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8 results from messages in bacnet-mstpwg

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  • MSTP-WG, The MSTP-WG will have a teleconference Friday, 15-Nov-2013 at 11:30 AM EST. The teleconference will be one hour and the agenda is as follows: 1) Review outstanding PPR comment responses, if any, and vote to move the comment response document to the SSPC. 2) Identify any technical issues that were uncovered during the PPR and discuss how to move forward on those issues. 3...
    Coleman Brumley Nov 13, 2013
  • Carl, I see your point. In my experience, it's not a matter of meeting the timing. When I've seen this occur, it's usually because of some comm. error (framing, parity, collision, pick your favorite) which causes the receiving node to "miss" the token and for whatever reason sends the receiving device into a the incorrect state, then the sending guy retries and now the retry is...
    Coleman Brumley Jul 18, 2012
  • What John is proposing was discussed during a meeting recently (I forget where it was, but I believe it was within context of the new baud rates or making max-master configurable). The idea was, why drop the token and start a (potentially lengthy) PFM cycle when the NS "was just there a few milliseconds ago". I agree with John that a second (or even third) token retry isn't that...
    Coleman Brumley Jul 18, 2012
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  • Giri, The auto-baud algorithm used in a device is left entirely up to the vendor. Regards, Coleman From: bacnet-mstpwg@^$1 [mailto:bacnet-mstpwg@^$2] On Behalf Of girig123 Sent: Wednesday, December 14, 2011 10:29 PM To: bacnet-mstpwg@^$3 Subject: [bacnet-mstpwg] MSTP auto baud hi from the BTL test casses i found that test casses accomodate devices that can do auto baud rate, but...
    Coleman Brumley Dec 15, 2011
  • Cliff, I've been mulling this over since we talked about it in Vegas. How would you be able to make a logical connection/relationship from the NPO on the wire to the physical port? I don't think you can other than with labels, documentation, or whatever. Consider I/O objects, where this already an issue. If I have X binary outputs on a device, and I have X BO objects -- how do I...
    Coleman Brumley Feb 11, 2011
  • Old devices would simply drop the broadcasted large frames. From: bacnet-mstpwg@^$1 [mailto:bacnet-mstpwg@^$2] On Behalf Of kerlyn2001 Sent: Wednesday, February 09, 2011 8:51 PM To: bacnet-mstpwg@^$3 Subject: [bacnet-mstpwg] Re: Large Frames for MS/TP What about broadcasts on segments that contain both old and new devices? Do you agree that old devices should reject large broadcast...
    Coleman Brumley Feb 9, 2011
  • The MSTP-WG will have a meeting in Germantown on Tuesday, May 11, 2010 at 11:00 AM to 12:00 PM, EDT. Location: Montgomery College Germantown Campus Goldenrod Building (GB), Room GB105 Goldenrod Lane Germantown, Maryland 20876 Note: Goldenrod Building is across the street from the Hampton Inn on Goldenrod Drive. Directions: http://www.montgomerycollege.edu/maps/gvic.html Parking...
    Coleman Brumley May 7, 2010
  • MS/TP-eers, I've uploaded the document CLB-018-1.doc to the Yahoo! MS/TP group. This document addresses the inconsistency between the max-master and max-info-frames properties of the device object. In my experience, it's more beneficial to MS/TP network performance that max-master be configurable somehow -- whether this be "via BACnet services" or some other mechanism. The BTL...
    cbrumley Mar 27, 2009