Experimental Physics and
Industrial Control System

"Lahey, Terri E." <[email protected]> · Thu, 5 Aug 2004 17:44:44 -0700

In the SLAC accelerator control system, we have seen a similar problem. We see that after awhile, a SEVERITY is not being updated (the value is constant, so we can't comment on that). The SEVERITY returned by the IOC changes, but the PV Gateway does not return the changed value. Restarting the CA Gateway fixes the problem, and then changes to SEVERITY are visible through the PV Gateway again.

We are running on Solaris using PV gateway 2.0.0.0Beta11 compiled with R3.14.6. We see the same problem when we compile the PV gateway with the gnu or solaris compiler. Our IOC is running R3.13.6, and the UNIX client is DM (R3.13.2) and caget (R3.13.2).

I think we see failures in SEVERITY returned by the PV gateway after the PV gateway connects to a very large number of PVs, eg. 17000 PVs. Is there some maximum number of PVs that we should support with the PV Gateway?

Is this possibly a problem with mismatch of EPICS versions running on the CA client, CA gateway, and IOC?

Dirk, Are you running on Solaris or Linux?  What version of EPICS is on your IOCs? And what version of EPICS are the clients that are connecting to the PV gateway?

Terri Lahey

> -----Original Message-----
> From: Dirk Zimoch [mailto:[email protected]] 
> Sent: Thursday, August 05, 2004 5:07 AM
> To: TECHTALK
> Subject: CA Gateway problem
> 
> Hi,
> 
> I'm using CA gateway 2.0.0.0Beta8 compiled with R3.14.6 to read records 
> from another subnet. Now I found that one enum has the wrong value 
> though the gateway. It is a bi with the two states "OK" and "ERROR". The 
> record was on ERROR for weeks, but when it changed to OK, I could not 
> see the change through the gateway! The severity however is correct, it 
> went from MAJOR to NO_ALARM. All other records on the same IOC seem to 
> be OK. I have checkes that there is no second record with the same name. 
> What's wrong?
> 
> Dirk
> 
> -- 
> Dr. Dirk Zimoch
> Swiss Light Source
> Paul Scherrer Institut
> Computing and Controls
> phone +41 56 310 5182
> fax   +41 56 310 4413
> 

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System