Product overview, functions
2.5 Configuration limits and performance data
CP 1543-1
18 Operating Instructions, 05/2017, C79000-G8976-C289-07
● Restrictions UDP broadcast / multicast)
To avoid overloading the CP due to high broadcast / multicast frame traffic, the receipt of
UDP broadcast / multicast on the CP is limited
● UDP frame buffering
Length of the frame buffer: At least 7360 bytes
Following a buffer overflow, newly arriving frames that are not fetched by the user
program are discarded.
Characteristics of S7 communication
S7 communication provides data transfer via the ISO Transport or ISO-on-TCP protocols.
Total number of freely usable S7 connections on
Max. 118
LAN interface - data field length generated by CP
per protocol data unit (PDU = protocol data unit)
• for sending: 480 bytes / PDU
• for receiving: 480 bytes / PDU
Number of reserved OP connections
Number of reserved PG connections
Number of reserved connections for Web
Note
Maximum values for an S7-1500 station
Depending on the CPU you are using, there are limit values for the S7
-
1500 station. Note the
information in the relevant documentation.