arhi wrote: so only to do some setp in mcode that would change it .. or there's a way to link output of scale to parameter?
Ah, sorry, no. I may have sent you on the wrong track again.
Parameters can only be set by the "setp" command, they can't be part of a net.
So, perhaps the way to do this is with a custom M-code:
linuxcnc.org/docs/2.7/html/gcode/m-code.html#mcode:m100-m199
