、基于三重模件冗余(TMR)
结构的zui现代化的容错控制器。
⑨Siemens(西门子):Siemens MOORE,Siemens Simatic C1,Siemens数控系统等。
⑩Bosch Rexroth(博世力士乐):Indramat,I/O模块,PLC控制器,驱动模块等。
◆Motorola(摩托罗拉):MVME 162、MVME 167、MVME1772、MVME177等系列。
Family Certification
Level Hardware Manufacturer Board BSP Name
68030 Wind River Product Motorola,Inc.Motorola MVME147A mv147
68040 Wind River Product Motorola,Inc.Motorola MVME162PA mv162
68040 Wind River Product Motorola,Inc.Motorola MVME167PA mv167
68060 Wind River Product Motorola,Inc.Motorola MVME172PA mv172
68060 Wind River Product Motorola,Inc.Motorola MVME177P/PA mv177
683xx Wind River Product Freescale,Inc.M86EN302 FADS fads302en
683xx Wind River Product Wind River Wind River SBC360 wrSbc360
AMCC 4xx Wind River Product AMCC AMCC 405GP Walnut Board walnut
AMCC 4xx Wind River Product AMCC AMCC PPC 440GP Ebony ebony
AMCC 4xx Wind River Product AMCC AMCC PPC 440GX Ocotea ocotea
AMCC 4xx Wind River Product Wind River Wind River PPMC440GP wrPpmc440gp
AMCC PPC405xx Uncertified Advanet Inc.A6pci7503 VxWorks 5.5.1 BSP for A6pci7503
AMCC PPC405xx Uncertified Advanet Inc.Advme7507A VxWorks 5.5.1 BSP for Advme7507A
AMCC PPC440xx Uncertified Advanet Inc.Advme7510 VxWorks 5.5.1 BSP for Advme7510
AMCC PPC440xx Not Supported AMCC PPC440SP Evaluation Board(Luan)VxWorks 5.5.1 BSP for amcc440sp
AMCC PPC440xx Not Supported AMCC PPC440SPE Evaluation Board(Yucca)VxWorks 5.5.1 BSP for AMCC440spe
AMD Uncertified ADLINK TECHNOLOGY INC.(Ampro)ETX-GX2 VxWorks 5.5.1 BSP for ETX-GX2
ARM Other Wind River Product ARM Ltd.ARM Integrator 946ES integrator946es
ARM Other Wind River Product ARM Ltd.ARM Integrator 966ES integrator966es
ARM7 Thumb Wind River Product ARM Ltd.ARM Integrator 720T integrator720t
ARM7 Thumb Wind River Product ARM Ltd.ARM Integrator 740T integrator740t
ARM7 Thumb Wind River Product ARM Ltd.ARM Integrator 7T integrator7t
ARM9 Not Supported Fujitsu airman926ej/Fujitsu SoC 802.16 Reference Kit airman926ej
ARM9 Thumb Wind River Product ARM Ltd.ARM Integrator 920T integrator920t
ARM9 Thumb Wind River Product ARM Ltd.ARM Integrator 940T integrator940t
Broadcom BCM125x Wind River Product Broadcom Corporation Broadcom BCM91250a VxWorks 5.5.1 BSP for bcm1250
Broadcom BCM125x Wind River Product Broadcom Corporation Broadcom BCM91250e Sentosa bcm1250e
Cavium Octeon Wind River Product Cavium Networks CN30XX-EVB-HS5,CN52XX-EVB-MB4-Y VxWorks 5.5.1 BSP for Cavium CN50xx/CN52xx
Cavium Octeon Not Supported Cavium Networks CN5800-EVB-NIC4,CN5600-EVB-MB12 VxWorks 5.5 BSP for Cavium OCTEON CN58XX,CN56XX/5434R/54XX
Celeron Uncertified ADLINK TECHNOLOGY INC.(Ampro)ETX-IM266 VxWorks 5.5.1 BSP for ETX-IM266
Celeron Uncertified ADLINK TECHNOLOGY INC.(Ampro)ETX-IM333 VxWorks 5.5.1 BSP for ETX-IM333
Celeron Uncertified ADLINK TECHNOLOGY INC.(Ampro)cPCI-3840 VxWorks 5.5.1 BSP for cPCI-3840
Celeron Uncertified Advanet Inc.Advme8017 VxWorks 5.5.1 BSP for Advme8017
Core 2 Not Supported Emerson Network Power Emerson CPCI-7200 VxWorks 5.5.1 BSP for Emerson CPCI-7200
Core 2 Not Supported Intel Corporation Miscowabic Peak VxWorks 5.5.1 BSP for Miscowabic Peak(AMP)
Freescale 74xx Wind River Product Freescale,Inc.Freescale Sandpoint with PMC74xx VxWorks 5.5.1 BSP for sp74xx
Freescale 74xx Wind River Product Motorola,Inc.Motorola LOPEC-P lopec
Freescale 74xx Wind River Product Motorola,Inc.Motorola MCPN765 mcpn765
Freescale 74xx Wind River Product Motorola,Inc.Motorola MCPN805 mcpn805
Freescale 74xx Wind River Product Motorola,Inc.Motorola MVME5100 mv5100
Freescale 74xx Wind River Product Motorola,Inc.Motorola MVME5500 mv5500
Freescale 74xx Wind River Product Motorola,Inc.Motorola PRPMC800 prpmc800
Freescale 74xx Wind River Product Wind River Wind River PPMC74xx wrPpmc74xx
Freescale 74xx Wind River Product Wind River Wind River SBC7410 wrSbc7410
Freescale 74xx Uncertified Kontron AG VxG4 Dual and Quad 7410 Computing Node VxWorks 5.5.1 BSP for VxG4