RE: Use element of waveform as input to ai record

["Mooney, Tim M." <mooney@aps.anl.gov>]

Hi Phil,

I think you can do this with the subarray record, taking advantage of the fact that the scalar value
of an array is the value of its first element.  I haven't tried this, because I would in any case do it
with an acalcout record.  To write element 23 of myArray.VAL to myScalar.VAL, whenever myArray
is posted, I would do this:

acalc.INAA = "myArray.VAL CP"
acalc.CALC = "aa[23,23]"
acalc.OUT = "myScalar.VAL PP"

Tim
________________________________________
From: tech-talk-bounces@aps.anl.gov [tech-talk-bounces@aps.anl.gov] on behalf of Phillip Sorensen [pas37@cornell.edu]
Sent: Monday, September 09, 2013 4:16 PM
To: TechTalk EPICS
Subject: Use element of waveform as input to ai record

Hello all,

Sorry if this is obvious thing I have missed, but I am not finding any
obvious way to do what I am trying.

I would like the value of an ai record to be set to the value of an
element in a waveform, and update when the waveform up dates.

Thanks,

Phil Sorensen
CHESS