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Found 5 results

  1. Hello, I am using SAMBA PLC (4.3 and 7.0 as well) for historic car rallies, in order to calculate ideal distance based on time and a given average speed. I have noticed that the RTC has a strange behaviour. I syncronize my PLC RTC with an accurate digital clock, and after a few minutes, I can notice already, a small difference (e.g. 3/10 of a second). But after a while, the two clocks are syncronized again. I tried also the following. I used the SB 15, which comes true 10 times per sec, and I increase a ML15 every time SB 15 is true. In parallel, I created a bit (MB6) which comes true, every time the RTC seconds change. Based on it, I increase ML10 by 10 this time. I compare those 2 values every second. If everything was ok, the difference of these values should always be 0, or at least something fix, but in fact I see that this difference is changing, from 0 to 5 (means max difference 0,5 sec) Why this occurs, and is there anyway to avoid it? In fact I need an accurate RTC, which will always be synchronized with the rally organization clock. Thank you in advance
  2. Hi, I am facing troubles while trying to log and later display time using Jazz2 controller. So, I'm trying to make an error log. When the error occurs I store current content of SI31 (RTC time) to MI (MI33 in this case - so far it's working). Then in order to display the error I pass MI33 content to MI41 (MI41 is linked to Time Function variable (in CT format) that is then displayed on HMI) . You can see the whole process in images below. The problem is that in the end, the content of MI41 (decimal 1500 - which I corresponds to 15:00 time) is then displayed as 05:DC on the HMI display. I guess the problem is caused due to DEC/HEX conversion. Any idea how to fix this ? Thank You.
  3. What are the "UTC to Date Time" and "Date Time to UTC" function blocks for? Could not locate reference in the textual help. I know RTC= Real time Clock and guess UTC is universal coordinated time? What sparked this question is that I was wanting to have a data tag that would show the date in MM/DD/YYYY for display in an HMI element to use as a "counter reset last on date mm/dd/yyyy" . The RTC date stuct parses out the elements of the date as a whole, so I'm guessing I would have to piece it together with logical functions? Just wondered if there was an easier way (I'm always looking for those). Thanks -hw
  4. Hello, First I would like to apologize for my bad english. I'm working on program which is completely controlling system of solar panels, as a diploma work. I've got few problems but this one makes me sad. I can't figure out, how to correctly setup real time clock. I've tried examples in visilogic directory, searched the whole help at the program but after 2 days, still can't make it work. The best way possible for me would be having DW with real time information about time, such as DD.MM.YY and HH.MM.SS ... If it's even possible, because, I'm having many operations which will need to write time when it happened and only one DW with time would save me much space in ladder. But, I will be satisfied with any other working option. I've found SI30-36 but they are read only, so I can't use them to write there down todays time. Since I'm still beginner with ladder programming, can someone please give me an advice? I'm really desperate. I will give more information, if needed. Just leave me here a message. Thanks in advance for help. Best regards Martin P. EDIT: I may find a way but I can't figure out how to increase DW by 1. It increasing something but more then it should, like 50 per sec. Is there way to do it? Thanks again!
  5. Hi I have been looking into the new UniStream equipment and I am very impressed! Can someone shed some light on the Date / Time / UTC structs? It currently seems very long winded to use a date or time function within the ladder, but the help folder says that an included date / time struct is available. Can someone point me to where this is? I'm looking to write the date to a data table, with Visilogic this was a simple RTC to ASCII task.