Siemens SIMATIC S7-1500 Function Manual page 81

Open User Communication
6.5 Setting up Open User Communication via TCP, ISO-on-TCP, UDP and ISO
Configuring connections, e.g. for TSEND/TRCV
If you want to use the instructions for TSEND/TRCV for open communication, for example,
you first need to configure a connection (e.g. TCP connection).
To configure a TCP connection, follow these steps:
1. Configure the communications partners in the network view of the Devices & networks
editor of STEP 7.
2. Click the "Connections" button and select the "TCP connection" connection type from the
drop-down list.
3. Using drag-and-drop, connect the communication partner with each other (via an
interface or local end point). If the required S7 subnet does not yet exist, it is created
automatically.
You can also set up a connection to unspecified partners.
4. Select the created connection in the network view.
5. Set the properties of the connection in the "Properties" tab in the "General" area, for
example the name of the connection and the interfaces of the communications partner
that will be used.
For connections to an unspecified partner, set the address of the partner.
You can find the local ID (reference of the connection in the user program) in the "Local
ID" area.
6. In the Project tree, select the "Program blocks" folder for one of the CPUs and open OB1
in the folder by double-clicking on it. The program editor opens.
7. Select the required instruction from the "Instructions" task card, "Communication" area,
"Open user communication", for example TSEND and drag it to a network of OB1.
8. At the ID parameter of the instruction, assign the local ID of the configured connection to
be used for the transmission of data.
9. Interconnect the "DATA" parameter of the TSEND instruction with the user data, for
example in a data block.
10. Download the hardware configuration and user program to the CPU.
Based on the procedure described above, set up the connection on the partner CPU with the
instruction for receiving, TRCV, and download it to the CPU.
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Function Manual, 11/2019, A5E03735815-AH
Communication