P0922YJ
P0922YJ
P0922YJ
GPRS数据传输终端实现监控中心主站与交通控制器的通讯。本系统中采用厦门蓝斯通信有限公司LZ713C GRPS DTU。该DTU功能与特点如下:
A、功能:
1.标准的AT命令界面,方便程序设计;
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福建光沃自动化设备有限公司
联系人 :欧工(销售经理)
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2.TCP/IP Internet内嵌的协议栈,轻松互连;
3.RS232接口方式,更加简便的通讯方式;
4.可通过串口升级程序。
B、性能:
1.使用低功耗高性能的CPU做处理器,32位内部数据总线,4MKB SRAM,2MKB FLASH,可高速处理协议和大量数据;
2.支持全透明及帧格式数据传输;
3.支持TCP、IP、PPP、ICMP、UDP、TELNET、HTTP协议栈;
4.一个符合ISO7816-3IC卡标准的SIM卡座,支持符合GSM11.11和GSM11.10,规范SIM卡;
5.简化的接口设计,使用通用的232接口和简单的AT命令交互界面;
6.供了更方便的电源接口,即可使用外挂电源。又可从串口直接取电;
7.整机功耗小于3W;
8.完善了GPRS 网络中所出现的假拨号,掉线自动重启,远程唤醒等功能;
9.支持远程控制及动态域名解析;
10.同时更具嵌入式系统要求,可提供内置式模块(不带外壳,可通过插针与嵌入式直接系统相连)。
11.同时还有软硬件双重看门狗,在DTU不能正常工作时,能够自动断电复位。
LZ713C GPRS DTU上电后,它会根据预先设定在其内部的IP地址或者是域名来主动访问监控中心服务器,通过企业防火墙和监控中心建立TCP/IP链路。监控中心主站本身维护接入的每个终端的IP地址和ID号,当主站要向某个监控终端提出数据请求时,它会根据IP地址和ID号来找到对应的终端,将命令下发到该终端,终端响应后通过LZ713C GPRS DTU把数据发到监控中心主站,即完成了一个应答式的通讯流程。
(三)交通管理中心的大型综合软件智能交通操作平台。
1、本系统中的组态软件是智能交通操作平台的重要组成部分之一,主要完成对城市交通系统初始化配置工作,由两个相互联系的地图组态模块和参数组态模块组成,绿通组态软件完成初始化配置工作后,给监控软件提供城市电子地图,给数据库服务管理器提供城市交通初始化数据。
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