Siemens S7-300 appendix Open communication via Industrial Ethernet Requirements, Functionality

Communication

3.2 Communication services

Detailed Information

For detailed descriptions of the individual system status lists, refer to the manual System Software for S7-300/400 System and Standard Functions.

3.2.10.4Open communication via Industrial Ethernet

Requirements

•CPU 31x-2 PN/DP with firmware version 2.2.0 or higher:

•STEP 7 V5.3 + Servicepack 1 or higher

Functionality

CPUs with Firmware V2.3.0 or higher and integrated PROFINET interface support the open communication functionality via Industrial Ethernet (in short: open IE communication)

Open IE communication is always handled directly via TCP/IP.

How to use open IE communication

To be able to exchange data with other TCP/IP-compatible communication partners by means of the user program, STEP 7 provides four FBs and one UDT for the configuration of your connection:

•FB 63 "TSEND", for sending data

•FB 64 "TRCV", for receiving data

•FB 65 "TCON", for connecting

•FB 66 "TDISCON", for disconnecting

•UDT 65 "TCON_PAR" contains the data structure for the configuration of your connection.

Data block for the configuration of the connection

TCP/IP communication is connection-oriented. Data can only be transferred when a connection to the communication partner is established. The CPU supports multiple parallel connections to a communication partner.

To configure your connection, you need to create a DB that contains the data structure of UDT 65 "TCON_PAR." This data structure contains all parameters you need to establish the connection. You need to create such a data structure for each connection, and you can also organize it in a global DB (for example, ARRAY[1..8] "T_ADDR_INFO".)

Connection parameter CONNECT of FB 65 "TCON" reports the address of the corresponding connection description to the user program (for example, P#DBa.DBXb.c byte 64).

3-24	CPU 31xC and CPU 31x, Technical data
	Manual, Edition 08/2004, A5E00105475-05