The CPU 315F-2 PN/DP is equipped with the following:

• Microprocessor:
  The processor achieves an execution time of approximately 50 ns per binary instruction and 450 ns per floating-point operation.
• Memory:
  512 KB high-speed RAM for safety-relevant and standard program sections; increased memory space requirements must be expected (5 times larger) if safety-relevant program sections are implemented. SIMATIC Micro Memory Cards (max. 8 MB) as load memories for programs additionally permit storage of the project (including symbols and comments) in the CPU.
• Flexible expansion capability;
  max. 32 modules, (4-tier configuration)
• Combined MPI/DP interface;
  The first MPI/DP integrated interface can establish as many as 16 connections simultaneously to S7-300/400 or connections to PG, PC, OP. Among these connections, one is always reserved for programming devices and another for OPs. A simple network with up to 32 CPUs can be configured with the MPI interfaces and "global data communication". The MPI interface can be reconfigured from an MPI to a DP interface. The DP interface can be used as a DP master or as a DP slave.
  PROFIBUS DP interface:
  The PROFIBUS DP V1 standard is fully supported. This increases the scope of DP V1 standard slaves in terms of diagnostics and parameterization capability.
• Ethernet interface;
  the second integral interface of the CPU 315-2 PN/DP is a PROFINET interface with 2-port switch based on Ethernet TCP/IP. It supports the following protocols:
  
  • S7 communication for data communication between SIMATIC controllers;
  • PG/OP communication for programming, startup and diagnostics through STEP 7;
  • PG/OP communication for interfacing to HMI and SCADA;
  • Open TCP/IP communication over PROFINET and SIMATIC NET OPC server for communication with other controllers and I/O devices with a separate CPU.