The software's functions of RS232 serial communication between data acquisition equipment and computer, management of data-base and drawing of fault wave are validated by experiments.
最后通过实验证实了上位机软件具有RS232串行通信、数据库管理和故障波形绘制的功能。
Through the serial communication with PLC in VB, the computer read the fault data stored in the PLC and display in figure.
在VB环境下实现计算机与PLC的串行通讯，读取PLC中保存的故障数据并用图形显示出来。
When an one-point or multi-point earth fault occurs, the monitor can quickly detect the serial number and polarity of the branch circuit earthed, and meantime give alarm to the operator on site.
在直流系统发生一点或多点接地时，该装置能迅速检查发生接地的直流支路编号及接地支路的极性，同时报警提示现场运行人员。
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