Parameters For The Profinet Connection - Siemens SIMATIC S7-1200 Manual

7.5.4

Parameters for the PROFINET connection

The TSEND_C, TRCV_C and TCON instructions require that connection-related parameters
be specified in order to connect to the partner device. These parameters are specified by the
TCON_Param structure for the TCP, ISO-on-TCP and UDP protocols. Typically, you use the
"Configuration" tab of the "Properties" of the instruction to specify these parameters. If the
"Configuration" tab is not accessible, then you must specify the TCON_Param structure
programmatically.
Table 7- 6 Structure of the connection description (TCON_Param)
Byte Parameter and data type
0 ... 1 block_length
2 ... 3 id
4 connection_type
5 active_est
6 local_device_id
7 local_tsap_id_len
8 rem_subnet_id_len
9 rem_staddr_len
10 rem_tsap_id_len
11 next_staddr_len
Easy Book
Manual, 11/2011, A5E02486774-04
Description
UInt Length: 64 bytes (fixed)
CONN_OUC Reference to this connection: Range of values: 1 (default) to 4095.
(Word) Specify the value of this parameter for the TSEND_C, TRCV_C or
TCON instruction under ID.
USInt Connection type:
17: TCP (default)

18: ISO-on-TCP

19: UDP

Bool ID for the type of connection:
TCP and ISO-on-TCP:

–
–
UDP: FALSE

USInt ID for the local PROFINET or Industrial Ethernet interface:
1 (default)
USIn Length of parameter local_tsap_id used, in bytes; possible values:
TCP: 0 (active, default) or 2 (passive)

ISO-on-TCP: 2 to 16

UDP: 2

USInt This parameter is not used.
USInt Length of address of partner end point, in bytes:
0: unspecified (parameter rem_staddr is irrelevant)

4 (default): Valid IP address in parameter rem_staddr (only for

TCP and ISO-on-TCP)
USInt Length of parameter rem_tsap_id used, in bytes; possible values:
TCP: 0 (passive) or 2 (active, default)

ISO-on-TCP: 2 to 16

UDP: 0

USInt This parameter is not used.
Easy to communicate between devices
FALSE: Passive connection
TRUE: Active connection (default)
7.5 PROFINET
135