Help Modbus config

Hi.
I am trying to get all functions to work in modbus from my ventilationsystem.
I have succseded with most of the function but i have 2 functions that uses the same adress and i don´t know how i will accomplish this to work in homeassistant. One of the fuctions is to control overpressure with coil. And it works well.

- name: "Overpressure"
        slave: 2
        address: 3
        write_type: coil
        verify:

Then with the same adress using Holding Register i can control fan speed rang from 0-100 and get respons. Have this working in Homeseer that im trying migrate from.

Any idéa how i schould do to make this work?
Feels like i have tried every example in the Hass Modbus manual.

mod 2 mod1