This read-only CwrCwDegradedSecond value reports the cumulative Codeword Degraded Seconds detected since link power-up, as captured at the timestamp recorded in cwr1MinUpdateTime. Note this minute-level entry tracks degraded seconds rather than the degraded minutes tracked at the hourly and daily granularities, giving an admin a second-level view of quality dips within that minute. For example, an admin drilling all the way down from a day flagged for degraded minutes to the specific minute involved would check cwr1MinDegradedSeconds to see how many seconds within that minute were actually degraded.