Chapter 6 Symbol Variables project for a DVP-SV series PLC. Var_C in the project for AHCPU530-EN is a symbol of the VAR_RETAIN class. After Var_C in the project for AHCPU530-EN is imported into the project for the DVP-SV series PLC, Var_C becomes a symbol of the VAR class. Owing to the fact L0 is not supported by the DVP-SV series PLC, Var_D is eliminated. D65535 is not within the range of devices in the DVP-SV series PLC, and therefore Var_E is eliminated. Var_F is eliminated because the DVP-SV series PLC does not support the symbols whose data types are STRING. comments on the symbols in a symbol table.
Users not only have to pay attention to the data formats in symbol tables, but also have to pay attention to the A CSV file can be opened in Microsoft Excel and Notepad, as shown below. In a CSV file, the cells are divided by the commas. As a result, if there are commas in the Identifier Comment… cell for a symbol in a symbol table, the system will automatically regard the contents after the first comma as the contents of other cells, as shown by C2 and C3 which are in the red circle below. After the symbol table is imported again, the contents after the first comma will be lost. Before the symbol table is exported After the symbol table is imported 6-39