Experimental Physics and
Industrial Control System

"Leicester, PJ (Pete)" <[email protected]> · Wed, 22 Apr 2009 18:14:30 +0100

Thanks Andrew and Stephanie. The addition of the CP flag does work as
far as I can see. It certainly seems ok from edm.

My one concern now is if I have a client using put callback to change
the mbbo record will it see the error state in the mbbo record or is the
callback complete before the SDIS MS CP updates the mbbi's error status.
Perhaps there is a race condition here? 

Pete

-----Original Message-----
From: Andrew Johnson [mailto:[email protected]] 
Sent: 22 April 2009 16:29
To: [email protected]
Cc: Leicester, PJ (Pete)
Subject: Re: back propagating error states

Hi Pete,

On Wednesday 22 April 2009 09:27:57 Leicester, PJ (Pete) wrote:
>
> I tried linking the SDIS from the mbbo to the longout record with 
> maximise severity set. This did make the mbbo reflect the longout's 
> error state but only after being processed a second time so is far 
> from ideal.

If you were to add a CP flag to that SDIS link it would cause the mbbo
record 
to get processed whenever the field it was pointing to changed.  I would

suggest pointing it to the SEVR field of the longout record, but make
sure 
that you also set the mbbo.DISV field to something outside the range
0..3.

I'm not 100% sure this will work, but I think it should.

- Andrew
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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System