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Description: 将台达VFD－m1型变频器直接与上位机相连，便于实现分布式控制。通过VB的人机界面实现对变频器的分布式网络控制，应用RS－485总线结构，可实现对多达32台变频器的控制
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Size: 158833 |
Author: hjjhjh |
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Description: VB做的RS484通讯程序源代码，完成PC与外围设备的通讯
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Size: 2268 |
Author: bruce |
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Description: 485通讯是工业现场用的很广泛的通讯方式，现在仍然在应用-485 communications industry is the scene of extensive means of communication, still in the application
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Size: 381952 |
Author: |
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Description: Serial Port Complete, Programming and Circuits for RS-232 and RS-485 Links and Networks
-Serial Port Complete, Programming and Circuits for RS-232 and RS-485 Links and Networks
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Size: 102400 |
Author: han |
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Description: 什么是RS-232-C接口？采用RS-232-C接口有何特点？传输电缆长度如何考虑？-What is the RS-232-C interface? Using RS-232-C interface What are the characteristics? Transmission cable length how?
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Size: 8192 |
Author: steven |
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Description: 将台达VFD－m1型变频器直接与上位机相连，便于实现分布式控制。通过VB的人机界面实现对变频器的分布式网络控制，应用RS－485总线结构，可实现对多达32台变频器的控制-Will Delta VFD-m1 inverter connected directly with the host computer to facilitate the realization of distributed control. VB man-machine interface through the converter to achieve distributed network control, the application of RS-485 bus architecture can be realized up to 32 inverters control
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Size: 158720 |
Author: hjjhjh |
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Description: VB做的RS484通讯程序源代码，完成PC与外围设备的通讯-VB to do the RS484 communication program source code, complete PC and peripheral equipment, communications
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Size: 2048 |
Author: bruce |
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Description: vb语言开发的串口通信，可实现拨号传送文件等-vb serial communication language development, enabling the transmission of documents, such as dial-up
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Size: 14336 |
Author: jo |
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Description: RFID_VB源码_RFID读写
提供了RFID的开发源码，用VB编的，串口通讯支持RS-232(RS232)，RS-485(RS485)，波特率可选,RFID的天线可选，读卡频率可调。提供了控制RFID读卡功率的方法，功率从0至29可调，距离最大10米以上，该源码可用于交通、物流、运输、仓库管理、比条码技术强大。用于毕业论文答辩中，可以演示，程序看懂后，就对RFID整个工作原理较为了解。支持ISO18000和EPC_GEN2等类型的RFID卡。
-RFID_VB source yard _ RFID read-write has provided development RFID source yard , used VB to weave, string communication supports RS-232 (RS232) , RS-485 (RS485) , Porter lead may elect, RFID air wire but selections, read card frequency adjustable. Method having provided the power controlling RFID reading a card, power is from 0 to 29 adjustable, from when above 10 maximal rice , is the source yard s turn to may be used for traffic , logistics , transportation , storehouse, than the bar code technology is big and powerful. Be used to be able to demonstrate in the oral thesis defense graduating.
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Size: 695296 |
Author: 红信 |
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Description: 方便初学串口设备通信的朋友参考用作RS-232, RS-422, RS-485调试的程序， VB代码；
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Size: 4096 |
Author: 彭 |
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Description: 目前，在我国现场控制总线中，RS-485 使用最为普遍。RS－485 总线的共模输出电压在
-7V 至+12V 之间，具有抑制共模干扰的能力，数据传输速率最大为10Mbit/s，当波特率为1200bps 时最大的传输距离理论上可达15 千米。RS－485 网络所具有的设备简单、容易实现、传输距离远、维护方便等优点而被许多变频器厂家所采用。源码基于RS-485 变频器与PC 机串行通信的硬件特性，通信协议及软件实现，实验表明该通信软件稳定可靠，能直观的观看变频器的实际运行状态，并能比较方便的进行多组参数的设定和改写。通过此软件，极大的方便了工程师和客户对变频器的操控和掌握。本源码基于485串口通信的VB控制变频器，其控制电机的速度变化。-At present, in our country in the field control bus, RS- 485 using the most common. RS- 485 bus in the common-mode output voltage
7 v to+ 12 v, have the ability to inhibit common-mode interference, maximum 10 MBPS speed of data transmission, when the baud rate to 1200 BPS transmission distance theory can reach a maximum of 15 km. RS- 485 network of simple equipment, easy to implement, long transmission distance, convenient maintenance and been adopted by many inverter manufacturers. Source based on RS- 485 converter serial communication with a PC hardware features, communication protocol and software implementation, the experiment shows that the communication software is stable and reliable, can be intuitive to watch the actual running condition of frequency converter, and can be convenient for multiple sets of parameters setting and rewrite. Through this software, greatly convenient for engineers and customer manipulation and control of the inverter. The source based on 485 serial po
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Size: 3072 |
Author: 王先生 |
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