Number Of Asynchronous Communication Connections Supported; Profinet; Local/Partner Connection - Siemens SIMATIC S7 System Manual
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- System manual (866 pages) ,
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103BCommunication
10.1 Number of asynchronous communication connections supported
10.1
Number of asynchronous communication connections supported
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,
● 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: The CPU provides dedicated HMI connections to support up to 3 HMI
● PG connections: The CPU provides connections to support 1 programming device (PG).
● Webserver (HTTP) connections: The CPU provides connections for the Webserver.
10.2
PROFINET
10.2.1
Local/Partner connection
A Local / Partner (remote) connection defines a logical assignment of two communication
partners to establish communication services. A connection defines the following:
● Communication partners involved (One active, one passive)
● Type of connection (for example, a PLC, HMI, or device connection)
● Connection path
Communication partners execute the instructions to set up and establish the communication
connection. You use parameters to specify the active and passive communication end point
partners. After the connection is set up and established, it is automatically maintained and
monitored by the CPU. Refer to the section on "Configuring the Local/Partner connection"
(Page 118) for information about configuring the parameters for the connection.
If the connection is terminated (for example, due to a line break), the active partner attempts
to re-establish the configured connection. You do not have to execute the communication
instruction again.
394
TCON, TDISCON, TSEND, and TRCV.
devices. (You can have up to 2 SIMATIC Comfort panels.) The total number of HMI is
affected by the types of HMI panels in your configuration. For example, you could have
up to three SIMATIC Basic panels connected to your CPU, or you could have up to two
SIMATIC Comfort panels with one additional Basic panel.
S7-1200 Programmable controller
System Manual, 11/2011, A5E02486680-05
- Quick Links:
- Introducing the S7-1200 Plc
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