Initial COV increment and period will only apply if a BACnet client subscribes to COV notification from the BACnet object assigned to this Modbus map. These properties may be overwritten by the BACnet client(s) at any time. The values shown here are initial values, not necessarily the current values. (Note: COV increment only applies to Analog objects, all changes are reported for Binary or Multistate objects.)

Units default to no_units, but you may select any of the available BACnetEngineeringUnits values. This value will simply be read by the BACnet client when the units property is requested from the object this Modbus register maps to. The units have no bearing on calculations performed. You must select appropriate scale and offset values to make any required translation between input units and BACnet units. Units are only valid for Analog objects; however, the discrete inputs are treated as analog since they are most often used for pulse counting or frequency measurement.