td8  releases 19may12

19may12

    On 19may12 td 8 started having trouble. It turned itself off a few times in the morning. Later when all the tiedowns had been stopped, td 8 started to release..

Plots were made of the time when td 8 release. The status of td12 is also shown for comparison.

td8 releases (.ps) (.pdf)
td12 during td8 release  (.ps) (.pdf)

• td 8 started moving at the dashed vertical lines. All 3 tiedowns were in stop mode when this occurred.
• some lines were having glitches before the motion:
• The bit reference below count from 0.
  
• Little star digital input:
• Bit3 PcuCtrl.
  
• Uio1
• Bit11 alarmRelay
• Little start digital out:
• Bit5 strbLt
• Bit7 Alarm
• These may have been response to the input bits varying.
• 
  
• The motion occurred because the watchdog input uio1 bit 7 started to glitch.
• This may have been a problem with the  watchdog or with the input bit.
• Once the watchdog started glitching, uio1 brkoffcm, brkoffmon started to move. this may have been in response to the watchdog bit changing..