Siemens SIMATIC NET CP 443-1 Advanced - Page 25

Performance data
2.3 SEND/RECEIVE interface
CP 443-1 Advanced (GX30)
Manual, 03/2019, C79000-G8976-C256-05
25
The following characteristics are important:
Characteristic
Explanation / values
Number of SEND/RECEIVE connections
• TCP connections: 1...64
1) 2)
• ISO-on-TCP connections: 1...64
• ISO transport connections: 1...64
• Total number of UDP connections (specified and free) that can be
configured: 1 to 64 (of those up to 48 in multicast mode)
• E-mail connection: 1
• Max. number of connections in total:
(ISO transport and ISOonTCP
+ TCP + UDP + e-mail) <= 64
Refer to the example in section 5.1 (Page 23)
Notes:
•
1)
Avoiding receive overload
The flow control on TCP connections
cannot
control permanent over-
load of the recipient. You should therefore make sure that the pro-
cessing capabilities of a receiving CP are not permanently exceeded
by the sender (approximately 150200 messages per second).
•
2)
TCP connections for FTP
Of the available TCP connections, a maximum of 20 TCP connections
can be configured / used with the "Use FTP protocol" option (see sec-
tion 5.7 (Page 36)).
Number of SEND/RECV connections in
SPEED SEND/RECV mode
The number depends on the CPU type being used.
• Per CPU 412/414 maximum 30
• Per CPU 416/417 maximum 62
Maximum data length for AG_SEND and
AG_RECV program blocks
AG_SEND and AG_RECV were shipped with predecessors of the CP and
allow the transfer of user data with a length from 1 to 240 bytes. The
version of the CP described here continues to support these blocks.
Maximum data length for AG_LSEND and
AG_LRECV program blocks
AG_LSEND and AG_LRECV allow the transfer of user data with the fol-
lowing lengths:
1. ISO-on-TCP, TCP, ISO transport: 1 to 8192 bytes
2. UDP: 1 to 2048 bytes
3. E-mail (job header + user data): 1 to 8192 bytes