Re: [foxboro] RV: Open loop alarm

And by AOUT I actually mean that there are new FBMs that support readback of
their outputs.
*         FBM 205b Redundant 0 to 20 mA 4 In 4 Out with Output Readback

*         FBM 241e Redundant Relay Output with Output Readback

 

 

Regards,

 

Alex Johnson

Invensys Systems, Inc.

10707 Haddington

Houston, TX 77063

+1 713 722 2859 (voice)

+1 713 932 0222 (fax)

+1 713 722 2700 (switchboard)

alex.johnson@xxxxxxxxxxxxxxxx

 

 

-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On
Behalf Of Joseph M. Riccardi
Sent: Saturday, November 26, 2005 12:45 PM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] RV: Open loop alarm

 

 

I think Corey needs to clarify how he defines "open loop".  I believe there

may be some confusion ...

 

Joseph M. Riccardi

DCS Services - Industrial Process Controls

 

www.eRiccardi.com

 

Joe@xxxxxxxxxxxxx

"To give real service you must add something that cannot be bought or

measured with money; and that is sincerity and integrity." - Donald A. Adams

 

-----Original Message-----

From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On

Behalf Of Johnson, Alex P (IPS)

Sent: Saturday, November 26, 2005 1:10 PM

To: foxboro@xxxxxxxxxxxxx

Subject: Re: [foxboro] RV: Open loop alarm

 

AOUTs don't have readback in older modules. There are new AOUTs that do.

 

I thought the question was about AINs.

 

Regards,

 

Alex Johnson

Invensys Systems, Inc.

10707 Haddington

Houston, TX 77063

+1 713 722 2859 (voice)

+1 713 932 0222 (fax)

+1 713 722 2700 (switchboard)

alex.johnson@xxxxxxxxxxxxxxxx

 

-----Original Message-----

From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On

Behalf Of Corey R Clingo

Sent: Saturday, November 26, 2005 12:07 PM

To: foxboro@xxxxxxxxxxxxx

Subject: Re: [foxboro] RV: Open loop alarm

 

Well, I must have a day zero system (no pun intended :).  Or maybe you can

help me out here.  I built an AOUT block to point #8 on a FBM04 with no

wires on it.  I set BAD=1, IOMOPT=1, SCO=3.  I put the block in AUTO and

manipulated the MEAS.  It was faithfully conditioned and passed through to

OUT; no alarms were generated, and INITO was 0.  Is there anything else one

has to do to get it to alarm and/or initialize on open loop?

 

I'll try it on a FBM237 next week when we get one hooked up.

 

 

Corey Clingo

BASF Corp.

 

 

 

 

 

"Johnson, Alex P (IPS)" <alex.johnson@xxxxxxxxxxxxxxxx> Sent by:

foxboro-bounce@xxxxxxxxxxxxx

11/26/2005 11:14 AM

Please respond to

foxboro@xxxxxxxxxxxxx

 

 

To

foxboro@xxxxxxxxxxxxx

cc

 

Subject

Re: [foxboro] RV: Open loop alarm

 

 

 

 

 

 

If you set the SCI to the proper value (4-20ma) and set the BAD option, 

you

get the described behavior for 4-20ma signals. This has been true since 

day

one.

 

Regards,

 

Alex Johnson

Invensys Systems, Inc.

10707 Haddington

Houston, TX 77063

+1 713 722 2859 (voice)

+1 713 932 0222 (fax)

+1 713 722 2700 (switchboard)

alex.johnson@xxxxxxxxxxxxxxxx

 

 

-----Original Message-----

From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] 

On

Behalf Of Corey R Clingo

Sent: Saturday, November 26, 2005 10:24 AM

To: foxboro@xxxxxxxxxxxxx

Subject: Re: [foxboro] RV: Open loop alarm

 

On which version of I/A does this happen?  Open loops on analog outputs

are not detected on any version I've used up to 7.1/CP60, even with the

BAD option set, on legacy or 200-series FBMs.  I remember being quite

surprised at this, as it is a standard feature on the Honeywell AO blocks

I used before coming to I/A.  It would be nice to have.

 

Corey Clingo

BASF corp.

 

 

 

 

 

 

 

 

 

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This mailing list is neither sponsored nor endorsed by Invensys Process

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_______________________________________________________________________

This mailing list is neither sponsored nor endorsed by Invensys Process

Systems (formerly The Foxboro Company). Use the info you obtain here at

your own risks. Read http://www.thecassandraproject.org/disclaimer.html

 

foxboro mailing list:             http://www.freelists.org/list/foxboro

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