LPK Posted June 16, 2015 Report Share Posted June 16, 2015 Hi there, Does anyone have any specifications on the accuracy of the real-time clock in the UniStream PLCs? I am using one (a USP-070-B10) for an application that monitors a very slow-changing system, and so needs to be accurate (hopefully at least to the nearest second) over a number of consecutive days. Sometimes tests stretch into weeks. I recently (about four weeks ago, but I’m not absolutely sure) noticed the clock was way off and synchronised it with my computer clock (which is accurate and auto-updates, etc.). This time I checked and it was between 4 and 5 minutes out, so seems like it might be deviating by about a minute a week. This is a real problem when we need to match up data on this system with data on other logging systems – it should not be more than a second or so out at any time if we are to do that accurately. Also, is there any way to get the system to update with daylight savings time, so the clock does not need to be manually reset at these points? Thank you for the advice. Quote Link to comment Share on other sites More sharing options...
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