free-port mode

常见例句

The system adopts single main-station to control the serial ports under free port mode.
系统采用单主站方式，在自由口模式下控制串口。
How to implement serial communication between S7-200 PLC and computer based on free port mode was described in detail in the paper.
详细介绍了在自由口模式下S7-200 PLC与计算机实现串行通信的方法，重点介绍了通信协议及其实现方法，并给出了编程实例。
This paper shortly introduces the network communicating function of S7-200 series PLC, gives the programming instance that use its free port mode to communicate with Modem.
本文简要介绍S7- 2 0 0系列PLC的网络通讯功能，给出了采用自由口模式与调制解调器进行通讯的编程实例。