The CPU 417-4 is the most powerful SIMATIC S7-400 CPU. The integral PROFIBUS DP interfaces permit direct connection to the PROFIBUS DP fieldbus as master or slave.
Two further DP master systems can be connected via the IF 964-DP interface submodules.
Note : Only the interface module 6ES7 964-2AA04-0AB0 can be used.
Design
The CPU 417-4 has:
Powerful processor: The CPU achieves instruction execution times as low as 0.018 µs per binary instruction.
30 MB RAM (of which 15 MB each for program and data); fast RAM for parts of the user program relevant to execution.
Flexible expansion: Up to 262144 digital and 16384 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 CPU can establish up to 44 connections to stations of the communications bus (C bus) and the MPI. Note: If the PROFIBUS DP interface and MPI interface are operated simultaneously, it is only possible to connect the following bus connector to the MPI interface:
With socket: 6ES7 972-0BB41-0XA0
Without socket: 6ES7 972-0BA41-0XA0
Mode selector switch: Designed as toggle switch.
Diagnostics buffer: The last 120 fault and interrupt events are retained in a ring buffer for diagnostic purposes (extendable).
Real-time clock: The date and time are appended to diagnostic messages of the CPU.
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 is not sufficient for large programs, therefore a memory card is frequently required. RAM and FEPROM cards (FEPROM for retentive storage) are available
PROFIBUS 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 with SIMATIC S7 as PROFIBUS master to EN 50170. Note: If the PROFIBUS DP and MPI interface are operated simultaneously, it is only possible to connect the following bus connectors to the MPI interface:
With socket: 6ES7 972-0BB41-0XA0
Without socket: 6ES7 972-0BA41-0XA0
Two additional slots: Two additional PROFIBUS DP master systems can be connected via IF 964-DP interface modules.
Functions
Block protection: a password concept also protects the user program from unauthorized access
Integrated HMI services: The user only has to specify the source and destination of the data with HMI devices. The data are then transported cyclically and automatically by the system.
Integrated communication functions:
PG/OP communication
Global data communication
S7 standard communication
S7 communication
Configurable Attributes
The STEP 7 tool "Hardware configuration" can be used to program the properties and response of the S7-400 including the CPUs, e.g.
Multipoint interface MPI:
Definition of node addresses
Startup/cycle behavior
Stipulation of the maximum cycle time and communication load
Address allocation: Addressing of I/O modules
Retentive area: Definition of the number of retentive bit memories, counters, timers, data blocks, and clock memories
Size of the process image, local data
Length of the diagnostics buffer
Protection level: Definition of access authorizations to program and data
System diagnostics: Definition of the handling and scope of diagnostics messages
Timed interrupts: Setting of periods
Configuring
Reporting functions
Status and fault indicators: LEDs indicate internal and external faults and operating modes such RUN, STOP, restart, test function, etc.
Test functions: The PG can be used to display signal states in program execution, modify process tags irrespective of the user program, read out the contents of stack memories, run separate program steps and inhibit program components.
Information functions: The PG can be used to provide the user with information about the memory capacity and operating mode of the CPU, and the current utilization of the working and load memories.
