Re: [foxboro] Device Integrator 30 manual
- From: Ron Schafer <rschafer@xxxxxxxxxxxxxxxxxxxxxx>
- To: "'foxboro@xxxxxxxxxxxxx'" <foxboro@xxxxxxxxxxxxx>
- Date: Tue, 9 Mar 2010 08:59:15 -0500
I was just looking thru my DI-30 book and its B0193MS-A, and addendum and
errata set, and a DI30 installation instructions B0193TU.
We no longer use it but it did work well when we had used it. There is also a
Modbus Master Protocol for Device Integrator manual (no version codes) that was
printed at some point. As I remember its really difficult to understand and a
very detailed understanding of the Modbus protocol is necessary. Since there is
not any copyrighted notes on it I would assume they don’t care if its shared.
Anyone at FoxMass able to tell me if it would be ok to scan and put online or
shared with others?
Ronald G. Schafer
Distributed Controls System Administrator
White Birch Paper Company
Bear Island L.L.C. Division
10026 Old Ridge Road
Ashland VA, 23005
Phone 804-227-4034
Fax 804-227-4052
Email: rschafer@xxxxxxxxxxxxxxxxxxxxxx
-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On
Behalf Of Pablo Lioi
Sent: Monday, March 08, 2010 9:41 AM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] Device Integrator 30 manual
Brad,
Yes, you are right. I am just beginning to see the light.
I just realised that, although I am working with the same image at both ends, I
have to look at DI700AJ for the master and at DI700AK for the slave.
My error was that I thought that there was only one manual for the v344 image,
and that that manual was B0193RH-C.
Now everything makes sense.....
As always, thanks to everybody for been so patient and so kind in aswering my
questions.
Although I've been working with the I/A for ten years now, I sometimes feel
like a newbie.
Best Regards,
Pablo Lioi
TOTAL AUSTRAL S.A.
Tierra del Fuego
Argentina.
> From: brad.wilson@xxxxxxxxxxxx
> To: foxboro@xxxxxxxxxxxxx
> Date: Mon, 8 Mar 2010 08:55:02 -0500
> Subject: Re: [foxboro] Device Integrator 30 manual
>
> Pablo,
> I think the manuals you want are DI700AJ v1.16 (Modbus master) and DI700AK
> v1.13 (Modbus slave). Both are dated Dec 1999.
> The B0193RH-C manual is a generic hardware manual, but as others have said,
> does not address the specifics of the protocol.
>
> As you probably know, the Modbus FC3 message layout is:
> master query = <slave address><FC><start register 2 bytes><register count 2
> bytes><CRC 2 bytes>
> slave response = <slave address><FC><byte count><1st register value 2
> bytes><2nd register value 2 bytes>etc<CRC 2 bytes>
> The query message is built in the FDMSGx parameters of the FDSCAN (master).
> The FDIDMS block tells the input blocks (FDRIN, etc) where to find their
> values within the response message.
>
> Hope this helps.
> Brad Wilson
>
> -----Original Message-----
>
> We have DI30B's on both sides of the communication, using the Modbus RTU
> Protocol.
> The "onshore" DI30 acts as master and the "offshore" acts as "slave", but
> they are not using custom images, as far as I know.
> According to the ds_stasict command, we have v651v344.186 OS1FDB.GDT.
> The ECB20's of both ports are configured for RTU protocol.
> On the "master" side, pollings are implemented using FDSCAN and response
> messages are handled by FDIDMS and FDIIN blocks.
> On the "slave" side, querys are handled by FDIDMS, FDMSBL and FDIOUT blocks.
>
> The system was delivered with no documentation and the people who programmed
> it are no longer available.
> Originally, the system was working partially, with PERF error counters for
> the ports in Sysmon increasing all the time, due to configuration errors.
> Using the manual, I was able to correct the errors, but now I would like to
> have a deeper understanding of the system.
>
> Just to give you an example, I don't understand how a FDIDMS block on the
> "master" side identifies a response message for FC 03.The response for FC 03
> does not include the starting register number, so all responses from a given
> slave, with the same number of registers, look identical to the FDIDMS
> blocks. Yet, the FDIDMS blocks do include the starting register number, and
> in some way the data gets routed to the right place. Well, I didn't find any
> explanation for that in the manual.
>
> Regards,
> Pablo
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