Open User Communication
6.5 Setting up Open User Communication via TCP, ISO-on-TCP, UDP and ISO
Communication
78 Function Manual, 11/2019, A5E03735815-AH
6. Select an existing connection description DB in the "Connection data" drop-down list or
for configured connections select an existing connection under "Connection name". You
can also create a new connection description DB or a new configured connection. Later,
you can still select other connection description DBs or configured connections or change
the names of the connection description DBs in order to create new data blocks:
– You can also see the selected data block at the interconnection of the CONNECT
input parameter of the selected TCON, TSEND_C or TRCV_C instruction.
– If you have already specified a connection description DB for the connection partner
using the CONNECT parameter of the TCON, TSEND_C or TRCV_C instruction, you
can either use this DB or create a new DB.
– If you edit the name of the displayed data block in the drop-down list, a new data block
with the changed name but with the same structure and content is generated and
used for the connection.
– Changed names of a data block must be unique in the context of the communication
partner.
– A connection description DB must have the structure TCON_Param, TCON_IP_v4 or
TCON_IP_RFC, depending on CPU type and connection.
– A data block cannot be selected for an unspecified partner.
Additional values are determined and entered after the selection or creation of the
connection description DB or configured connection.
The following is valid for specified connection partners:
– ISO-on-TCP connection type
– Connection ID with default of 1
– Active connection establishment by local partner
– TSAP ID
for S7-1200/1500: E0.01.49.53.4F.6F.6E.54.43.50.2D.31
The following is valid for unspecified connection partners:
– TCP connection type
– Partner port 2000
The following applies for a configured connection with a specified connection partner:
– TCP connection type
– Connection ID with default of 257
– Active connection establishment by local partner
– Partner port 2000
The following applies for a configured connection with an unspecified connection partner:
– TCP connection type
– Local port 2000
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