11
The required module is pulled into the address list with drag and drop. The length of words is
determined with the modules. The input and output address ranges are determined in the E-address
and A-address. The unit address can be retrospectively allocated again by double-clicking on the
slave unit.
All of the hardware configuration must be transferred to the S7 so that communication can take place.
Simatic variables table
Assign a communication to a variable table for testing purposes. In the project overview, go to the
menu point Insert -- > S7 module -- > Create variables table. After calling up the variables table, the
operands must be allocated. Allocation takes place according to the address range which is
automatically or manually assigned in the hardware configuration.
Illustration 10
Illustration 11
