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Message ID: 1510     Entry time: Thu Apr 23 16:35:23 2009
Author: Yoichi 
Type: Summary 
Category: Computer Scripts / Programs 
Subject: restoreWatchdog script 
When the IFO loses lock during the lock acquisition steps, it often kicks the MC2 (through the CM servo) and trips the watchdog.
I wrote a script to restore the tripped watchdog (/cvs/cds/caltech/scripts/SUS/restoreWatchdog).
The script takes the name of a mirror (such as MC2) as an argument.
It will enable the coils and temporarily increase the watchdog threshold to a value higher than the current OSEM RMS signals.
Then it will bring the watchdog back to the normal state and wait for the mirror to be damped. After the mirror is damped enough, the
watchdog threshold will be restored to the original value.
The script will do nothing if the watchdog is not tripped.
I put this script in the drdown_bang so that the MC2 watchdog will be automatically restored when a lock loss kicks out the MC2.
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