User Manual

Easy to communicate between devices
7.3 Number of asynchronous communication connections
Easy Book
Manual, 03/2014, A5E02486774-AF
131
7.3
Number of asynchronous communication connections
The CPU supports the following maximum number of simultaneous, asynchronous
communication connections for PROFINET and PROFIBUS:
● 8 connections for Open User Communications (active or passive): TSEND_C, TRCV_C,
TCON, TDISCON, TSEND, and TRCV.
● 3 CPU-to-CPU S7 connections for server GET/PUT data
● 8 CPU-to-CPU S7 connections for client GET/PUT data
Note
S7
-1200, S7-300, and S7-400 CPUs use the GET and PUT instructions for CPU-to-CPU
S7
communication. An S7-200 CPU uses ETHx_XFER instructions for CPU-to-CPU
S7
communication.
● HMI connections: You can configure the number of HMI connections required for your
application through the TIA Portal.
● PG connections: The CPU provides connections to support 1 programming device (PG).
● Web server (HTTP) connections: The CPU provides connections for the Web server.
Note
The Open User Communications, S7 connection, HMI, programming device, and Web server
(HTTP) communication connections may utilize multiple connection resources based upon
the features currently being used.