摘要
根据数字墙实际的显示特点,提出一种数字墙显示系统的设计方案。在显示侧配置数码管驱动电路板,电路板通过485总线接收计算机传送的显示信号,进而驱动数码管显示。计算机上的数据传送程序由VB6.0编写,通过DDE从监控软件获得显示量的实时值,并定时向每个数码管发送数据显示报文,每个数码管显示的内容及格式均可定义。数据传送程序运行在操作员站上,不需要专门的计算机,成本低,维护方便。
According to the display characteristics of digital wall, a design scheme of digital wall display system is proposed. LED driving circuit board is used at the display side. 485 bus is used to transmit display signal from the computer to the board and drive the LED display. The data transmit program is program under VB6.0. Through DDE, the real time value of display is got and the data display message is sent to the LED. The message and format of every LED display could be set. The data transmit program runs in the operator station without special computer. The advantages of the system are low cost and easy to maintenance.
出处
《自动化应用》
2012年第9期35-37,共3页
Automation Application
