Re: [foxboro] FBM231 RS485 COMMUNICATION

If this does not provide a solution, try this:
1) use modscan or mdbus (from calta computing) to poll the slave device using 
your laptop
2) try to capture the frame sent and received from the slave device, in order 
to get the correct frame that works.
3) from this information, use modscan as a slave and put it on the port of the 
FBM to see if the IA is sending the same frame as modscan is

Usually, when you're trying to poll a slave device, the frame sent from the IA 
may be different from the one you send using modscan, because from IA the frame 
is made in base from the IO points you've configured, so a quick way to see if 
what you're doing is correct is to see if the "poll holding register" is sent 
to the slave device the way it should.

I've been doing this from quite long, and generally the problem gets solved 
with this procedure. Usually, the errors are from bad address (you might change 
the register address to +1 or -1, try that), the conversion (depending on the 
device, the float numbers might be from a single 32 bit register or made from 2 
consecutive 16 bit registers, and when is from 2 registers, you may have to 
swap bytes, or even have two swap bits, ie, from 32...1 to 1...32)

Make sure also that the modbus function is correct, ie, function 3 instead of 
function 4 or function 4 instead of function 3.

Regards,


Gonzalo Diaz


-----Mensaje original-----
De: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] En 
nombre de Dominguez, Angel
Enviado el: Domingo, 1 de Julio de 2012 17:37
Para: foxboro@xxxxxxxxxxxxx
Asunto: Re: [foxboro] FBM231 RS485 COMMUNICATION

Try it with a iin block for a single 16 bit register, if you can read try to do 
a swap f4:w3 for example.
Angel Dominguez
938 136-8842
-----Original Message-----
From: RAKESH DASH
Sent:  01/07/2012, 14:47
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] FBM231 RS485 COMMUNICATION

Angel/Sahara,
Yes, I have 43001:F4. Sorry I mistyped it. There are three different types of 
devices communicating. Port1 and Port2 device are fine and data also is 
received.
The device which is a electric meter & connected to Port3 is unable to 
communicate. Rather in SMDH it shows me healthy if I don't configure any points 
in IACC. As soon as I configure a floating point, & download, the SMDH says 
"Device Failed".
So not sure what I am missing. Gerrit has suggested few things to check which I 
will try.
Any other help on the subject is appreciated Thanks !!
- Rakesh

On Sun, Jul 1, 2012 at 9:49 PM, Dominguez, Angel < 
angel.dominguez@xxxxxxxxxxxx> wrote:

> There's two address format 5 or 6 digits, you should have 43001:F4 as
> a valid format.
> Angel Dominguez
> 938 136-8842
> -----Original Message-----
> From: שחר קצב
> Sent:  01/07/2012, 11:16
> To: foxboro@xxxxxxxxxxxxx
> Subject: Re: [foxboro] FBM231 RS485 COMMUNICATION
>
> Hi, does  the problem  is that you can't configure all the ports?
> Shahar chemada fine chemicals
>
> -----Original Message-----
> From: foxboro-bounce@xxxxxxxxxxxxx
> [mailto:foxboro-bounce@xxxxxxxxxxxxx]
> On Behalf Of RAKESH DASH
> Sent: Saturday, June 30, 2012 8:53 PM
> To: foxboro@xxxxxxxxxxxxx
> Subject: [foxboro] FBM231 RS485 COMMUNICATION
>
> Hi there,
> I am trying to interface FBM231 with an external device over RS485.
> The modbus data is Holding Register Floating Point (4 bytes) I checked
> the communication and data using modscan in a laptop and all is good.
> The configuration in FDSI baud rate etc. is also fine
>
> FBM231 is showing healthy on communication.
> But As soon as I define even one signal in the RIN block in the
> compound for receiving the data & download, the FBM231 goes out of
> order and shows me as device failed.
> I have configured the point address PNT_NO as 430001:F4.
>
> I there any known issue of such kind ? Does the FBM231 support
> floating point signals ?
> I am stuck with this and I have to wind this up by Tuesday. Any help
> on the subject is appreciated. Thanks !!
>
> Regards,
> - Rakesh
>
>
>
>
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files, is intended solely for the individual or entity to which it is 
addressed. This e-mail is confidential and may well also be legally privileged. 
If you have received it in error, you are on notice of its status. Please 
notify the sender immediately by reply e-mail and then delete this message from 
your system. Please do not copy it or use it for any purposes, or disclose its 
contents to any other person. This email comes from a division of the Invensys 
Group, owned by Invensys plc, which is a company registered in England and 
Wales with its registered office at 3rd Floor, 40 Grosvenor Place, London, SW1X 
7AW (Registered number 166023). For a list of European legal entities within 
the Invensys Group, please go to http://www.invensys.com/en/legal/default.aspx.

You may contact Invensys plc on +44 (0)20 3155 1200 or e-mail 
reception@xxxxxxxxxxxxx This e-mail and any attachments thereto may be subject 
to the terms of any agreements between Invensys (and/or its subsidiaries and 
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