3/7/2011 7:44 PM | |
Posts: 52 Rating: (4) |
Hi everyone, I need to synchronize my PLC (actually 5 PLCs but that's out of subject) date and time with real date and time. I used the method given at the entry7802886and I consider it is a elegant way to solve my problem. However, the statement at the begining of the entry makes me feel uneasy: "Note also thattime jumps (forwards/backwards)can occur, which means that the solution is not suitable for applications that must be chronologically correct." I don't understand why there can be time jumps. I need real time for alarm logging and some kind of calculation (integral of a data) for total production. As you guess, time precision is not the main aim, there can be up to several seconds difference between PLC and real time. On the other hand time jumps probably cause a lot of trouble. So, can anyone tell why there can be time jumps within this method or suggest a better solution?
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Last edited by: beserb at: 3/7/2011 7:59 PMA little more info: I call the "set cpu time" function every minute cyclically. Last edited by: beserb at: 3/7/2011 7:46 PM |
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3/9/2011 9:18 AM | |
Posts: 947 Rating: (45) |
Hello beserb! |
Last edited by: gre_m at: 3/9/2011 9:20 AM |
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