The CPU 1518-4 PN/DP is equipped with the following:

• A powerful processor:
  The CPU achieves command execution times as low as 1 ns per binary instruction.
• A large work memory:
  3 MB for program, 10 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)
• Display with functions for the
  • Display of overview information such as IP address of the integrated interface, station name, higher level designation, location designation, etc.,
  • Display of diagnostic information
  • Display of module information
  • Display of display settings
  • Display of a user-definable logo
  • Setting of IP addresses
  • Setting of date and time
  • Selection of the operating mode
  • Resetting of the CPU to factory settings
  • Disabling/enabling of the display
  • Enabling of protection levels
• PROFINET IO IRT interface for connecting distributed I/O via PROFINET
• Two PROFINET interfaces for network separation, for example
• PROFIBUS DP interface for connecting distributed I/O via PROFIBUS