This is the DC-input counterpart to tsiModuleACInStatus, giving a granular numeric event code for this module's DC input condition beyond the simple three-state assessment reported by tsiModuleDCInState. When the coarse status just shows a failure, this code can tell a technician the specific nature of that DC failure, such as a low battery voltage versus a completely disconnected string. A field technician preparing to visit a site with a failed DC input would want this specific event code in hand to bring the right replacement parts rather than a generic DC-input-failed description.