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The CPU 314 is equipped with the following:

• Microprocessor;
  the processor achieves a processing time of approximately 60 ns per binary instruction and 0.59 µs per floating-point operation.
• Extensive memory;
  128 KB high-speed RAM (corresponds to approx. 42 K instructions) for program sections relevant to execution offers sufficient space for user programs;
  SIMATIC Micro Memory Cards (max. 8 MB) as load memory for the program also allow the project to be stored in the CPU (complete with symbols and comments).
• Flexible expansion capability;
  max. 32 modules, (4-tier installation)
• MPI multi-point interface;
  the integrated MPI interface can establish as many as 12 connections simultaneously to S7-300/400 or to programming devices, PCs, OPs. Of these connections, one is always reserved for programming devices and another for OPs. The MPI makes it possible to set up a simple network with a maximum of 16 CPUs via "global data communication".