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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
Total number of connections on Industrial
Ethernet
Number of connections for S7 communication
on Industrial Ethernet
Number of ISO transport connections
Maximum data length for AG_SEND and
AG_RECV blocks
Maximum data length for AG_LSEND and
AG_LRECV blocks
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).
Product information CP 343–1
C79000–Z8964–C038–05
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Explanation / Values
32 maximum
The actual value depends on the CPU type
being used. Please refer to /1/ for the values
for your CPU.
16 maximum
AG_SEND and AG_RECV allow the transfer
of data fields of between 1 and 240 bytes.
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 ).
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