Argonne National Laboratory

Experimental Physics and
Industrial Control System

1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  <20092010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  Index 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  <20092010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021 
<== Date ==> <== Thread ==>

Subject: Re: Remote I/O
From: Stephen Lewis <stephenalewis@me.com>
To: nick.rees@diamond.ac.uk
Cc: tech-talk@aps.anl.gov
Date: Wed, 16 Dec 2009 11:11:31 -0800
At LCLS (SLAC) are successfully using the Beckhoff hardware.  Price is reasonable, the modularity is right, and there is a good selection of I/O.  In particular, I have a lot of thermocouples distributed around.


On 16Dec2009, at 4:44 AM, nick.rees@diamond.ac.uk wrote:


At Diamond we are considering what to use for the next generation of
discrete I/O. Currently we have a lot of VME based hardware, but we are
considering a good architecture for a Linux world.

The model that we are considering is a soft IOC on a Linux system
communicating over Ethernet using an open, industry standard protocol to
distributed DIN-Rail mounted I/O points. These I/O points take in
Ethernet and are powered from a 24V bus that will run around the
hardware area.

This eliminates any dependence on a specialized bus architecture (apart
from Ethernet) on the Linux system, so they can be commodity PC's, and
hopefully allows us to use widely available, cheap, industrial modules
for I/O. It will not completely replace all of the requirements
currently serviced by VME, but would be able to satisfy most of them,
with the remaining few being serviced by the occasional VME system (or
FPGA, or some other bus, or something else entirely in the future...).

This email is to poll the EPICS community as to the experience people
have had, and recommendations for and against.

The sort of thing we have identified are:

1. Modbus/TCP based modules, such as the Acromag Busworks series
http://www.acromag.com/models.cfm?Product_Function_ID=28&Category_ID=22&
Group_ID=2
2. EtherCAT base modules, such as those from Beckhoff:
http://www.beckhoff.com/
3. Standard PLC systems where (as distinct from the other two), you
take Ethernet to a PLC controller which then has a series of modules it
talks to in a variety of possible ways.

So, is anyone willing to share their experiences with these or similar
systems,



Stephen Lewis
650.926.3791 (office)
650.926.7963 (beamline)
510.504.1231 (mobile)
510.655.6616 (home)
  ___o 
 _`\ <,_
(_)/  (_)   


Replies:
RE: Remote I/O nick.rees
References:
Remote I/O nick.rees

Navigate by Date:
Prev: Re: Remote I/O David Dudley
Next: Re: Remote I/O Kazuro FURUKAWA
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  <20092010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021 
Navigate by Thread:
Prev: RE: Remote I/O Mark Rivers
Next: RE: Remote I/O nick.rees
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  <20092010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021 
ANJ, 31 Jan 2014 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·