Re: Outputting a constant value

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

David Dudley wrote:

> Unfortunately, that didn't work.
> In vdct, I can set the .VAL field to 1, but when I load the db, the VAL
> field is 0.  Setting DOL to 1 causes it to have a 'CONSTANT 1' value
> when you do a 'dbpr' on the field, and I have OMSL set to 'closed-loop',
> however the .VAL field remains at 0.  If I do a forward link to the
> block, it outputs a zero, and the .VAL remains 0.  If a do a 'dbpf' to
> set the value to 1, it then works fine.  What I did as a patch around
> the questionable action was to use a BI block with its DTYPE set to
> 'Soft Channel' and an INP of '1' that is linked to the BO, but seems
> like a round-about way of doing such a simple thing.

Something similar happened to me just now.  I set VAL to 1 in vdct,
using the Inspector window, but did not hit return, and then immediately
saved the database.  I could close the Inspector window and reopen it,
and see that VAL==1 definition, and I could switch from one record to
another, and still see it, but the VAL==1 definition did not get written
to the database file.

However, if I hit return, in the Inspector window, and then saved the
database, the VAL definition did get written to the database file.

When I did get the VAL definition into the database, I saw it with dbpr.

I'm using a soft BO, by the way.

--
Tim Mooney (mooney@aps.anl.gov) (630)252-5417
Beamline Controls & Data Acquisition Group
Advanced Photon Source, Argonne National Lab.