The CPU 1517F-3 PN/DP has:

• A powerful processor:
  The CPU achieves a standard command execution time as low as 2 ns per binary instruction.
• A large work memory:
  3 MB for program, 8 MB for data
• SIMATIC Memory Cards as load memory;
  permit additional functions such as datalog and archives
• Flexible expansion capability:
  single-tier configuration with max. 32 modules (CPU + 31 modules)
• Screen with functions for
  • displaying overview information such as IP address of the integrated interface, station name, plant designation, location identifier, etc.
  • displaying safety mode, overall signature and date of the last download with signature change
  • displaying diagnostic information
  • displaying module information
  • showing display settings
  • displaying a user-definable logo
  • setting IP addresses
  • setting date and time
  • selecting the operating mode
  • resetting the CPU to factory settings
  • disabling/enabling of display
  • Enabling of protection levels.
• PROFINET IO IRT interface for connecting distributed I/O via PROFINET
• PROFINET interface for network separation
• PROFIBUS DP interface for connecting distributed I/O via PROFIBUS