Re: [foxboro] FBM231 RS485 COMMUNICATION
- From: RAKESH DASH <rakeshinxs@xxxxxxxxx>
- To: foxboro@xxxxxxxxxxxxx
- Date: Tue, 3 Jul 2012 23:47:16 +0530
To all those who have replied to this query and helped me out. A big thank
you. The problem is solved. DIP switches were the culprit. Also, i grounded
the shield which was not grounded at the slave end.
Thanks Guys.
Foxboro Team Rocks
- Rakesh
On Tue, Jul 3, 2012 at 12:54 PM, ש×?ר קצ×? <shahark@xxxxxxxxxxx> wrote:
> How can you make the modscan software as a slave ?
> Shahar -chemada fine chmicals
> -----Original Message-----
> From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
> On Behalf Of Gonzalo D?az
> Sent: Monday, July 02, 2012 3:15 PM
> To: foxboro@xxxxxxxxxxxxx
> Subject: 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: ש×?ר קצ×?
> > 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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> 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.
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> Systems (formerly The Foxboro Company). Use the info you obtain here at
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