Schneider AHI0812 HART Module - Configuration Fault

[whitecatshiro]

Hi All,

I am testing a Derived Function Block to read in the Analog/HART values from the AHI0812 Device DDT.

I only have one physical connection wired up to Channel 0, however, I have left all the remaining Analog/Hart channels Enabled in the Module Configuration and the HART DTM.

The HART module is on a DIO rack, and I am testing loss of comms from the CRA module of that DIO rack.

When I lose comms from the CRA (unplugging cable) and re-establish comms to the CRA (replugging cable), I notice that the bit 5 (CONF_FLT) of the MOD_FLT byte in the AH0812 Device DDT becomes TRUE momentarily before returning back to FALSE. 

Upon establishing reconnection to the CRA module, I am not expecting any Faults from the AHI0812 module. 

Why does the Configuration Fault on the AHI0812 module become TRUE momentarily upon re-established connection to a CRA module?