Siemens SIMATIC NET CP 443-1 Advanced Manual page 27

Limitation by the CPU
In productive operation, the number of SEND/RECEIVE calls that can be used at one time
depends on the CPU resources being used. Note the information on the available CPU
resources in section System environment (Page 41). The following CPU resources are
required:
● Per SEND job short (AG_SEND) or long (AG_LSEND): 1 send resource
● Per RECEIVE job short (AG_RECV): 1 receive resource
● Per RECEIVE job long (AG_LRECV): 1 send resource, 1 receive resource
● Per SPEED SEND/RECV job (AG_SSEND, AG_SRECV): 0 resources
Limitation by the CP
A maximum of 64 SEND/RECEIVE connections can be operated by the CP. At an
assignment of 1 CP per CPU, the maximum number of SEND/RECEIVE calls that can be
used at one time is limited as follows:
● SEND calls short (AG_SEND):
CPU 416/417: max. 64 calls per CPU
CPU 412/414: max. 24 calls per CPU
● SEND calls long (AG_LSEND):
CPU 416/417: max. 32 calls per CPU
CPU 412/414: max. 12 calls per CPU
● RECEIVE calls short (AG_RECV):
CPU 416/417: max. 64 calls per CPU
CPU 412/414: max. 24 calls per CPU
● RECEIVE calls long (AG_LRECV): variable
The number of AG_LRECV program blocks that can be used at the same time depends
on the number of SEND calls active at the same time (see tables below).
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
Max. number of simultane-
ous FC60s per CPU 412/414
CP 443-1 Advanced (GX30)
Manual, 03/2019, C79000-G8976-C256-05
0 1 2 3, 4
19 18 17
5 6
16 15 14 13
Performance data
2.3 SEND/RECEIVE interface
7 8, 9 10 11
12 11 10
12
9
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