We need help for a Mitsubishi PLC FXon-24 MR-ES if the PLC is still working, it is use for more than 10 years for a revolving door. The PLC is connected to a frequency inverter and a motor. It is operational but the PLC shuts off after 3-4 minutes of use. The PLC I/O led lights flickers and then stops. It will be operational again when we turn on the system again after 5 -10 minutes from shut off. Are there any connections we need to check to the I/O of the PLC? Thank you for your help.