Category: Historic

Question: How can I enable data discard from a Historic’s table every 24 hours? Solution: To do so, you must enable the Discard data from main table option in the…

Question: Can I create historic fields at runtime? Or are they only available for edition in the Studio? Solution: Yes, you can create historic fields at runtime; to do so,…

Question: Can I disable the UseTagQuality option from the Historic’s properties to save space in the database? Solution: No, you can’t, because when this option is disabled, the value 1…

Question: How can I record the TimeStamp in a PLC that is read by six different tags (day, month, year, hour, minute, and second) in the Historic‘s E3TimeStamp field? Solution:   …

Question: How can I record in a Historic when the minute is a multiple of 15? Solution: To do so, you must use the Minute function and a Demo tag…

Question: Is it possible to link a Historic to a pre-existing table in the Database? Solution: Yes, it is possible. After setting the Historic object’s Database, just access the Link…

Question: The application reads the PLC’s decimal value as “0.98”, but the Historic displays this value as 0 instead. Why does this happen, and how can I fix this? Solution:…

Question: If I try to generate the Historic’s structure in an Access Database, the following error occurs: Why does this happen? Solution: This happens because there is a limit of…

Question: Can I change the Historic‘s scan value at run time? Solution: Yes. To do so, create a link at the Historic‘s ScanTime property: This property can also be edited…