Experimental Physics and
Industrial Control System

Mark Rivers <[email protected]> · Tue, 22 Jan 2013 14:48:08 +0000

Hi Hinko,

> I was expecting that $(P)ElapsedRealTime would hold some other time 
> value - maybe cumulative for all MCA channels..

That PV holds the maximum elapsed real time for any channel.  The calculation is done at line 2821 in NDDxp.cpp:

           getDoubleParam(i, mcaElapsedRealTime, &realTime);
           realTime = MAX(realTime, dvalue);

> Also since the 16element_dxp.adl looks like a "top" level panel, for 
> controling 16 detector channels, why would we need to make a separate 
> instance of it (according to dxpDoc.html) for each detector channel?

It is a top-level panel and you don't need to make a separate instance of it for each detector channel.  I searched dxpDoc.html for the string 16element_dxp.adl and I don't see any mention of making separate instances of it.  Can you please send me the text that you are referring to?

Thanks,
Mark

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Hinko Kocevar
Sent: Tuesday, January 22, 2013 7:20 AM
To: Tech Talk
Subject: DXP ElapsedRealTime

Hi,

I'm trying to understand how the counting of Elapsed Real Time is done 
in the $(P)ElapsedRealTime record found in dxpHighLevel.template and 
seen on 16element_dxp.adl panel.

I can understand that each MCA record (seen in the mca_simple.adl) 
counts its own Elapsed real time in the .ERTM field.

I was expecting that $(P)ElapsedRealTime would hold some other time 
value - maybe cumulative for all MCA channels..

Also since the 16element_dxp.adl looks like a "top" level panel, for 
controling 16 detector channels, why would we need to make a separate 
instance of it (according to dxpDoc.html) for each detector channel?

Best regards,

--
Hinko Kocevar

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System