Separate Cadence sensor and Power Meter sensor

What kind of powermeter do You have? And which protocol is used, ANT+ or BT? Can You share a FIT file with this issue?

actually it power sensor from smart trainer but have no cadence. It's connected to garmin as smart trainer, buat I need connect it as power sensor. Some Connect IQ app can not read power data if it not pair as power sensor. 

Using a separate cadence sensor will do what you want.

have try it, on 830 when I pair power meter as sensor cadance data will get from power metee sensor not from cadance sensor.

I have a power meter and cadence sensor paired to my 830.  I get the cadence data from the cadence sensor.

What power meter do you have?  What cadence sensor do you have.  Are they paired via BT or ANT+

power sensor came from smart trainer, paired with ant+ , far as I know if I connect power sensor , cadance data came from power sensor. I have cadance sensor paired too but 830 not read data from cadance sensor ( magane speed/cadance sensor )