This read-only CwrCwErroredSecond value reports the cumulative Codeword Errored Seconds detected since link power-up, as captured at the timestamp recorded in cwr1HrUpdateTime. It gives an admin an hourly-resolution errored-seconds figure for building a more detailed timeline than the daily entry provides. For example, an admin investigating an intermittent problem would compare consecutive cwr1HrErroredSeconds entries to identify which specific hour saw the error spike.