Re: [foxboro] Floating point data via FBM 224

Hi,

I think we managed to read 32 bit floating points by reading special
triconex aliases.  It's mentioned in the Triconex Communication Guide (a
triconex document not I/A) and from memory it was just an offset from
the original register and split it into two consecutive 16 bit
registers.  So you may need to read B0400FK to glue them back together
again, along with the read me first, but only after you read
the...............

Sean

-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
On Behalf Of Gregory A Hurwitt
Sent: Wednesday, 23 July 2008 9:55 AM
To: foxboro@xxxxxxxxxxxxx
Subject: [foxboro] Floating point data via FBM 224


I am trying to read floating point data from a Triconex system (Tricon
V9.x) with an FBM 224.  Data is in Memory/Real/Read-only addresses in
the
Tricon (Modbus alias numbers 33xxx).  The "Example for Reading a
Floating-Point Input" in document B0400FK hasn't been much help.

The FBM 224 is a new replacement for an old Modicon Gateway 30.  Contact
and integer reads have been tested successfully in the new FBM 224.

In the old Modicon Gateway, the floating point data has been read using
SCAN blocks with DATYPE =3D 4 and BITLEN =3D 16, and AIN blocks with SCI =
=3D
12.


Greg Hurwitt
BASF Corporation
Freeport, TX 77541

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