Siemens SIMATIC NET CP 343-1 - Manual (Page 9)

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7 Product information CP 343–1
C79000–Z8964–C038–05
1.2 Performance Data
1.2.1 Characteristics of S7 Communication
The functions and characteristics of S7 communication are described in /8/
and /11/.
1.2.2 Characteristics of ISO Transport Connections
The following information is important for operating ISO transport connections
(SEND/RECEIVE interface):
Table 4
Characteristic Explanation / Values
Total number of connections on Industrial
Ethernet 32 maximum
Number of connections for S7 communication
on Industrial Ethernet The actual value depends on the CPU type
being used. Please refer to /1/ for the values
for your CPU.
Number of ISO transport connections 16 maximum
Maximum data length for AG_SEND and
AG_RECV blocks AG_SEND and AG_RECV allow the transfer
of data fields of between 1 and 240 bytes.
Maximum data length for AG_LSEND and
AG_LRECV blocks AG_LSEND and AG_LRECV are shipped for
the CP 343–1 from version 5 or higher
(firmware V3.00) and permit the transfer of
data fields of between 1 and 8192 bytes (for
more detailed information, see Table 3 ).
Reaction Times of ISO Transport Connections
The calculation of the reaction times with ISO transport connections is deter-
mined by the run time of the function blocks required on the S7-300 CPU
(AG-SEND, AG–RECV).