Monitoring Controls System meeting on May 10, 2005

Attendance:

Steve Hahn,John Yoh, JC Yun

News:

The shutdown schedule is not out yet. There is some rumour that it might start between August and November for 2 months. Now PULSA is the new Level 2 communication standard and it reduced dead time substantially during high luminosity runs.

ICICLE:

Margherita could not join the meeting. She sent a message on the Icicle status instead.

Hi,
sorry i won't be able to make it again.
The only thing i have to report is that i prepared the new tags
for new CPR (which will have actually new CP2 prefix) in oracle;
also i have prepared a class to read them from CLC1 ; so i will test
whenever the tags are available in the ifix CLC1 db.
Thanks, please let me know if you have any special questions.

MUON3:

We did not hear from Yeongdae recently. We hope he could get back to the upgrade work as soon as possible.

PLUG:

They replaced a bad CAEN crate for SY527 recently. Now are out of spares. This is a serious problem since CAEN is not supporting SY527 series. We hope we could find some of these in FNAL or Universities.

VNODE:

After some tests over several weeks, JC installed a new version of heartbeat checking code (HB_scheduler_vnode1.grf) which runs as a background job. The major change has to do with error handling. In the old version, we used the command "On Error GoTo 0". This will skip the commands in the rest of the loop when error occurs. This made the code skip some important tasks when error occurred - although these kind of errors occur very rarely.

In the new version we switched to "On Error GoTo Next". This will make the excutable skip only the command line which is causing an error.

He also installed a start up picture called CDF_GbAlarms.HB.grf in Vnode2. When this window is running, it will check heart beat of Vnode1. When the Vnode1 database is not updating over 5 minutes, it will turn to red and sound an alarm.