描述
DSSR122 48990001-NK ABB
描述
品牌: ABB
型号:DSSR122 48990001-NK
产地:USA
质保:一年
联系方式:15383419322
邮箱:2970592941@qq.com
存储器主要有两种：一种是可读/写操作的随机存储器RAM，另一种是只读存储器ROM、PROM、EPROM和EEPROM。在PLC中，存储器主要用于存放系统程序、用户程序及工作数据。
系统程序是由PLC的制造厂家编写的，和PLC的硬件组成有关，完成系统诊断、命令解释、功能子程序调用管理、逻辑运算、通信及各种参数设定等功能，提供PLC运行的平台。系统程序关系到PLC的性能，而且在PLC使用过程中不会变动，所以是由制造厂家直接固化在只读存储器ROM、PROM或EPROM中，用户不能访问和修改。
用户程序是随PLC的控制对象而定的，由用户根据对象生产工艺的控制要求而编制的应用程序。为了便于读出、检查和修改，用户程序一般存于CMOS静态RAM中，用锂电池作为后备电源，以保证掉电时不会丢失信息。为了防止干扰对RAM中程序的破坏，当用户程序经过运行正常，不需要改变，可将其固化在只读存储器EPROM中。现在有许多PLC直接采用EEPROM作为用户存储器。
Our company’s main business:
Bentley, Invensys TRICONEX, Woodward, FOXBORO, WESTINGHOUSE, Ryan, Schneider, Modicom, ABB, AB, Motorola, GE Fanuc, YASKAWA Yaskawa, Bosch REXROIH, ACSO, YOKOGAWA, Dark Horse HIMA, EMERSON EMERSON, YOKOGAWA YOKOGAWA, Honeywell, Moore Moore, EPRO, ICS TRIPLEX, bachmann Bachmann and other major brands === = mainly do PLC DCS robot servo four systems of the discontinued spare parts module card parts driver
Our products are widely used in CNC machinery, metallurgy, petroleum and natural gas, petrochemical, chemical, paper printing, textile printing, machinery, electronic manufacturing, automobile manufacturing, tobacco, plastic machinery, electric power, water conservancy, water treatment/environmental protection, municipal engineering, boiler heating, energy, transmission and distribution industry.
person: Manager Cao Telephone: 15383419322 (Same number on WeChat) QQ number: 2970592941
SVG/ASML 923-8067-002 01 Isolation Control Signal Board
New ASML 4022.481.99503 Extraction Sub Assy Filterbox
ASML 4022.436.20262 Baumer Electric Fiber Optic Sensor
ASML 4022.471.9353 V0616 M2 VVORL
ASML/SVG 4022.436.6376.4 Master
ASML 4022.471.6181 Blue Wave Systems DBV44 W2 installed
ASML 4022.471.9353 AND 4022.471.8775
ASML/SVG 4022.454.1086
ASML/SVG 4022.471.5027 TCB Syncbus Trigg
ASML 4022.471.4706 SVG T. Measurment
ASML 4022.436.7338 Interl. Bottom E Assy BS
ASML Current Drive Board 859-0984-004 A
SVG/ASML 923-8167-003 POTCS Valve Board Rev. 3
ASML/SVG 859-2947-003-B 859-3790-004
ASML 4022.470.6469 / 4022.471.6061 MVME2431 MVME 2431
ASML 4022.471.5673 Modular Card
