RE: Question on Generating Messages

["Chestnut, Ronald P." <ronc@slac.stanford.edu>]

Dear Robert,

Included is a little sequence program I put together to monitor two different error reporting strings and put them in a scrolling list (really an array of string PVs), along with timestamps. This, along with a little EDM display, provides a scrolling list of errors. This works great with a slow data feed - it won't do well in a faster environment.

Ron Chestnut 

-----Original Message-----
From: tech-talk-bounces@aps.anl.gov [mailto:tech-talk-bounces@aps.anl.gov] On Behalf Of Robert Horrox
Sent: Friday, September 14, 2007 10:50 AM
To: tech-talk@aps.anl.gov
Subject: Question on Generating Messages

Greetings,

I am having trouble finding a way to report information back to an operator at an EDM display.  In our control system we have several IOC's, each of which can generate strings that need to be displayed to the operator like, "Beam On" and "Vacuum Pump Failure" etc.  Initially I was going to write these messages to a PV that is read by a message box in EDM.  My problem is if two many messages are written to that PV they disappear.  Is their a way to queue up channel access puts or is their another way I can handle generating this messages and displaying them back to an operator.

Thank you everyone for your time,

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Robert Horrox
University of Washington Medical Center
Department of Radiation Oncology

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