Open User Communication
6.3 Instructions for Open User Communication
Communication
Function Manual, 05/2021, A5E03735815-AJ
117
Protocol
System data type
Instructions
Modbus TCP
•
TCON_IP_v4
•
TCON_QDN
•
TCON_Configured
•
MB_CLIENT
•
MB_SERVER
•
TMAIL_v4
•
TMAIL_v6
•
TMAIL_FQDN
•
TMAIL_C
FTP
2
•
FTP_CONNECT_IPV4
3
•
FTP_CONNECT_IPV6
3
•
FTP_CONNECT_NAME
3
•
FTP_CMD
1
This protocol can only be used with the CM 1542-5
2
This protocol can only be used with the CP 1543-1
3
User-defined data type
The following table shows you the different connections of the Secure Open User
Communication and the matching system data types and instructions.
Secure OUC connection
System data type
Instructions
Secure TCP connection from an
S7-1500 CPU as TLS client to a
third-party PLC (TLS server)
Secure TCP connection from an
S7-1500 CPU as TLS server to a
third-party PLC (TLS client)
•
TCON_QDN_SEC
•
TSEND_C/TRCV_C
•
TCON, TSEND/TRCV
Secure TCP connection between
two S7-1500 stations
•
TCON_IP_V4_SEC
1
Secure connection to a mail serv-
er
2
•
TMAIL_V4_SEC
•
TMAIL_QDN_SEC
•
TMAIL_C (V5.0 or higher)
Secure Modbus TCP connection
•
TCON_IP_V4_SEC
1
•
MB_Client
•
MB_Server
•
TCON_QDN_SEC
1
Also possible for CP 1543-1
2
Secure connection to a mail server also possible with CP1543-1 und TMAIL_C (V4.0)
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