Re: [foxboro] Accum Block Reset

Terry is right.
As long as you have the two CP's look at the "HOUR" parameter independently, 
you will be stuck with a max 2 second difference.
Have only one CP (can be a third CP)look at the "HOUR" and set some bit 
accordingly and let both ACCUMs look at that bit instead and you're in business.
Regards,
René Bakker - EMEATAC - Invensys Systems - Baarn - the Netherlands 


 Subject: Re: [foxboro] Accum Block Reset
 Date: Mon, 16 Feb 2009 12:09:36 -0500
 From: tdoucet@xxxxxxxxxxxxxxxxxx
 To: foxboro@xxxxxxxxxxxxx
 
 Brian,
 The Master Timekeeper is supposed to keep the internal clocks of all stations 
(including CP's) within +-1 second, previous to V8. So your two CP's (worst 
case) could be almost 2 seconds difference. This is the best resolution you 
should expect to see.
 
 
 If that is acceptable, then you can try the period phase items, below.  But 
remember that you need a 1/2 second or at worst 1 second period.
 
 Check to see if you have OM_Scanner overruns on both CP's
 
 Terry Doucet, Eng.

* Confidentiality Notice:
This e-mail and any associated files are intended solely for the individual or 
entity to whom they are addressed. Please do not copy it or use it for any 
purposes, or disclose its contents to any other person. Further, this e-mail 
and any associated files may be confidential and further may be legally 
privileged. This email is from the Invensys Process Systems business unit of 
Invensys plc which is a company registered in England and Wales with its 
registered office at Portland House, Bressenden Place, London, SW1E 5BF 
(Registered number 166023).  For a list of European legal entities within the 
Invensys Process Systems business group, please click here 
http://www.invensys.com/legal/default.asp?top_nav_id=77&nav_id=80&prev_id=77.

If you have received this e-mail in error, you are on notice of its status. 
Please notify us immediately by reply e-mail and then delete this message from 
your system. Thank you for your co-operation. You may contact our Helpdesk on 
+44 (0)20 7821 3859 / 2105 or email inet.hqhelpdesk@xxxxxxxxxxxxx This e-mail 
and any attachments thereto may be subject to the terms of any agreements 
between Invensys (and/or its subsidiaries and affiliates) and the recipient 
(and/or its subsidiaries and affiliates).


 
 
_______________________________________________________________________
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
to subscribe:         mailto:foxboro-request@xxxxxxxxxxxxx?subject=join
to unsubscribe:      mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave

Other related posts: