The value is bad but no specific reason is known
There is a server-specific problem with the configuration
The input is required to be logically connected to something but is not
A device failure has been detected
A sensor failure has been detected
Communications have failed. However, the last known value is available.
Communications have failed. No last known value is available.
The block is off scan or otherwise locked.
Either the value has reached one of the sensor limits (in which case the limit field should be set to 1 or 2) or the sensor is otherwise known to be out of calibration.
There is no specific reason why the value is uncertain.
The last usable value
The returned value is outside the limits defined for this parameter. Note that in this case, the limit flag indicates which limit has been exceeded.
The value is derived from multiple sources and has less than the required number of good sources.
The value is good
The value has been overridden. Typically this means the input has been disconnected and a manually defined value has been forced.