Frequency drive problem Posted on 2022-02-19 by Osamu Shigematsu Reply Today, I have checked the FGF frequency drive. The frequency drive could not switch to RUN. https://shigematsu.org/wp-content/uploads/2022/02/2022-02-19-13.12.40.mp4 It switches to RUN for a moment, but immediately returns to STOP. The photo of PLC status indicator lights follows: