EPICS Controls 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  <20102011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024  Index 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  <20102011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024 
<== Date ==> <== Thread ==>

Subject: RE: Channel Access Writes Failed on Asyn Record Writable Fields
From: "Mark Rivers" <[email protected]>
To: "William Lu" <[email protected]>, <[email protected]>
Date: Tue, 15 Jun 2010 15:15:23 -0500
I am not sure what the problem is, but here are some ways to find out:

- Load the medm screen for the asyn record (asynRecord.adl).  You can
then interactively send commands to the port and observe the response
and any error status.

- The asyn record has an error string field (.ERRS) which may contain
useful information.

- Execute the following iocsh command to get all the record field
values:
dbpr LS450PS:asyn 5

- Enable all debugging on that asyn port with the following iocsh
commands

asynSetTraceIOMask sockserv 0 0x2
asynSetTraceMask sockserv 0 0xff

Then do your caput again or type in the asyn records .AOUT text widget
and see if there is useful information in the output.

Mark


-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of William Lu
Sent: Tuesday, June 15, 2010 2:40 PM
To: [email protected]
Subject: Channel Access Writes Failed on Asyn Record Writable Fields

I am having problems with channel access writes on asyn record's 
writable fields such AOUT and PORT.  I created the following asyn tcp/ip

port and the asyn record:

In a startup iocsh script:
  drvAsynIPPortConfigure("sockserv","127.0.0.1:9099",0,0,0)

The asyn record:
  record(asyn, LS450PS:asyn) {
  field(DTYP, "asynRecordDevice")
  field(PORT, "sockserv")
  field(ADDR,"0")
}

After the record has been loaded to the ioc, I cannot write the AOUT or 
PORT fields of the record through channel access.  When I caput on those

fields, I got the error messages like the following:

 >caput LS450PS:asyn.AOUT "abc"
Old : LS450PS:asyn.AOUT
CA.Client.Diagnostic..............................................
    Message: "Could not perform a database value put for that channel"
    Severity: "Warning" Context: "detected by: devl17.acc.jlab.org:5064 
for: LS450PS:asyn - with request chan=LS450PS:asyn.AOUT op=1 data 
type=DBR_STRING count=1"
..................................................................
New : LS450PS:asyn.AOUT

What is the problem?  Any help would be gratefully appreciated.

William Lu
Jefferson Lab

-- 
Weiwei Lu
757-269-7476
[email protected]



Replies:
Re: Channel Access Writes Failed on Asyn Record Writable Fields William Lu
References:
Channel Access Writes Failed on Asyn Record Writable Fields William Lu

Navigate by Date:
Prev: Channel Access Writes Failed on Asyn Record Writable Fields William Lu
Next: Re: Channel Access Writes Failed on Asyn Record Writable Fields Ralph Lange
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  <20102011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024 
Navigate by Thread:
Prev: Channel Access Writes Failed on Asyn Record Writable Fields William Lu
Next: Re: Channel Access Writes Failed on Asyn Record Writable Fields William Lu
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  <20102011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024 
ANJ, 02 Sep 2010 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·