Siemens S7-400 - Characteristics of Open TCP;IP Communication

Performance data
2.4 Characteristics of open TCP/IP communication
CP 443-1 Advanced
Equipment Manual, 03/2023, C79000-G8976-C256-07
25
Table 2- 1 Dependency of the maximum number of RECEIVE calls long (AG_LRECV FC60) used at the same time on the
number of SEND calls (CPU 412/414)
Number of simultaneous
SEND calls
0 1 2 3, 4 5 6 7 8, 9 10 11 12
Max. number of
simultaneous FC60s per
CPU 412/414
19
18
17
16
15
14
13
12
11
10
9
Table 2- 2 Dependency of the maximum number of RECEIVE calls long (AG_LRECV FC60) used at the same time on the
number of SEND calls (CPU 416/417)
Number of simultaneous
SEND calls
0 1 2 3, 4 5 6 7 8, 9 10 11 12 13,
14
15 16
Max. number of
simultaneous FC60s per
CPU 416/417/41x-H
51
50
49
48
47
46
45
44
43
42
41
40
39
38
Number of simultaneous
SEND calls
17
18,
19
20
21
22
23,
24
25
26
27
28,
29
30
31
32
Max. number of
simultaneous FC60s per
CPU 416/417/41x-H
37 36 35 34 33 32 31 30 29 28 27 26 25
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.
Table 2- 3 Open TCP/IP communication
Characteristic
Explanation / values
Number of dynamically generated connections over
Industrial Ethernet
• ISO-on-TCP connections: 1...64
Max. data length
1452 bytes