Another situation where the time will change even if you are all 8.X and MTK and BTK are setup and running correctly is if you have a XP box that is running stand alone and not connected to the mesh. If this box runs long enough without seeing a time server it will become a time server and send out time pulses. If you plug this box into the mesh while it's powered up there is a good chance that it will broadcast a time pulse which will change the time to its time then almost immediately the MTK will correct it. Even though it only changes it for a fraction of a second the damage it done. You're historians will now have a future time stamped value in it. Make sure you never plug a box into the mesh that is already powered up or if you do, make absolutely sure that its time matches your system time. Dwayne Landry PPG Industries Inc. -----Original Message----- From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On Behalf Of Boulay, Russ Sent: Wednesday, August 29, 2012 6:51 AM To: foxboro@xxxxxxxxxxxxx Subject: Re: [foxboro] XP reboot causes Time to Jump 7 hours ahead With the Mesh you define two MTK AW's (MTK and BMTK) in System Definition as defined on the system by the /usr/fox/sp/tk.cfg file When these two stations are alive...no "jump ball" takes place when MTK is relinquished. Only in the absence of both stations will another get the chance for takeover. On Mesh ...systems can run local timezone only when system time has been selected for UTC (vs. IATIME) When this is the case there is no issues with time being passed from Mesh to Node . However, if a system is configured for local timezone (Pacific Standard Time) and has inadvertently been configured for IATIME.....this can cause the described issue as the UTC compensation is missing. Whenever running IATIME on the Mesh...you must select the GMT timezone (Edinburgh, London..etc) Mesh supports running the local TZ when UTC is configured on the system...time will pass thru an ATS....to Nodebus systems running GMT with no issues. -----Original Message----- From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On Behalf Of Ken Heywood Sent: Wednesday, August 29, 2012 7:21 AM To: foxboro@xxxxxxxxxxxxx Subject: Re: [foxboro] XP reboot causes Time to Jump 7 hours ahead I discovered several years ago on a mixed XP 7.X/UNIX 6.X system that the time really depends upon the box that is the Master Timekeeper. As explained to me by TAC at the time, when you shutdown or reboot the current master timekeeper, another box takes over. It's non-deterministic. There is no way of knowing which box will become master. Now, Windows likes local time zone while UNIX runs GMT. So, if your current XP box is the Master and you shut it down, one of the UNIX boxes may try to take over. If it does, then you will get a jump in the system time (unless you are running all boxes on GMT). The fix, as told to me, is to run all boxes on GMT. There may be some magic in the mesh system now, but I'm not aware of any. Thank You, Ken Heywood Calibration Laboratory Manager PROCESS CONTROL SERVICES, INC. Established in 1983 http://www.processcontrolservices.com mailto:KHeywood@xxxxxxxxxxxxxxxxxxxxxxxxxx Telephone: 734-453-0620 Wireless: 508-241-2040 =============================================== -----Original Message----- From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On Behalf Of Brian Long Sent: Tuesday, August 28, 2012 4:13 PM To: foxboro@xxxxxxxxxxxxx Subject: Re: [foxboro] XP reboot causes Time to Jump 7 hours ahead Yes, we've had a similar issue before, in our case MESH side DCS time was ok, AIM time was not and Nodebus side time changed. We needed to update/quickfix AIM and the BTK was not set. (Either was never set or SysDef wacked it). We hold our breath every time we restart and make sure everyone knows the time may change. Our MTK and BTK are both MESH boxes. Hope the info helps. Brian Long Arkansas Kraft _______________________________________________________________________ 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 *** Confidentiality Notice: This e-mail, including any associated or attached files, is intended solely for the individual or entity to which it is addressed. This e-mail is confidential and may well also be legally privileged. 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