This read-only CwrCwConsecutiveSevErrSecond value reports the cumulative Codeword Consecutive Severely Errored Seconds detected since link power-up, as captured at the timestamp recorded in cwr1HrUpdateTime. It gives an admin an hourly-resolution figure for the most serious sustained-error class of event, more granular than the daily cwr24HrConsecSvErrSeconds entry. For example, an admin isolating the exact hour of a sustained severe outage would look for the hour whose cwr1HrConsecSvErrSeconds entry is nonzero.