Re: [foxboro] Integrator 30 for Modbus quirk
- From: "Loudermilk, Virgil:" <Virgil.Loudermilk@xxxxxxxxxxxxxxxxxx>
- To: <foxboro@xxxxxxxxxxxxx>
- Date: Thu, 5 Feb 2009 09:20:28 -0500
Thanks, everyone, it seems we had two main problems that are now
resolved:
1. Apparently heartbeat is very critical in multi-drop systems as
explained in the manual (imagine that!), and Modsim doesn't support it.
2. The Modicon PLC had a strange problem where it would answer ALL
polls to ALL addresses with invalid responses. This went away after a
reload.
-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
On Behalf Of David Johnson
Sent: Thursday, February 05, 2009 7:03 AM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] Integrator 30 for Modbus quirk
I'm sure you did this, but just to be clear.
You are sure the device is a modbus slave?
You are sure the modbus address of the device matches what you expect?
(Of course, you said it doesn't seem to be polling from I/A when you
look at the traffic, so the above guesses are probably not the problem.)
After you added the ECB16, you put it online in the system monitor?
(I know you did, but I have to ask.)
Also what is the BPC of the gateway? Many people run these at 1
second instead of .5, this makes the PERIOD information shown on
detail displays incorrect. William Ricker is correct in that Period
/ Phases in the Compound itself, and the MDSCAN block must be
compatible. In rare instances we have also seen cases where
re-phasing blocks in Integrator 30s does not seem to work. In those
cases (2 in 10 years) we had to shutdown the gateways during an
outage, initialize and re-load before everything worked as it should.
Best of luck,
David
_______________________________________________________________________
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: //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: //www.freelists.org/list/foxboro
to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join
to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave
Other related posts:
