Re: [foxboro] PLB ladder running in FBM? Plus, disappearing files

On Wed, Sep 24, 2008 at 03:13:46PM -0400, Mike_Adams@xxxxxxxxxxxxx wrote:
> System: old-school nodebus at v7.1.1 running AW51G boxes and CP30s.
> 
> Situation: I have a 100-series FBM whose .p file disappeared from the
> /opt/fox/ciocfg/<compound_name> directory.  I don't know how that happened.
> I can't see the ladder from the PLB's detail display, and of course the
> ladder appears blank when looking at it through the ICC.  I found a saveall
> from about 3 weeks ago that turned out to have the .p file in it, and I
> copied that file to /opt/fox/ciocfg/<compound_name>, so now I can see the
> ladder properly in the ICC but not on the detail display.  The FBM looks
> fine in Sys Management.  The PLB's detail display shows some IFLs and OFLs
> lit up and other not, and there's no cyan/smurfing present on either the
> detail display or process display elements linked to this PLB.  The PLB
> detail display's faceplate says "Logic = On-Line".
> 
> The .i, .r and .s files for sequence blocks in the same directory are also
> missing but  I will burn that bridge when I get to it.
> 
> Question #1: how do I know if the FBM is actually executing a "real" copy
> of the ladder and not just an empty ladder?  I know I could compile and
> re-insert my restored ladder via ICC but the process is online and I don't
> want to disrupt the timing and one-shot functions of the ladder if it's
> already running OK in the FBM.  Rebooting the Matrix usually causes
> problems.

Is there some change you can make that will not adversly affect the
process, but will rsult in an obviouus state change of something?
> 
> Question #2: how can PLB and sequence files just disappear from
> /opt/fox/ciocfg/<compound_name> but the blocks be running OK per the
> process and detail displays?
> 

Most liekly, a slip of a finger on the keyboard. It _does_ happen, and
since in Foxboro land everyone runs as root, no questions are asked :-(

-- 
One of the main causes of the fall of the roman empire was that, lacking
zero, they had no way to indicate successful termination of their C
programs.
 
 
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