We are controlling the current to an RS-485 bus with a FPF2700MX chip and we are sending some encoding signals over the bus from something to something else. for these which encoding technique we have to follow? else Manchester encoding is the only one technique we should follow?

 

Post the proposed schematic- I have no idea what you are attempting from the description alone.

 

You seem to be asking almost the same question as your other post.
The trick to getting good answers is to ask good questions. Like, give as much info and detail of what you are really trying to do as you can.
Your questions sound pretty guarded and vague to me.