Experimental Physics and
Industrial Control System

Tim Mooney <[email protected]> · Tue, 28 May 2002 11:15:43 -0500

[email protected] wrote:
> 
> This is a warning about a change in base's behaviour that may cause
> unwanted side effects.
> 
>...
> The effect occurs when the calc/calcout is reading CA input links that
> are INVALID either because the CA link hasn't connected or it isn't
> granted read access by the source IOC.
>...
> after a reboot the first processing often occured before all inputs had
> been connected...

Yikes!  Initializing a database is hard enough without worrying about
links that haven't connected yet.  How about...

	case INITHOOKafterInterruptAccept :
		taskDelay(600);			<--<<
		break;

...in initHooks() ?  Am I right in thinking this would delay processing
caused by .PINI=="YES", and allow CA links some more time to connect?

You'd still want to do what you've suggested, of course, to defend
against links that really are broken.  But .PINI is pretty much useless
if it sometimes causes processing before databases that will eventually
be sound are ready to go.

-- 
Tim Mooney ([email protected]) (630)252-5417
Beamline Controls & Data Acquisition Group
Advanced Photon Source, Argonne National Lab

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System