Re: [foxboro] Controller Issue after upgrade
- From: Dale Gillis <dale_gillis@xxxxxxxxxxx>
- To: "foxboro@xxxxxxxxxxxxx" <foxboro@xxxxxxxxxxxxx>
- Date: Wed, 6 Jun 2012 18:36:16 -0300
Just a guess on my part but I remember LIMOPT behaving something similar to
this between software upgrades. May be worth checking.
Sent from my iPhone
On 2012-06-06, at 5:20 PM, "Johnson, David" <David.Johnson@xxxxxxxxxxxxxxxxxx>
wrote:
> Hello all,
> We are looking into some strange behavior after a recent upgrade from a CP30
> to an FCP270. A PIDA block was set to be Proportional Derivative, MODOPT=3,
> PBAND = 125, INT=0.075 (INT is BTIME in PD mode). The BCALCI and FBK were
> both connected to the PIDA's own .OUT parameter. The Period is a 3, Phase is
> a 2. I think the BPC of the CP30 and FCP270 are both .5 seconds.
>
> Behavior
> In the FCP270, the output drives to the low output limit. It's as though the
> loop is in open loop control. Looking at trends indicate that this loop was
> controlling in the CP30. The configuration is identical to what it was in
> the CP30.
>
> Any advice on what to check.
>
> Thanks,
> David
>
>
> ________________________________
> Confidentiality Notice:
>
> The information contained in this message is private and confidential. This
> information is intended only for the individual or entity named above. If the
> reader of this message is not the intended recipient, you are hereby notified
> that any use, review, dissemination, distribution, copying or action taken
> based on this message or its attachments, if any, is strictly prohibited. If
> you are not the intended recipient, please contact the sender by reply email
> and delete or destroy all copies of this message and any attachments. Thank
> you.
>
>
>
> _______________________________________________________________________
> 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: //www.freelists.org/list/foxboro
> to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join
> to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave
>
_______________________________________________________________________
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: //www.freelists.org/list/foxboro
to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join
to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave
Other related posts:
