Re: [foxboro] Integrator 30 Modbus Connection to Multilins

Usually, the issue is the Modbus device doesn't support the heartbeat. I
think that is Modbus message 8 (or was it 6?) Doesn't matter.

I have a Modbus checklist that might help which I will send separately.

If the Modbus Integrator won't cut it, you may the semi-custom FDI Modbus
interface. Harder to configure, but handles all permutations of Modbus.
(This is covered in the document.)

Regards,

Alex Johnson
Invensys Systems, Inc.
10707 Haddington
Houston, TX 77043
713.722.2859 (office)
713.722.2700 (switchboard)
713.932.0222 (fax)
ajohnson@xxxxxxxxxxx
For the latest information on ArchestrA, go to
www.invensys.com/Archestra.html.

 -----Original Message-----
From:   Landriault, Yvon [mailto:YLandriault@xxxxxxxx] 
Sent:   Friday, May 23, 2003 10:28 PM
To:     'foxboro@xxxxxxxxxxxxx'
Subject:        [foxboro] Integrator 30 Modbus Connection to Multilins


To all:

We have a Foxboro Integrator 30 for Modbus Controllers and I would like to
connect that up to a Modbus compliant device which speaks rs485 Modbus RTU.


The configuration is basically the Int30, an RS232/485 converter and the
Modbus device (Multilin).  The device settings are 2400,8,N,1 (half duplex).

We have tried in vain to make this work.  The ECB block to go on-line.  We
can use a PC and talk to the Modbus device however.  When we try to put the
ECB16 block online it times out.  The RS232/485 converter flashes (ie: the
232 sends out a signal).

We also tried to use an ECB20 block however we got an "Invalid Block"
message when we tried to save it.

Has anyone out there set up a similar configuration.  If so, could you
please forward some details including cabling configuration, dip switch
setting (P0970VB) and the ECB block configuration.  

Thanks in advance.

Yvon..

Yvon Landriault
Senior CA&E Engineer

 
 
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