Fronius Symo Modbus float model registers for dyn power reduction

[Jusufs]

Hi,
my question isn’t about home-assistant implementation, but generally modbus oriented.
I’m searching for modbus register numbers for controlling dynamic power reduction mechanism.
In float model I found some registers.

I thing service modifications via browser aren’t implemented in modbus.
It’s possible to only set a % amount of max avalliable power with enable/disable modbus telegrams ?
Export limit protection set limit values haven’t equivalent as modbus telegramms or ?

This is a automation mechanism, that computed maximum inverter power dynamically according Fronius meter “feeding into grid” value. Above method needs to compute in external algorithm the necessary max power.
Thank’s for help.

[mxcxpx]

so i want to limit my Battery Output to the minimum when the dynumic power price is at low cost.

what i found out to set via Modbus to the register 40309 (fronius symo hybrid)
StorCtl_Mod = 0 (Standart) ; 1 only discharge allowed ; 2 only charging allowed

40316 OutWRte 10000 (=100%) 100 (=1%)
40317 InWRte 10000 (is standart)

so sending via modbus in register 40309 → 2
and
in register 40316 → 100

will reduse the discharging level to 1% of the battery capacity

capacity 8000Wh → 1% is 80watt

[mxcxpx]

so this was first milestone. now how to get it in Home assistant as an automation

tibber current price reach low level send value to modbus

i have no idea how to do that