Re: [foxboro] PIDE controller query
- From: "McQuaid, Paul" <paul.mcquaid@xxxxxxxxxxxx>
- To: "foxboro@xxxxxxxxxxxxx" <foxboro@xxxxxxxxxxxxx>
- Date: Wed, 6 Feb 2013 04:38:51 -0600
Please bear with me I have never actually used a PIDE block in anger and I base
what I say on previous experience with Stand alone PID controllers and a quick
look at the PIDE block parameters in Reference document B0193AX volume 3......
What are your P, I and D, and BIAS settings? I suspect that to achieve what you
are looking for you should find it is Proportional only, I and D should be 0
(as there is no MODOPT to select Pb only). BIAS should then be adjusted to
achieve 0% when Meas = SPT. This should equate to -50% as BIAS is scaled in
output units, I assume 0 to 100%....????
Best Regards
Paul McQuaid
Mob:+44(0)7776 245320
-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On
Behalf Of Andriny Bt Rusman (T&E/PETH)
Sent: 06 February 2013 07:28
To: foxboro@xxxxxxxxxxxxx
Subject: [foxboro] PIDE controller query
Dear all knowing list,
I have a problem with my PIDE. It is an override controller that is supposed to
operate ONLY when the MEAS=< (same or below) SPT. The meas variable is always
way above SPT. The output should always be 0 unless MEAS=<SPT.
My problem is, everytime my Meas approaches SPT, my output starts to increase,
which I don't want as the output shd start increasing only when meas value
drops to SPT or below!
How do I avoid this with PIDE? Is it a tuning issue as the PB is very tight as
I want it to act fast. Do I need to change to PIDA? What are the parameters I
need to change to achieve this?
Many thanks,
Andriny
DISCLAIMER : This e-mail and any files transmitted with it ("Message") is
intended only for the use of the recipient(s) named above and may contain
confidential information. You are hereby notified that the taking of any action
in reliance upon, or any review, retransmission, dissemination, distribution,
printing or copying of this Message or any part thereof by anyone other than
the intended recipient(s) is strictly prohibited. If you have received this
Message in error, you should delete this Message immediately and advise the
sender by return e-mail. Opinions, conclusions and other information in this
Message that do not relate to the official business of PETRONAS or its Group of
Companies shall be understood as neither given nor endorsed by PETRONAS or any
of the companies within the Group.
_______________________________________________________________________
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:
