Siemens SIMATIC S7 Manual page 24

MODBUS / TCP communication via the integrated PN interface of the CPU
2XV9450-1MB02; Manual edition 2.1
3. The output IDENT_CODE shows an 18 character string.
Copy this string per copy/paste from the DB und and insert it in the
form IT4Industry SOFTWARE REGISTRATION FORM. This form is
stored in the library path
..\Program Files\Siemens\Step7\S7LIBS\Modbus_PN_CPU
during installation and is also available on the installation CD.
Insert the License-No. of the product package into the form.
4. Please send the form per e-mail to IT4Industry
it4.industry@siemens.com.
Hereupon you will receive the registration key for your PLC.
Licensing
5-2