Siemens ET 200SP Operating Instructions Manual page 96

Programming (OUC)
5.1 Program blocks for OUC
Connection descriptions in system data types (SDTs)
For the connection description, the blocks listed above use the parameter CONNECT (or
MAIL_ADDR_PARAM with TMAIL_C). The connection description is stored in a data block
whose structure is specified by the system data type (SDT).
Creating an SDT for the data blocks
You create the SDT required for every connection description as a data block. You generate
the SDT type in STEP 7 by entering the name (e.g. "TCON_Param") in the "Data type" box
manually in the declaration table of block instead of selecting an entry from the "Data type"
drop-down list. The corresponding SDT is then created with its parameters.
Depending on the security functions supported, the three CP types support the following
SDTs:
SDTs for all three CP types
The following SDTs can be used by all three CP types:
● TCON_Param
For transferring frames via TCP
● TADDR_Param
For transferring frames via UDP
● TCON_IP_RFC
For transferring frames via ISO-on-TCP
● TMail_V4
For transferring e-mails addressing the e-mail server using an IPv4 address
● TMail_V6
For transferring e-mails addressing the e-mail server using an IPv6 address
● TMail_FQDN
For transferring e-mails addressing the e-mail server using the host name
You will find the description of the SDTs with their parameters in the STEP 7 information
system under the relevant name of the SDT.
SDT for CP 1542SP-1 IRC and CP 1543SP-1
These two CP types can use the following SDT for e-mail connections with Security function:
● TMail_V4_SEC
For secure transfer of e-mails addressing the e-mail server using an IPv4 address
● TMail_QDN_SEC
For secure transfer of e-mails addressing the e-mail server using the host name
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CP 1542SP-1, CP 1542SP-1 IRC, CP 1543SP-1
Operating Instructions, 01/2017, C79000-G8976-C426-03