Siemens SIMATIC S7-300 Manual page 108

Information for the Changeover to the Technology CPU
9.12 Information about interface X3 DP(DRIVE)
No diagnosis on DP(DRIVE)
Remember that you cannot evaluate diagnostic data from DP(DRIVE) in your STEP 7 user
program if you are using the Technology CPU.
However, with your PC/PG connected to PROFIBUS DP, you can use the "routing" function
to access drive parameters in the DP(DRIVE) line (in conjunction with appropriate drive
tools) for commissioning and diagnostic purposes.
9-8
S7-300 CPU Data: CPU 315T-2 DP
Manual, 12/2005, A5E00427933-02