Name: Siemens SIMATIC S7-1200 CP 1243-8 IRC
Brand: Siemens
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Program blocks

5.2 Changing the IP address during runtime

CP 1243-8 IRC

Operating Instructions, 02/2018, C79000-G8976-C385-03

169

●

TMail_V6_SEC

For secure transfer of e-mails addressing the e-mail server using an IPv6 address

●

TMail_QDN_SEC

For secure transfer of 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.

Connection establishment and termination

Connections are established using the program block TCON. Note that a separate program

block TCON must be called for each connection.

A separate connection must be established for each communications partner even if

identical blocks of data are being sent.

After a successful transfer of the data, a connection can be terminated. A connection is also

terminated by calling TDISCON.

Note

Connection abort

If an existing connection is aborted by the communications partner or due to disturbances on

the network, the connection must also be terminated by calling TDISCON. Make sure that

you take this into account in your programming.

5.2

Changing the IP address during runtime

You can change the following address parameters of the CP at runtime controlled by the

program:

● IP address

● Subnet mask

● Router address

Note

Changing the IP parameters with a dynamic IP address

Note the effects of program

-controlled changes to the IP parameters if the CP obtains a

dynamic IP address from the Internet service provider: In this case, the CP can no

longer be

reached by communications partners.

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Siemens SIMATIC S7-1200 CP 1243-8 IRC Specifications

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