Hello,
Briefly we have a PT-100 sensor at the temperature input and get voltage output from 0.250 to 4.75 V in our application.
We would like to implement a sensor break diagnostic and for this we have done the following settings from the GUI.
Diagnostic Enable : 0x1
AFEDIAG_CFG : 0x7
AFEDIAG BIT MASK : 0x4 ( Only the TINP+ OV).
FAULT VALUE: 5 V
In case of a sensor break, TINP+ goes to 2.5V and TINP- goes to GND in our curcuit.
When we break the sensor for testing, the output goes to the FAULT VALUE as expected but never get backs to normal value after we reconnect the sensor.
The only way to reset this condition is to make a power off and on cycle to the circuit.
Is it a normal behavior? We could not find any explanation about this behavior in the datasheet
We would expect a recover from the error state after we reconnect the sensor while the circuit is operating.
Best Regard,