Chris (Apollo), Jonathan, Patrick

As part of the upgrade to the FMCS control system last week by Apollo, the subnet masks of the BACnet devices were changed from 255.255.255.0 to 255.255.0.0. The subnet mask of the computer running the BACnet to EPICS IOC has been 255.255.255.0. This needed to be changed to 255.255.0.0 to match the change to the BACnet devices. Jonathan and I did so this morning and this allowed the IOC to connect to the BACnet devices again. There are two more BACnet devices that Apollo still needs to change to 255.255.0.0. One is associated with the filter cavity station air handlers, the other to the LExC building. We do not translate any of the BACnet channels from the LExC building to EPICS, but we do for the filter cavity.

The IOC was restarted a few times during this troubleshooting with permission from the operator.