Each ODC channel has a Summary Bit that is used to indicate whether each system is in a nominally good operating state.  This bit is generated by checking that the necessary bits in the ODC channel are ON, as specified by the subsystem commissioners.  With the input from Jeff Kissel and Sebastien Biscans, we have set all of the EPICS variables needed to correctly populate the Summary bits for all active ODC channels in H1.  The EPICS variable Bitmasks are decimal numbers that correspond to a bitmask, where for each bit in the ODC channel that should be on when the system it is characterizing is in a good working state.  Here is an example:
H1:SUS-BS_ODC_COMBINE_ODC_BITMASK = 126
In binary, this is 0111 1110, which indicates that bits 6, 5, 4, 3, 2, and 1 should all be ON when the SUS-BS is operating nominally.  If you are curious what those bits mean, you can do the following:

controls@opsws1:~ 0$ caget H1:SUS-BS_ODC_BIT1
H1:SUS-BS_ODC_BIT1             Master Switch ON/OFF Status
controls@opsws1:~ 0$ caget H1:SUS-BS_ODC_BIT2
H1:SUS-BS_ODC_BIT2             DACKILL Status

These BITMASK EPICS records were set using scripts located in /ligo/home/ryan.fisher, and attached to this entry (with modified file extensions so the alog will post them).

With this completed, the EPICS description strings for the bits set and the MEDM screens reworked, we believe we have most of the active SUS and SEI subsystem ODC channels operational.  

The remaining systems for which ODCs need to be implemented under SUS and SEI are: the HAUX (HAM-Auxilliary) front ends and the HAM-ISI front ends.  The latter should be implemented with the next update from the cds_user_app svn (anticipated Mar 15).

We will be generating new safe.snap files specifically for the updated ODC EPICS settings for all models and sending them to CDS-announce for incorporation into the SVN and live systems.