Experimental Physics and
Industrial Control System

Emmanuel Mayssat <[email protected]> · Fri, 26 Sep 2008 14:22:35 -0700

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