Requirements For Use; Configuration Limits; System Environment - Siemens S7-400 Equipment Manual

Requirements for use

3.1

Configuration limits

When using the CP type described here, the following limits apply:
• Number of operable CPs within a rack: 14
The CP can only be inserted in expansion racks up to number 6.
• Number of CPs operating as PROFINET IO controllers within an S7 station: 4
The CP cannot be used as PROFINET IO controller in an expansion rack.
Note
Number of CPs that can be operated as PROFINET IO controller
The number of CPs operating as PROFINET IO controllers depends on the number of
CP 443-5 Extended modules operating as DP masters in the S7-400 station. A total of 10 CPs
can be operated as controllers for the distributed I/O (PROFINET IO controllers or DP masters);
of those, however, only up to 4 as PROFINET IO controllers.
Note the following regarding multiprocessor mode: When operating the CP as a PROFINET IO
controller, only the process image of the assigned CPU can be distributed via the CP.
3.2

System environment

General requirements
• The CP is released with CPUs as of firmware version V4.1.
– CPUs with firmware version 4.0 must be upgraded to V4.1.
– CPUs with firmware version 5.0 must be upgraded to V5.1.
• Open TCP/IP communication is supported by all CPUs as of firmware version V4.1.
• H communication
Supported with an H-CPU as of firmware version 4.5. For CPUs with firmware version < V6,
the CP works as a CPU proxy.
• The full range of functions (MRP, IRT, prioritized startup) is only available with CPUs as of
firmware version V5.2.
For more information about the required version of the STEP 7 configuration tool, refer to
section Project engineering (Page 34).
CP 443-1 Advanced
Equipment Manual, 03/2023, C79000-G8976-C256-07
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