I need to change the value of the virtual device.
If you need to change a only single device then uses the syntax:

commandArray['UpdateDevice'] = DevID..'|0|'..value
It's alright.

If it is necessary to change the value of multiple devices syntax used:

commandArray[DevID1] = { ['UpdateDevice ...

OK : commandArray['UpdateDevice']='60|33.33|44.44'

Thanks

This site I have visited before but it did not help me:
script: /usr/share/domoticz/scripts/lua/script_device_topeni.lua
------------------------
pn = tonumber(otherdevices_svalues['Termostat_loznice_nastaveni'])
pt = tonumber(otherdevices_svalues['Termostat_loznice_teplota'])
if (pn < pt) then
os ...

I have virtual thermometer and need in LUA script set temperature value.
How to do it ?