Program execution error occurs when a program exceeds the internal memory capacity of the CPU module. The manual's first action is: “• Reset the CPU module and perform RUN. If the same error appears, the hardware of the CPU module may be malfunctioning. Consult your local Mitsubishi Electric representative.”
- Model
- Mitsubishi MELSEC iQ-F Series
- Display shows
- Program execution error (3E20H)
- Type
- Error code
- Source
- Manual p. 288
What 3E20H means
Program execution error p. 288
Common causes
- • A program larger than the internal memory capacity was written. p. 288
What to do
- • Reset the CPU module and perform RUN. If the same error appears, the hardware of the CPU module may be malfunctioning. Consult your local Mitsubishi Electric representative. p. 288
If 3E20H is still not resolved
The manual gives no further instruction for this code. Open the code table in the PDF or contact Mitsubishi service.
This page summarises what the manufacturer’s manual says about 3E20H; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Mitsubishi. Found a mistake? Report an error.