The CPU 414-3 PN/DP is equipped with the following:
Powerful processor: The CPU achieves command execution times as low as 0.045 µs per binary instruction.
4 MB RAM (of which 2 MB each for program and data); fast RAM for parts of the user program relevant to execution.
Flexible expansion: Up to 131072 digital and 81932 analog inputs/outputs.
Multi-point interface MPI: With the MPI it is possible to establish simple networking of max. 32 stations at a data transmission rate of up to 12 Mbit/s. The CPUs can establish up to 32 connections to stations of the communication bus (C bus) and the MPI.
Mode selector switch: Designed as toggle switch.
Diagnostics buffer: The last error and interrupt events are retained in a ring buffer for diagnostic purposes. The number of entries can be parameterized.
Real-time clock: The date and time are appended to diagnostic messages of the CPUs.
Memory card: For expansion of the integrated load memory. The information in the load memory comprises S7-400 parameterization data in addition to the program and therefore requires twice as much memory space. The result is:
The integral load memory for large programs is not sufficient, therefore a memory card is frequently required. RAM and FEPROM cards (FEPROM for retentive storage) are available.
PROFIBUS DP interface and combined MPI/DP interface: The PROFIBUS DP master interface allows a distributed automation configuration offering high speed and ease of use. From the user's point of view, the distributed I/O is treated as central I/O (same configuring, addressing and programming). Mixed configuration: SIMATIC S5 and SIMATIC S7 as PROFIBUS master according to EN 50170.
Additional module slot: An additional PROFIBUS DP master system can be connected via the IF 964-DP interface module.
