Hello Edgar,
with our ECU data converter there is a advice in the manual in order to use the pump voltage.
Pump voltage is fast and accurate as a source for the flame out alarm.
We have a "Armed-Alarm" feature/process inside our converter. This avoids a wrong alarm during turbine preparation and start up.
Once you turbine has raised a certain amount of rpm, the alarming is armed in case of a 0Volt message from the turbine ECU.
So with other words the alarm concept relies very much on the design of your CORE ECU data converter.
BR
Dirk
CB Elektronics