Siemens SIMATIC NET S7-400 - S7 Communication Performance

Performance data
2.2 Characteristics of S7 communication
CP 443-1 (EX30)
20 Manual, 03/2019, C79000-G8976-C255-05
2.2
Characteristics of S7 communication
S7 communication provides data transfer via the ISO Transport or ISO-on-TCP protocols.
Characteristic
Explanation / values
Total number of S7 connections on Industrial
Ethernet
128 max.,
of those max. 62 H connections
LAN interface - data field length generated by CP
per protocol data unit
• sending
• receiving
480 bytes / PDU
480 bytes / PDU
• Number of PG connections
• Number of OP connections
2 max.
30 max.
Note
Effects of connections in the SPEED SEND/RECV mode
Note the effects of connections on the SEND/RECEIVE interface that are used in the
SPEED SEND/RECEIVE mode.
The maximum configuration limits of S7 communication are reduced by each configured
connection using the SPEED SEND/RECV mode.