Re: [foxboro] 1-5ma input on a FBM201

Hi Alex

        I am sorry but I don't recognize the IOMOPT options that you specif=
ied below (3D1, 3D0, etc.) maybe the list server is doing something weird d=
o to the font that you are using?

        Are there more options for IOMOPT than the standard 0,1,3 ?

Thanks

Peter

-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On=
 Behalf Of Johnson, Alex P (IPS)
Sent: Tuesday, April 29, 2008 3:58 PM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] 1-5ma input on a FBM201

Peter,

It seems to me that you could do it with two AINs. I think there are two ap=
proaches that would work, but I can't try them. As they said in my old math=
 texts, the proof is left to the student. :)


Option 1 - Scaled counts
Create two AINs. The first has IOMOPT=3D3D1 and is used to read your physic=
al input. Use the scaling factors on the block to change the raw counts so =
that whatever you get at 5ma is scaled to 64,000.

Connect that block's output to the MEAS of the second AIN (IOMOPT=3D3D0). I=
 think it will behave as you desire.


Option 2
Create two AINs. The first has IOMOPT=3D3D1 and is used to read your physic=
al input and scale 0-5ma as you want it in engineering units.

The second AIN would have IOMOPT=3D3D2 and take in that measurement. If you=
 set the scales properly, I think the OSV/BAD will kick in.


Of course, free advice is worth what you pay for it. :)

Regards,
 =3D

Alex Johnson
Invensys Process Systems
10900 Equity Drive
Houston, TX 77041
713 329 8472 (voice)
713 329 1600 (switchboard)
713 329 1700 (fax)
alex.johnson@xxxxxxxxxxxxxxxx
 =3D


-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
On Behalf Of Bruley, Peter T
Sent: Tuesday, April 29, 2008 3:44 PM
To: Foxboro@Freelists. Org (foxboro@xxxxxxxxxxxxx)
Subject: [foxboro] 1-5ma input on a FBM201

Gentlemen:
        I am trying to use a FBM201 to measure 1-5ma input.

        I am using an AIN & can scale the output to read 0-100% for 1-5ma i=
n however I don't get the OOS/BAD i/o bits set when I go over/under the OSV

        The AIN block doesn't have a SCI for:  Linear 3200 to 1600 ( 1 to 5=
 mA)

        Is there any way to set the raw counts scale in the AIN block manua=
lly?


Thank You,

Peter Bruley

Plant Process Computer Analyst
Xcel Energy - Sherco Generating Plant
13999 Industrial Boulevard
Becker, MN, 55308
(763) 261-3821
Peter.T.Bruley@xxxxxxxxxxxxxx



 =3D

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