You need to run #ipmitool sdr elist. This will list out the IPMI sensor names and their sensor ID.

Then you use #ipmitool event to trigger an event. ipmitool comes with three generic event, voltage error, overheat, and ECC error. You can trigger these with #ipmitool event 1 (or 2, 3).

Then check #ipmitool sel list, or in the web browser GUI under system event log. For specific sensors, like FAN1, you would run #ipmitool event FAN1 ucr for example. This will trigger a FAN1 upper critical asserted error in the SEL.