SLLSFU1A December 2023 – July 2024 MCF8315C
PRODMIX
An error during resistance and inductance measurement is reported using MPET_IPD_FAULT. The MPET_IPD_FAULT gets triggered when the IPD timer overflows due to unsuccessful attempt to ramp up the current to the threshold value, same as explained in Section 6.3.23.14. The fault typically gets triggered when there is no motor connected to MCF8315C or when the MPET IPD current threshold is set high for motors with high resistance.
An error during BEMF constant measurement is reported using MPET_BEMF_FAULT. This fault gets triggered when the measured back EMF is less than the threshold set in STAT_DETECT_THR. One example of such fault scenario can be the motor stall while running in open loop due to incorrect open loop configuration used.