Experimental Physics and
Industrial Control System

"Dalesio, Leo" <[email protected]> · Thu, 17 Dec 2009 12:19:01 -0500

TRIUMF describes their interlocks in an RDB and generates the logic, tags, IOC database and screens from this RDB file. I think it's an interesting approach. We will shoot for the same thing using IRMIS.
I'll let you know if we also find it practical.
Bob

-----Original Message-----
From: Matthias Clausen [mailto:[email protected]]
Sent: Wed 12/16/2009 5:08 PM
To: Dalesio, Leo
Cc: Ralph Lange; EPICS Tech Talk
Subject: Re: Remote I/O

Hi Bob,

Dalesio, Leo wrote:
>
> This ability to define the PLC code and logic in ASCII was the primary 
> reason identified by David Dudley in our choice for AB over Siemens 
> and Yokogawa. Yokogawa has responded that they plan to add this ability.
>
> Matthias - are you saying that you can do this with the Siemens PLC? 
> Can you define the logic in ASCII as well?
>
I am sorry - it is not the logic itself but the memory layout of all the 
nodes on the Profibus (including the memory layout of the PLC) which we 
configure with a CSS tool. This generates a XML files which gets loaded 
to the IOC.
This was possible because we have the driver source code in our hands. 
Using the Siemens tools you will generate a binary file which will be 
loaded to the hardware board by some Windows DLLs - so no way to get 
this running on Linux or vxWorks :-(

Why would you want to cerate an ASCII file of the actual logic? Isn't 
this loaded via Ethernet to the PLC or burned into EPROM? Or are you 
loading the code to the PLCs via an IOC?
>
> The cost of keeping the PLC software in synch with the IOC was 
> considered significant.
>
There's a payload on both sides - the PLC and the IOC.
You need to map PLC-IO into the memory of the (PLC) communication 
controller and map another time the memory in the dual ported RAM on the 
IOC into EPICS record addresses. Both configurations (except the PLC 
program itself) can be handled with our solution.

Cheers
Matthias
>
>  
>
>
> -----Original Message-----
> From: [email protected] on behalf of Matthias Clausen
> Sent: Wed 12/16/2009 10:02 AM
> To: Ralph Lange
> Cc: EPICS Tech Talk
> Subject: Re: Remote I/O
>  
> Hi Ralph,
>
> Ralph Lange wrote:
> > On Wed 16 Dec 2009 8:16:17 Matthias Clausen wrote:
> >> Hi Nick,
> >>
> >> [...] In our case sensors and actors are directly connected to
> >> Profibus. The remaining I/O is connected through WaGo I/O with a
> >> Profibus controller. Profibus driver and configuration is available
> >> from us - even with redundancy support...
> >
> > Hi Matthias,
> >
> > is that using the 1996 IPAC-Profibus Interface that is listed in the
> > hardware support database on the EPICS web site?
> no - it's a new driver which support the Softing PC 104 cards. Softing
> is now producing also a Compact PCI card for us.
> There's a special firmware available which supports redundant Profibus
> connections and fail-over - in conjunction with the redundant IOC.
>
> Configuring Profibus (DP - or PA) is quite complicated. You have to map
> memory space of the I/O devices into the DPM on the IOC. So you need to
> configure your records's addresses in a way that they match with the DMP
> layout.
> We have developed a configuration tool in CSS which creates an XML file.
> (Like the Siemens 'Step 7' tool) This file is parsed on the IOC and
> creates the memory layout in the DPM. The EPICS records get their
> Profibus address from a reference in the configuration database. (When
> the db files gets created)
>
> We should finally write some documentation about it ;-))
>
> Thanks
> -Matthias
> >
> > Ralph
> >
>
>
> -- 
> ------------------------------------------------------------------------
> Matthias Clausen                         Cryogenic Controls Group(MKS-2)
> phone:  +49-40-8998-3256                Deutsches Elektronen Synchrotron
> fax:    +49-40-8994-3256                                    Notkestr. 85
> e-mail: [email protected]                           22607 Hamburg
> WWW-MKS2.desy.de                                                 Germany
> ------------------------------------------------------------------------
>
>

-- 
------------------------------------------------------------------------
Matthias Clausen                         Cryogenic Controls Group(MKS-2)
phone:  +49-40-8998-3256                Deutsches Elektronen Synchrotron
fax:    +49-40-8994-3256                                    Notkestr. 85
e-mail: [email protected]                           22607 Hamburg
WWW-MKS2.desy.de                                                 Germany
------------------------------------------------------------------------

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System