Update modbus profile

[sx3]

Thanks.

Is it possible to set the profile to poll the read values even though it haven't changed?
I have a Gira Homeserver, KNX visualization, but I can't read the modbus values from the KNX bus, by sending a read request or read on init, when the server reboots.


I have tried script, but it returns 0, always.. even though the value should be greater!

Code:

-- init modbus on first script execution
if not mb then
     require('luamodbus')
     mb = luamodbus.rtu()
     mb:open('/dev/RS485', 9600, 'N', 8, 1, 'H')
     mb:connect()
end

-- sets slave ID to read/write data from/to
mb:setslave(1)

result=mb:readregisters(27)
grp.write('2/3/10',result)

mb:close()

I have disabled RTU, and the register adress is 4x00027.
The LM modbus profile can read this register, but it doesn't poll the value since it's not changed often, but I need to learn my KNX devices this value when they reboot or things like that.