Experimental Physics and Industrial Control System
Hi Jiří,
I am forwarding this email to our tech-talk mailing list as there are many
other people on the list with more experience than I have in building and
using EPICS on Win7 and with Modbus.
On your general points yes you can think of an EPICS IOC as a SCADA engine,
although being open we are a lot more extensible (and less standardized) than
most PLCs. It is important to be aware that we do not make any promises as
far as network security goes, EPICS traffic should be contained within a
strongly-firewalled network since DoS attacks are trivial to create and it is
easy to impersonate other users over the Channel Access protocol.
As you are already aware, the learning curve for EPICS is unfortunately rather
hard; there are a number of training presentations and even videos of past
courses available, but I'm not aware of any that would quickly address your
particular setup.
You can run the IOC code on Windows, you won't need RTEMS at all for what
you're wanting to do. There are a number of sites running EPICS inside VMs.
In both cases you will probably need to adjust your firewall settings to get
the network connections working properly though.
Tech-talk:
Can someone with more Windows 7 experience point Jiří in the right direction
for what he's wanting to do please.
- Andrew
---------- Forwarded Message ----------
Subject: request for config. steps
Date: Friday 02 March 2012
From: Jeřábek Jiří <[email protected]>
To: "[email protected]" <[email protected]>
Hi Andrew,
Sorry for inconvenience.
I am a novice with EPICS. I have extended SCADA, DCS, OPC, Modbus, PLCs
experience besides other.
I am not a comp.sci. specialist by my profession and have no practical
experience with Linux, C++, Perl and so on.
I have experience with physical instrumentation and industrial field
instrumentation.
If I am correct, I understand EPICS as a generalized, scalable, open SCADA
engine (without particular HMI)
As it is very diffcult, if not impossible, for me to acquire within a short
period necessary knowledge by self-study only, I decided to address you
for a basic navigation help with setting an EPICS client and building an
IOC. Maybe a hand drawn flow diagram would be initially sufficient.
I do not request detailed cookbook at all even asking for some details
anyway.
I would like to build a small setup having:
* Two notebooks with Win7
* A small „Modbus.exe“ simulator with Modbus TCP protocol.
The aim is to access for simplicity only one holding register in the Modbus
simulator and say only for “Read” operation.
As I understand by now, the IOC should be created/built in my situation
on one notebook (including a local EPICS Client), the second one would
support only the Modbus simulator application.
Could you please to give me a rough itemized set up skeleton for sequence
of implementation steps?
* What to do first, second , etc?
* What to study to go across particular steps?
* How to build/install an EPICS client (I want to have only one field
shown, exactly with the Modbus register).
* How to build an appropriate IOC and a its database?
Am I able to build the EPICS stuff under Win7 or it would be necessary to
boot the notebook with other OS, to use RTEMS or so…?
I have no idea…
Btw. are anywhere instructions for using virtual machines? My experience
is that there could be a problem with network card incompatibility for
particular combination of virtual machine vs PC NIC .
With best regards,
Jiri
Jiri Jerabek
SCADA specialist
www.fzu.cz<http://www.fzu.cz>
www.eli-beams.eu<http://www.eli-beams.eu>
-----------------------------------------
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Never interrupt your enemy when he is making a mistake.
-- Napoleon Bonaparte
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