Data Tables: Synchronizing Data
When you download Data Tables to a controller, VisiLogic checks to see if the controller already contains Data Tables. If the structure of the tables is not identical, VisiLogic opens the Synchronize Data Tables box.
To synchronize data values, VisiLogic uploads the data from the PLC Data Tables into Data Tables within the PC, and then downloads the tables and data values when download is completed. This enables you to preserve values within the controller's Data Tables, even if the data type in that column has been changed. For example, if a Data Table column in the PLC that contains an integer is transferred to a long integer, the two bytes of the integer value will be placed in the 2 least significant bytes of the long integer.
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Synchronize all columns
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VisiLogic automatically uploads all of the data values in the PLC Data Tables into the PC tables. Data is matched up according to column name. When download is completed, the new Data Table is installed in the PLC with all of its data values intact.
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Synchronize selected columns
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Selecting this option opens up a window that enables you to manually link the PC Data Table columns with those in your PC. The data values within the columns are then transferred to the new defined location.
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Do not synchronize
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Downloads the Data Tables as structured in your project, regardless of any PLC data.
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