...

This will set DOUT1 to High for Infinite time.

counting running engine hours

We would recommend to measure the power voltage when:

• ignition switch is OFF;
• ignition switch is ON and engine OFF (also called: accessory position);
• ignition switch is ON and engine IDLE.

A running engine implies higher power voltages than an engine switched off.

In the configuration then

• use the ignition source from power voltage and
• in the low voltage (mV) setup a bit more less than the voltage with running engine.

Then you will always see that Ignition value 1 only then when the engine is running.