5 Performance Data
B4A−26
CP 443-1 Advanced for Industrial Ethernet / Manual Part B4A
Release 01/2007
C79000-G8976-C193-06
Table 5-3 , continued
Characteristic Explanation / Values
Performance
AG_LSEND and AG_LRECV
Note: In this test constellation, a head station sends data to 8
partner stations as fast as possible over a separate
connection to each station.
S Blocks of data ≤ 212 bytes:
ISO−on−TCP, TCP,
UDP, ISO transport: 315 messages/s
S Blocks of data 213−240 bytes:
ISO−on−TCP, TCP,
UDP, ISO transport: 190 messages/s
S Blocks of data < 800 bytes
1)
:
ISO−on−TCP, TCP,
UDP,ISO transport: 75 messages/s
1)
Note:
A further increase in the user data length reduces the
specified performance.
Restrictions for UDP
S Transfer is not confirmed The transmission of UDP frames is unconfirmed, in other
words the loss of messages is not detected or displayed by
the send blocks (AG_SEND or AG_LSEND).
S Data field length The maximum length of the data fields is 2048 bytes.
S No reception of UDP broadcast To avoid overload resulting from a high broadcast load, the
CP does not permit reception of UDP broadcast.
As an alternative, use multicast mode over a UDP connection;
this gives you the opportunity of registering the CP specifically
as a member of a multicast group.
LAN interface − data field length
generated by CP per protocol data unit
S sending
ISO−Transport, ISO−on−TCP, TCP: 400 bytes / TPDU
S receiving
− ISO transport: 512 bytes / TPDU
− ISO−on−TCP: 1460 bytes / TPDU
− TCP: 1024 bytes / TPDU
Notice
If you use the SEND/RECEIVE interface on the CP, one(!) system connection
resource is used by S7 functions. Remember this in conjunction with the maximum
number of CPU connection resources. Remember also that it is not normally
possible to use all the system connection resources available for S7 functions for
CPs.
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