I'm trying to publish sensor values via BACnet. There are occasions when I cannot contact the sensor and I want to remove the current value for the bacnet object.

I had tried to remove the present value property of the bacnet object and an exception was promptly thrown. I traced this back to the fact that the present value property is required. Ok, so I looked at the other primitive data types and saw Null. So my next thought was to set the present value to a Null value however the BACnet code doesn't like that for analog inputs.

Is there a concept of an input not having a present value in BACnet?

As always, thanks for the help.

Fred