Thursday, 11 April 2013

Controlling the Azure Dynamics Air Conditioning Compressor


Thanks to  Weisheimer from the EVTV forums for pointing me to the diagnostic software.

The Compressors ID is 0x439 as I had found by connecting only the compressor to a Can Spy.

Now I have the other piece of the puzzle. The compressor is controlled by can ID 0x410.

Below are the key messages controlling the compressor.

SIGNAL NAME, ID, NODE Start, Width, Res, Offset,Sign, Min, Max, Unit
target_compressor_speed  410 accm 8 8 60 0 False 0 15180 rpm
max_pwr_consumption      410 accm 0  8 0.1 0 False 0 25.3 kW
compressor_on_off       410 accm 46 1 1 0 False 0 1  Boolean
CASS_on_off              410 accm 43 1 1   0 False 0 1 Boolean
warmup_cycle_cntr_incr  410 accm 41 1 1   0 False 0 1  Boolean

And sent by the compressor
COMPRESSOR_STATUS     439 accm 56 2 1   0 False 0 3 enum ACTUAL_COMPRESSOR_SPEED 439 accm 48 8 60  0 False 0 15180 rpm
ACTUAL_POWER_CONSUMPTION 439 accm 40 8 0.1 0 False 0 25.3  kW
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