5 Performance Data / Operation
B−28
CP 443-1 for Industrial Ethernet / Manual Part B
Release 07/2010
C79000-G8976-C223−06
5.5 PROFINET IO
5.5.1 Characteristic data
PROFINET IO communication of the CP as of hardware version 3 is
IRT-compliant. The CP supports the following maximum configuration as a
PROFINET IO controller:
Table 5-7
Characteristic
Explanation / values
Number of CPs that can be operated as PROFINET IO controllers
within an S7-400 station
4
Number of possible PROFINET IO devices
*)
128, of which
S 128 in IRT mode
S 32 in ”Prioritized startup”
mode
Size of the input area over all PROFINET IO devices 4 Kbytes max.
Size the output area over all PROFINET IO devices 4 Kbytes max.
Size of the IO data area per submodule of a module in an IO device
S Inputs
S Outputs
This information also applies to operation with a shared device
240 bytes
240 bytes
Size of the consistency area for a submodule 240 bytes
*) The number of operable PROFINET IO devices can be reduced if the devices being used require extensive
configuration and parameter assignment data due to large numbers of submodules. In this case, the
memory on the CP will not be adequate and you will receive a message in the diagnostic buffer about lack
of resources when downloading the configuration data.
Notice
Note the following for PROFINET IO: If you use modules with >=32 bytes of
input/output data, this can lead to I/O access errors; access errors are entered in
the diagnostic buffer of the CPU.
These I/O errors occur during operation only in the “consistent user data“ mode
and at a low OB1 cycle time.
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