Re: Skip updating an output link in aSub ?

["Roehrig, Christian" <roehrig@aps.anl.gov>]

Hi Lingyun,

    I had the same problem.  I used a sequence record as an intermediary to write the values from the aSub record and I used one of the outputs from the aSub record to write to the sequence record’s mask so that I could easily change which links in the sequence record were processed based on the aSub inputs.

Chris Roehrig

From: <tech-talk-bounces@aps.anl.gov> on behalf of Lingyun Yang <lingyun.yang@gmail.com>
Date: Thursday, January 14, 2016 at 10:59 AM
To: Andrew Johnson <anj@aps.anl.gov>, "priller@frib.msu.edu" <priller@frib.msu.edu>
Cc: "tech-talk@aps.anl.gov" <tech-talk@aps.anl.gov>
Subject: Re: Skip updating an output link in aSub ?

Thank you all for the help.

Unfortunately this aSub is outputing both "calculation" and "action". So I want to forward the "calculations"  but inhibit the actions.

This all/none solutions does not work for me.

Using calcout as Kay said should work. Although I need to write hundreds of them after splitting a waveform to individual PV,  It seems have some flexibility.

Lingyun
 

On Thu, Jan 14, 2016 at 11:21 AM, Andrew Johnson <anj@aps.anl.gov> wrote:

On 01/13/2016 09:43 PM, Michael Davidsaver wrote:
>> Is there anyway skip updating any/some of the output PVs in the aSub
> routine ?
>
> Nope sorry.  At least no directly.

Wrong; as John Priller pointed out (the Wiki documentation indirectly
explains this, but isn't terribly clear about it) returning a non-zero
value from the subroutine tells the record not to put the output links.
The aSub record sometimes does things a bit differently than the other
record types...

- Andrew

--
There are only two hard problems in distributed systems:
  2. Exactly-once delivery
  1. Guaranteed order of messages
  2. Exactly-once delivery
 -- Mathias Verraes

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Lingyun YANG
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