Re: [foxboro] Float Star Communication with DCS
- From: Eddie Hague - FieldServer <ehague@xxxxxxxxxxxxxxx>
- To: foxboro@xxxxxxxxxxxxx
- Date: Mon, 21 Jan 2002 17:36:01 -0800
I can answer the SA85 hardware issue: Absolutely it can be configured as a
slave device - we use it as such all the time for our gateway devices
(FieldServers). Obviously the driver software you are using with the SA85
needs to be written to incorporate slave mode operation.
We could help you with a Modbus-Plus to Modbus/TCP link and get the SA85
card out of your server - contact me if you are interested.
Edward Hague
CTO
FieldServer Technologies
408 262 2299
ehague@xxxxxxxxxxxxxxx
www.fieldserver.com
-----Original Message-----
From: sumankumar hampapur [mailto:suman_h_kumar@xxxxxxxxx]
Sent: Monday, January 21, 2002 4:01 PM
To: foxboro@xxxxxxxxxxxxx
Subject: [foxboro] Float Star Communication with DCS
We have problem in establishing DCS communication with Float star.
Setup is as follws:
The process control software (Kepware) resides on a standalone windows 2000
computer (this is a server machine). The SA 85 card is configured on this PC
as well. The communication to be established is with DCS via Modbus Plus.
Dcs is Master and the (Kepware)Floatstar is Slave. All requests are
initiated from DCS. The holding registers in the Floatstar is 400001-40000*.
The device ID of Floatstar is DS.1.0.0.0.0. which means Device ID is 1.
When we switch ON the compounds, the ECB Fails with time out errors,
indicating no response from the SA85 card.
We spoke to local Schneider assistance and they categorically stated that
SA85 status as Master and cannot be changed - ever.
Also we found that we can chage in Kepware software from Master to slave.But
we are not definitely sure that the card assumes slave role, ie., on both
sides of the connection - not just in it's relationship to Kepware
connection - but also in the SA85 to the rest of the Modbus Plus
relationship?
Could somebody tell us this communication has been physically done in a
known plant?
If so, please help us
thanks
suman
--
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