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实验室连线监控原代码,一台主机采用485总线方式与从机通讯,可以检测学生的连线是否正常,那些线没有连好,非常好的教学实验检测.
Update : 2008-10-13 Size : 65887 Publisher : 贺礼

485通讯接口模块的编程应用,监控显示,检测报警显示,上下值的设置输入输出的结构
Update : 2008-10-13 Size : 344454 Publisher : jiangping

modbus 通讯程序 物理层rs-485
Update : 2008-10-13 Size : 303694 Publisher : maggie

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Port Reader RS232, 485
Update : 2008-10-13 Size : 145518 Publisher : sunzhens

Com Portrs
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串行数据标准选用之我见 RS-232、RS-422与RS-485标准及应用 转换器的构成
Update : 2008-10-13 Size : 52235 Publisher : 何佳俊

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通过电脑串口读取传感器数据并进行实时显示
Update : 2008-10-13 Size : 11302 Publisher : pudongjie

对单片机中的485协议在使用过程的规则和如何编程进行说明 
Update : 2008-10-13 Size : 19403 Publisher : 滕波

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Allen-Bradley通讯 232-485 源程序
Update : 2008-10-13 Size : 24733 Publisher : gaozhuang

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关于RS-232 RS-485串口通信的详细资料
Update : 2008-10-13 Size : 907247 Publisher : 黄黄

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485端口抄表程序,通过485端口进行电表抄写
Update : 2008-10-13 Size : 941056 Publisher : 111111111

采用MAX485 芯片 使用ARM 系统硬件的UART 编程实现RS485 通信的基本收发功能
Update : 2008-10-13 Size : 46342 Publisher : 朱盛之

VFD-A 內部的參數資料可使用內部 RS-485 串聯通訊介面,設定及修改並可控制交流電機驅動 器運\轉及監測交流電機驅動器的運\轉狀態,可提高自動化的能力。
Update : 2008-10-13 Size : 186812 Publisher : 章瑶

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485通讯的简介,有需要网络通讯知识的可以了解一下
Update : 2008-10-13 Size : 272184 Publisher : 任亚星

多点烟雾,温度探测报警程序 基于MSP430F247,485总线.
Update : 2008-10-13 Size : 31397 Publisher : saind

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485单相电能表开发程序,液晶显示。采用AD7755设计,可与掌上电脑连机通信设置各种电能表参数。
Update : 2008-10-13 Size : 8842 Publisher : lm

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RS-485选型及应用指南,包括RS-485/RS-422芯片介绍、RS-485 接口电路、通讯协议、程序设计、应用要点等。
Update : 2008-10-13 Size : 589419 Publisher : yichi7758

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The MAX481E, MAX483E, MAX485E, MAX487E–MAX491E, and MAX1487E are low-power transceivers for RS-485 and RS-422 communications in harsh environments. Each driver output and receiver input is protected against ±15kV electrostatic discharge (ESD) shocks, without latchup. These parts contain one driver and one receiver. The MAX483E, MAX487E, MAX488E, and MAX489E feature reduced slewrate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, thus allowing error-free data transmission up to 250kbps. The driver slew rates of the MAX481E, MAX485E, MAX490E, MAX491E, and MAX1487E are not limited, allowing them to transmit up to 2.5Mbps.
Update : 2008-10-13 Size : 117273 Publisher : ada

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485编程实例分析文档-485 Programming Document Analysis
Update : 2008-10-13 Size : 101045 Publisher : 请不要用公用帐号上载

RS-485标准定义了一个极为坚固和可靠的通信链路,具有高噪声抑制、宽共模范围、长传输距离、冲突保护等特性。 但一个真正牢靠的RS-485网络还有赖于合理的应用。合理的网络布局、信号通道的连续性、周全的保护措施等,在设计之初就应该有一个总体规划-RS-485 standard definition of a very robust and reliable communication links with high noise suppression, and wide common-mode range, long-distance transmission, the conflict protection features. But a real solid RS-485 network also depends on the reasonable application. Logical network layout, channel signal of continuity, comprehensive protection measures, designed from the outset there should be an overall plan
Update : 2008-10-13 Size : 325764 Publisher : 邓光

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485多机通讯软件,可支持255个分机,采用多机通讯方式编程,CRC校验.-more than 485 aircraft communications software, can support 255 extensions, multi-machine communication programming, CRC.
Update : 2008-10-13 Size : 246489 Publisher : 小城有我
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