Specifications

3 General Programming

3.6 Symbolic addressing

Programming Guideline for S7-1200/1500

V1.2, Entry ID: 81318674



Recommendation

 “Don’t bother about the organization of the data storage“

 “Think” symbolically. Enter the “descriptive” name for each function, tag or

data, such as, for example, Pump_boiler_1, heater_room_4, etc. This is how a

generated program can easily be read without requiring many comments.

 Give all the tags used a direct symbolic name and define it afterwards with a

right-click.

Example

Table 3-7: Example for creating symbolic tags

Step Instruction

1. Open the program editor and open any block.

2. Enter a symbolic name directly at the input of an instruction.

3. Right-click next to the block and select “Define tag…” in the context menu.