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3/13/2008 11:44 PM | |
Posts: 2661 Rating: (279) |
This is normal behavior. The initial values are used the first time the data block is “read” and these values are “written” to the actual values. The initial values have a special use: some program blocks might use “preset” values from a DB and perform some calculations (for example). In such cases it important to have correct initial values. But in cases where the value is dynamically overwritten, the initial value is meaningless and should be ignored. The actual values are the values that are in the PLC. See attachment. AttachmentDokument1.pdf (166 Downloads) |
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