User manual

Chapter Three Operation
man_905-105_2.9 Page 27
Analog Change-of-state
A "change-of-state" for an analog input, battery voltage or pulse input rate is a change in value of the
signal of 3% (configurable) since the last transmission. Note that the sensitivity of 3% refers to 3% of
the analog range, not 3% of the instantaneous analog value. That is, if an analog input changes from
64% (14.24 mA) to 67% (14.72 mA), a "change-of-state" will be detected. This “change-of-state”
sensitivity is configurable between 0.8% and 75%.
Analog inputs are digitally filtered to prevent multiple transmissions on continually varying or "noisy"
signals. The input is filtered with a 1 second time constant and a 1 second debounce. The analog
outputs are filtered with a 1 second time constant.
An example of an analog input and how the output follows it is shown below: