Experimental Physics and
Industrial Control System

Ron Rechenmacher <[email protected]> · Mon, 12 Nov 2007 15:35:26 -0600

Hi Andrew,

[email protected], Fri, 09 Nov 2007 15:09:47 -0600, said:
> Was your message sent because you are currently experiencing problems  with
> CA for which you need to watch the wire traffic? 

I was not actually experiencing problems with CA, but the problem in general
is how to synchronize data from CA and other sources, where there is a 
significant push to see if something other than "time of day" could be used as
the basis for synchronization. I wanted to have an assurance that I knew what 
information the channel archiver was collecting (or could possible be 
collecting) by looking at the information it was collecting over the network.
So, I fired up my version of ethereal with the dissector I did long ago.
I was quickly able to see (confirm) that the DBR_TIME_DOUBLE information
was being sent.

With my background, with the way I think, and with my general level of 
non-experience with CA, this was the most direct way for me to know for sure 
what info the archiver was collecting -- and ethereal really can organize the
information clearly.

Then I thought I should finally search tech-talk for "protocol dissector" 
because I, by this time, had gained familiarity with tech-talk.

--Ron

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System