Dear users,

I am trying to modify data type of logging tags from analog (the default) to real or string,

but this option is disable.Can i overvome this?

also i tried to convert the logged values written in varbinary to real from mdf file with no success.

anyone know how to do this?

I am using WINCC TIA v16.

Thanks

Hi,

I believe since WinCC Professional V16, archiving of string type tags has been supported.

Could you please share some screenshots to really see what could be happening?

Thanks,

thanks,

But, how i convert analog field to real number?

The analog data is a long hexadecimal number.

Hi,

my goal is to export the loggin data( in mdf files) to csv file with human readable values.

therefore i need to convert the analog datatype(hexadecimal) to numeric values.

Thanks

IN the PLC add a function that converts the tags you need to text. Then create a new log that stores your new tag.  The function for converting Hex to String is HTA.

but maybe to mean BCD? so in that case use CONVERT     -it is more common in my experience.

You may be able to copy the data Log and just change the new log to CSV.

Good Luck.