EPICS Home EPICS Controls Argonne National Laboratory

Experimental Physics and
Industrial Control System

Format page
for printing


Search Tech-talk
1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  <2007>  2008  2009  2010  2011  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  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024 
<== Date ==> <== Thread ==>
Subject: Re: Ethernet/IP Device Support and CompactLogix
From: "Mike Forster" <[email protected]>
To: "Kay-Uwe Kasemir" <[email protected]>
Cc: John Dobbins <[email protected]>, EPICS Tech-Talk <[email protected]>
Date: Fri, 29 Jun 2007 16:21:51 -0400
Hi folks,
Just an update on our EtherIP with CompactLogix use:
We are communicating smoothly with the PLC at this point after sorting out an anomaly.

We saw that when a record scan list became long (too many records with the same scan rate), all the elements in that scan list would stop responding.  Eventually we traced this down to the EIP_buffer_limit which was the default 500.  This limit at 500 allows data to be sent that is 554 bytes long.  After some trial and error we found that the PLC responded correctly if the data sent was 548 bytes long or less.  When we set EIP_buffer_limit to 494 our problems went away.

Mike Forster with John Dobbins
LEPP
Cornell University
Replies:
Re: Ethernet/IP Device Support and CompactLogix Kay-Uwe Kasemir
Navigate by Date:
Prev: Re: PV save and restore tool sought Thomas Birke
Next: Re: Ethernet/IP Device Support and CompactLogix Kay-Uwe Kasemir
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  <2007>  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024 
Navigate by Thread:
Prev: Re: asyn record support - output Marty Kraimer
Next: Re: Ethernet/IP Device Support and CompactLogix Kay-Uwe Kasemir
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  <2007>  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024 
ANJ, 10 Nov 2011 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·