g+
g+ Communities
Argonne National Laboratory

Experimental Physics and
Industrial Control System

1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  <20122013  2014  Index 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  <20122013  2014 
<== Date ==> <== Thread ==>

Subject: Re: streamDevice Exception Handler Question
From: Dirk Zimoch <dirk.zimoch@psi.ch>
To: tech-talk@aps.anl.gov
Date: Mon, 19 Nov 2012 17:48:24 +0100
On 15.11.2012 15:33, Martin L. Smith wrote:
When using steamDevice exception handlers and in particular the
replytimeout and readtimeout handlers, what would one normally
do in these handlers?

Probably send something to the device to reset it. Not much that would help EPICS. I once used it to change the baud rate because the device always started with a slow baud rate after power on.


For a mismatch I simply get whatever the received data was and put
that in a string record for display so that I know that something
went wrong ... since the error messages are now suppressed from this
error.

Are they? They should be suppressed for "I/O Intr" records only. I will check. A mismatch handler allows you to re-parse the input. But the other handlers don't.


Is it possible to set a PV to a value without using an "in" command?
Or would I simply look at the STAT field of the record using the protocol
to know that something happened in the case of a timeout error?

Unfortunately I have no way (so far) to set PVs to some constant value. but perhaps....: in "%#{=17}"; would probably set the value 17 independently on the input, but only if there is any input.

Dirk



Thanks,
Marty



References:
streamDevice Exception Handler Question Martin L. Smith

Navigate by Date:
Prev: Re: channel archiver on 64 bit? Re: archive data server Ralph Lange
Next: Re: EPICS on SL6.x Andrew Johnson
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  <20122013  2014 
Navigate by Thread:
Prev: streamDevice Exception Handler Question Martin L. Smith
Next: DB Question Szalata, Zenon M.
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  <20122013  2014 
ANJ, 18 Nov 2013 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· EPICSv4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·