Why can Siemens S7-200PLC programming software modify the symbol table without modifying the program - Database & Sql Blog Articles

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I am doing the program, because the position of many DI/DO points has changed now. It is very easy to make mistakes when I change the symbol table and change the program. Is there any function similar to the S7-200 programming software, which can be based on the symbol, only modify the symbol table.
A: According to your description, you want to use the symbolic addressing mode to modify the actual address of the IO area. This method is achievable.

Figure 1 Modify addressing priority

Figure 2 Confirmation display

Figure 3 Symbol table modification