David,
> -----Original Message-----
> From: D Wetherholt [mailto:[email protected]]
> Sent: Friday, May 28, 2004 10:29 AM
> To: [email protected]
> Subject: EtherIP & AB PLC's
>
> If anyone has any experience with the EtherIP driver, I was wondering
> if they have run across the same problem I have described below. I am
> using it with a r3.13 release of EPICS, mv177 front-end, HPUX 11
> back-end.
>
> The EtherIP driver is installed and appears to be talking correctly
> across the ethernet to an Allen Bradley Logix555 PLC. I am reading and
> writing DINT's, but the rather simple operation of writing a "0" to a
> BOOL tag does not seem to be working. It's tied to a choice button
> through MEDM (also tried a momentary button, and even a "dbpf" from the
> command prompt). On the other hand, it's writes a "1" fine. Has anyone
> experienced this and/or know what the "fix" is?
At SSRL we have been using Kay's EtherIP driver for two years. The first version we tried was v1.3 built with EPICS base 3.14.1beta0 and Tornado 2.0.2 where we saw a problem similar to yours: a bo record writing a zero to a BOOL tag would change the tag briefly, but the driver would soon set it back to 1. An ao writing to the same tag would write fine. The problem went away with version v1.4. We are currently up to version 1-11.
--Harvey Rarback
- Navigate by Date:
- Prev:
CVS vulnerability Jeff Hill
- Next:
help building StripTool and caSnooper under EPICS R3.14.6 Kevin Tsubota
- 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:
EtherIP & AB PLC's D Wetherholt
- Next:
CVS vulnerability Jeff Hill
- 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
|