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,
Cheers,
Nick Rees
Principal Software Engineer Phone: +44 (0)1235-778430
Diamond Light Source Fax: +44 (0)1235-446713
--
This e-mail and any attachments may contain confidential, copyright and or privileged material, and are for the use of the intended addressee only. If you are not the intended addressee or an authorised recipient of the addressee please notify us of receipt by returning the e-mail and do not use, copy, retain, distribute or disclose the information in or attached to the e-mail.
Any opinions expressed within this e-mail are those of the individual and not necessarily of Diamond Light Source Ltd.
Diamond Light Source Ltd. cannot guarantee that this e-mail or any attachments are free from viruses and we cannot accept liability for any damage which you may sustain as a result of software viruses which may be transmitted in or with the message.
Diamond Light Source Limited (company no. 4375679). Registered in England and Wales with its registered office at Diamond House, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, United Kingdom
- Replies:
- Re: Remote I/O Matthias Clausen
- Re: Remote I/O David Dudley
- Re: Remote I/O Andreas Balzer
- RE: Remote I/O Mark Rivers
- Re: Remote I/O Stephen Lewis
- Re: Remote I/O Kazuro FURUKAWA
- Re: Remote I/O Bruce Hill
- Re: Remote I/O Dave Reid
- Re: Remote I/O Chris Timossi
- Navigate by Date:
- Prev:
RE: displaying areaDetector Video with EDM or MEDM Mark Rivers
- Next:
Re: Remote I/O Matthias Clausen
- 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
2025
- Navigate by Thread:
- Prev:
Alarm Handler and ForcePV_CALC Pierrick Hanlet
- Next:
Re: Remote I/O Matthias Clausen
- 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
2025
|