Experimental Physics and
Industrial Control System

"David Dudley" <[email protected]> · Fri, 26 Sep 2008 16:36:00 -0500

Bob,

There's a possibility that the Siemens 575 taskcode driver I have might
interface to this, if the S7 has the capability of doing 575 taskcode
communications (I'll call my Siemens rep and check on that).

How are you going to interface to the PLC?  The driver I have currently
can connect serially, or through a CTI2572 Ethernet interface, and I'll
check with Siemens to see if there is a comparable way you can connect
to the S7.

The driver can read/write registers and control registers (which was
all I needed when I implemented it).

David

>>> Emmanuel Mayssat <[email protected]> 9/26/2008 4:22
PM >>>
Dalesio,

If you don't need the write access to the Siemens PLC from the control
system, you can do a simple FTP transfer from the PLC to an IOC of the
PLC registers. After that you can just parse the file locally.
That will save you $5K+ (price of the modbus hardware and software).
--
Emmanuel Mayssat

On Fri, 2008-09-26 at 10:40 +0200, Matthias Clausen wrote:
> Dalesio, Leo wrote:
> > Has anyone integrated the diagnostics from SIemen's PLCs into
EPICS?
> > Thanks,
> > Bob
> >   
> All of the solutions we are aware of are talking to the Ethernet 
> interface of the communication processor (CP) of the PLCs.
(exchanging 
> process data)
> Diagnostics are available on the Ethernet port of the main CPU. This
may 
> provide a Web server or other diagnostics.
> What kind of diagnostics are you interested in?
> A heart beat could also be implemented in the PLC's exec code and be

> transferred through the CP.
> There's support for a broken Ethernet link in the driver (records get

> invalid)...
> 
> I do not know of any support to communicate with this port.
> -Matthias

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System