ti 505 , ctr, tmr instructions box

I 'm trying to convert a TI program to Step 7;
i'm looking for a manual or someone who can explain me some simple ti istructions (overall CTR counter, TMR timer),like what are the input on these instructions box?

thank you

Here's a link to the 505 web page: http://www.sea.siemens.com/automat/product/plc/505/au505man.html

The programming reference should be all you need.

thanks, it is what i need