Siemens SIMATIC NET S7-400 - PROFINET IO and TCPIP Performance

Performance data
2.4 Characteristics of open TCP/IP communication
CP 443-1 (EX30)
24 Manual, 03/2019, C79000-G8976-C255-05
The maximum number of SPEED SEND/RECEIVE calls that can be used simultaneously
(FC53, FC63) depends only on the CPU (see above).
2.4
Characteristics of open TCP/IP communication
Open TCP/IP communication provides a program interface for the transfer of connection-
oriented and connectionless services. The establishment and termination of connections is
initiated here only via the "dynamic" program interface.
The CP supports communication via ISO-on-TCP connections for this interface.
Characteristic
Explanation / values
Number of dynamically generated connections over Indus-
trial Ethernet
• ISO-on-TCP connections: 1...64
Max. data length
1452 bytes
2.5
Characteristic data for PROFINET IO
PROFINET IO communication of the CP is IRTcompliant. The CP supports the following
maximum configuration as a PROFINET IO controller:
Characteristic
Explanation / values
Number of CPs that can be operated as PROFINET IO
controllers within an S7400 station
4
Number of possible PROFINET IO devices
*)
128
*)
, of which
• up to 64 in IRT mode
• up to 32 in "prioritized startup" mode
Size the input area over all PROFINET IO devices
4 KB max.
Size of the output area over all PROFINET IO devices
4 KB max.
Size of the IO data area per submodule of a module in an IO
device
• Inputs
• Outputs
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 configura-
tion 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 diagnostics buffer about lack of resources when downloading the
configuration data.