一个用于测试富士G11/P11变频器通讯的小工具，在调试富士变频器RS485通讯时很有帮助。它可以读写转速以及频率，还有对输入输出的字符进行记录。

-a test for Fuji G11/P11 small inverter communication tools, Fujitsu Inverter debugging RS485 communication helpful. It can read and write speed and frequency, and the input and output of the characters recorded.