摘要
PLC设计的控制系统显示界面比较单调,一般通过观察控制柜上设置的指示灯或PLC本身的LED灯来了解控制仪的状态,对于像液位采集与控制之类的仪器仪表,这种显示界面远远不够。为了弥补PLC显示界面的不足,可以采用LED光柱显示器来扩展其显示功能。通过实际调试运行,选用MAX7219来驱动光柱显示器,与PLC之间采用串行方式通信,不仅占用PLC资源少,而且能满足实时监控的需要。
The display interface of PLC control system design is relatively monotonous. The state of the controller by observing the light of control cabinet or the LED lights of PLC. However,it is not far from enough for this display interface such as instrumentation of level acquisition. In order to compensate for the lack of PLC display interface, LED light beam display can be used to expand its display function. By means of practice debug,the chip MAX7219 is used to drive the light beam display and has serial communication with PLC. Not only occupying PLC＇s resources are little, but also real- time monitoring necessaries are meeted.
出处
《现代电子技术》
2008年第15期181-183,共3页
Modern Electronics Technique
