neoVI PRO Stand Alone Mode - Bus Decoder (Normal Mode)

Specifications and Theory of Operation

The  neoVI PRO runs Vehicle Spy normally. This includes reading hardware, decoding messages, processing diagnostic jobs. Every loop time (2 milliseconds), all analog outputs are calculated and updated. The analog output calculation uses the latest value of the signal.

The signal value is scaled to the analog outputs as follows. First, if the signal is not valid because the message was never received the output will be zero. If the signal is valid it will be scaled so that its min and max are scaled to the 0.5 to 5.0v range.

Figure A-9:The Analog Output Scaling Equation

For example, if the signal temperature's minimum is -40, the voltage output at -40 will be 0.5V.

Signals are scaled to 0.5V offset to allow you to determine signal validity from the voltage signal. If the voltage is less than 0.5V you know immediately that your data is invalid.

Figure A-10:Signal Scaling