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| <== Date ==> | <== Thread ==> |
|---|
| Subject: | Re: LabVIEW EPICS connection |
| From: | "Steve Kinder" <[email protected]> |
| To: | <[email protected]>, <[email protected]> |
| Date: | Thu, 28 Jun 2012 12:01:51 +0100 |
|
Hi Ulrik
Thanks for the reply. Yes I had seen that exchange. It was a while ago and
not the same thing I have installed although I suspect actually the same
contents. I also wasn’t quite sure how that ended up.
I agree with the general points you make regarding the add-on. It is
interesting, and may well be important for me to know, that the array/waveform
didn’t work. I am verging on trying CA Lab for sure.
It would still be good to get the LabVIEW add-on working. I know it was
some time ago but do you remember what you used for the URL in for the Create
EPICS Client VI?
Cheers
Steve
From: [email protected]
Sent: Thursday, June 28, 2012 11:26 AM
Subject: RE: LabVIEW EPICS connection Hi
Steve, A
while ago (a couple of years) I went through this process and tried out a few
different EPICS-LabVIEW integration libraries. My first choice was also this NI
supplied LabVIEW add-on. However, I had trouble getting this working
well: ·
There
is a significant lack of documentation even to help you get started, let alone
to understand how it does Channel Access I/O. ·
I
have had some trouble to get the add-on installed and working – and others have
reported the same. See http://www.aps.anl.gov/epics/tech-talk/2010/msg00277.php ·
Once
running I found that I couldn’t get array/waveform to work (possibly not
supported at all) ·
Setting
up shared variables is far too complicated for some of our novice LabVIEW
users I
had a lot better experience with the CA Lab library http://www-csr.bessy.de/control/SoftDist/CA_Lab/
This worked straight out of the box for me and the documentation is excellent to
get you started. Also it uses the native EPICS ca and Com libraries and makes
the source code available so you can understand how it really works. I recommend
going with that for any new project. Cheers, Ulrik From:
[email protected] [mailto:[email protected]] On
Behalf Of Steve Kinder I am
trying to connect an existing LabVIEW VI to EPICS via the freely available
LabVIEW add-on EPICS Client I/O Server (http://joule.ni.com/nidu/cds/view/p/id/2533/lang/en).
I am running LabVIEW 2011 and have a 3-14-11 soft IOC running on the same system
with a few test PVs. My first aim is to make a connection between these PVs and
elements of the LabVIEW VI (currently just a test VI). I wondered whether anyone
had successfully used this LabVIEW add-on or the full version as in the DSC/RT
add-ons and could offer me advice on how to make the
connection. I have
the following in my test LabVIEW VI; Create EPICS VI, Deploy EPICS Client VI and
List Records VI. I was hoping that the latter would display a list of records in
my soft IOC if the connection had been established. I get no errors but it
doesn’t seem to display any records. Any
advice would be appreciated, perhaps including whether I should be trying to use
this LabVIEW add-on or one of the other options e.g. CA Lab or the Oak Ridge CA
client. Many
Thanks Steve |