real time clock

I want to read the real time clock from a s7-224 siemens plc. The problem is I can't find a description how to do it. I read it with the read-RTC instruction , setting the T-byte at vb100, but when I read the different bytes (hour , minute) with a move byte instruction it doesn't match the real value, for example the seconds run untill 70. Does anyone know how i can read them as 16# because when i read them in the staus chart and select hex it matches.
Thanks

The CPU clock returns the value in BCD format, not as integer
value. It would be required to convert this with the BCD_to_Int
instruction.

The following library returns the clock values already as integer values.
http://www.s7-200.net/redirect.php?id=7

Thanks, I will check this out. I didn't even know there was such a site.