hola, buenos días y bienvenidos a node-red,
My spanish is not good but I think I understand your question.
If i am reading this correctly, you are getting integer values from modbus nodes an need to convert them to float?
I wrote a node node-red-contrib-buffer-parser to do that and much more...
It permits you to do this: modbus data --> buffer-parser --> any value you want
Please see this thread - the user has almost the requirement as you.
If you get stuck, post screen shots of your flow and debug messages & export your flow for us.
