Re: [foxboro] What are the chances of using Modbus Integ 30 to communicate with AB SLC5xx?

Neil,

The hardware for the Modbus Integrator and the A-B Integrator is the same.
You can purchase an ABDH license and talk to the AB PLC using Data Highway.

However, you could also use the Modbus Device Integrator. The Modbus Device
Integrator is the Modbus product sold by Ken Gunston's group. The difference
between it and the Modbus Integrator is that the Modbus Integrator was
designed for Modbus PLCs over a standard Modbus network (RS-485).

You want to deal with radios and the Modbus Device Integrator has been used
successfully with radios on a number of occasions. I was peripherally
involved in a project on Lake Maricaibo in Venezuela. On that project, the
standard Modbus Integrator was originally quoted and used with poor results
- like yours. Once the software was replaced with the appropriate product,
the problems went away.

So, I believe you have two options:

1) Buy a license for the AB-DH Integrator
2) Buy a license for the Modbus Device Integrator 

Talk to your Account Representative for pricing and product information.


Regards,

Alex Johnson
Invensys Systems, Inc.
10707 Haddington
Houston, TX 77043
713.722.2859 (office)
713.722.2700 (switchboard)
713.932.0222 (fax)
ajohnson@xxxxxxxxxxx
For the latest information on ArchestrA, go to
www.invensys.com/Archestra.html.

 -----Original Message-----
From:   Neil Martin [mailto:neil_martin@xxxxxxxxxxxx] 
Sent:   Monday, September 22, 2003 7:15 AM
To:     foxboro@xxxxxxxxxxxxx
Subject:        [foxboro] What are the chances of using Modbus Integ 30 to
communicate with AB SLC5xx?





Other than knowing there is probably a protocol difference, I do not know
much about the difference between Foxboro's Allen Bradley Integrator and
the Modbus Integrator.  Can someone answer a few questions for me.

First the Background:

We originally used Foxboro Modbus Integrator 30s to communicate with
several Fisher ROCs over radio communications.  This proved troublesome -
the thought being that when radio communications messed up enough, the
Modbus Integrator 30 did not know how to deal with it properly and would
end up locking up.  We are now thinking about installing an Allen Bradley
SLC5xx with Modbus communications and Prosoft card that is designed to talk
to Fisher ROCs over a radio link.  The Prosoft card will act as a master to
the ROCs to read or write values between the ROCs and the PLC.  We are then
hoping to be able to establish communications over a different port from a
Foxboro Modbus Integrator 30 to the SLC5xx via modbus to read or write the
same values between the PLC and Foxboro.  The link between Foxboro and the
PLC would be hard wired, we expect the PLC/Prosoft card combo to be more
forgiving with the radio communications and we expect that the PLC will
always have something in its registers for the Foxboro to read - even if it
is still only the previous older value.


The Questions:

We already have several Foxboro Modbus Integrators.  What chance do have in
being able to use the Modbus Integrator 30 to communicate with the Allen
Bradley SLC5xx in the manner described above?  Is there anything special
that we would need to know about?



Neil Martin
Huntsman Polymers Corporation
2505 South Grandview
Odessa, TX.  79766
ph) 432-640-8436
pager)432-742-4289
email page)9157424289@xxxxxxxxxxxxxxxxxx

 
 
_______________________________________________________________________
This mailing list is neither sponsored nor endorsed by Invensys Process
Systems (formerly The Foxboro Company). Use the info you obtain here at
your own risks. Read http://www.thecassandraproject.org/disclaimer.html
 
foxboro mailing list:             http://www.freelists.org/list/foxboro
to subscribe:         mailto:foxboro-request@xxxxxxxxxxxxx?subject=join
to unsubscribe:      mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave
 
 
 
_______________________________________________________________________
This mailing list is neither sponsored nor endorsed by Invensys Process
Systems (formerly The Foxboro Company). Use the info you obtain here at
your own risks. Read http://www.thecassandraproject.org/disclaimer.html
 
foxboro mailing list:             http://www.freelists.org/list/foxboro
to subscribe:         mailto:foxboro-request@xxxxxxxxxxxxx?subject=join
to unsubscribe:      mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave

Other related posts: