Are you able to show the DB data (with a screenshot) for the CONF_DATA input parameter?

Did you build the datatypes for that DB's "ConfData" Struct, or did you manually build the equivalent Structs?  I'm assuming it was the equivalent structs, which is not correct.

From TIA Portal F1-Help: Parameter CONF_DATA

Create the system data types IF_CONF_HEADER, IF_CONF_V4, IF_CONF_NOS, IF_CONF_NTP, IF_CONF_V6, IF_CONF_MAC and IF_CONF_DNS be entering the name of the system data type in the "Data type" column of the data block or the block interface.
The name for the system data types can be freely assigned.
The system data types can be combined in any order.

It should be something like this in "Data_block_1".Config:

Data Block "Data_block_1"
Config : STRUCT
  Header : IF_CONF_HEADER
  IPData : IF_CONF_V4
  NoS    : IF_CONF_NOS
  NTP    : IF_CONF_NTP
  IP_V6  : IF_CONF_V6
  MAC    : IF_CONF_MAC
  DNS    : IF_CONF_DNS
END_STRUCT;

Is that what you have?

If so, what is the value of "Data_block_1".Config.Header.FieldType?  It needs to be 0.

If data_block_1:config.header is not of datatype "IF_CONF_HEADER", then FieldType is not going to be found, so T_CONFIG should report an error.

AutoGen_7106194

Hello

I need some help. I am trying to change the IP address of the CPU (S7-1214c PLC) with the program, using T_Config? Is it possible?

I have been trying but to no success, I have used Siemens examples, and does not work. Also other examples in Forums, but to no avail.

Attached is the code and the error, at least one of them, because it also shows, 

C080_8800 0001_0000 Error in the system data type IF_CONF_HEADER:

The parameter FieldType has an invalid value. Use the value "0" for FieldType.

Although it is 0 is the tag. HW interface is 64 as per program, and it is selected IP set at the device in the configuration

Can anyone help?

Thanks

pedro

Set the subnet mask bytes to 255/255/255/0 and if you require a router / gateway device, provide the ip to that as well.

AutoGen_7106194

Thanks for your reply

Yes, I didd all you are suggesting, Check Attached.

The error changes a little, and now is that there is some invalid parameter in the DB.

But the majoraty of times its the FiledID not 0, which in fact is 

Pedro