Defines how the system converts proxy extension units to parent point units.

Default automatically converts similar units (such as Fahrenheit to Celsius) within the proxy point.

Linear applies to voltage input, resistive input and voltage output writable points. Works with linear-acting devices. You use the Scale and Offset properties to convert the output value to a unit other than that defined by device facets.

Linear With Unit is an extension to the existing linear conversion property. This specifies whether the unit conversion should occur on “Device Value” or “Proxy Value”. The new linear with unit convertor, will have a property to indicate whether the unit conversion should take place before or after the scale/offset conversion.

Reverse Polarity applies only to Boolean input and relay output writable points. Reverses the logic of the hardware binary input or output.

500 Ohm Shunt applies to voltage input points only. It reads a 4-to-20mA sensor, where the Ui input requires a 500 ohm resistor wired across (shunting) the input terminals.

Tabular Thermistor applies to only a Thermistor input point and involves a custom resistance-to-temperature value response curve for Type 3 Thermistor temperature sensors.

Thermistor Type 3 applies to an Thermistor Input point, where this selection provides a “built-in” input resistance-to-temperature value response curve for Type 3 Thermistor temperature sensors.

Generic Tabular applies to non-linear support for devices other than for thermistor temperature sensors with units in temperature. Generic Tabular uses a lookup table method similar to the “Thermistor Tabular” conversion, but without predefined output units.

Selects a network tuning policy by name. This policy defines stale time and minimum and maximum update times.

During polling, the system uses the tuning policy to evaluate both write requests and the acceptability (freshness) of read requests.

Displays the last value read from the device, expressed in device facets.

Displays the last value written using device facets.

Selects among three rates (Fast, Normal and Slow) to determine how often to query the component for its value. The network’s Poll Service or Poll Scheduler defines these rates in hours, minutes and seconds. For example:

Fast may set polling frequency to every second.

Normal may set poll frequency to every five seconds.

Slow may set poll frequency to every 30 seconds.

This property applies to all proxy points.

Defines the point’s I/O terminal address based on its hardware type.

If duplicated (same instance as same hardware type, same board), the point reports a fault status.

If an edit attempt is made to an instance already in use by another proxy point, the system discards the edit, and retains the previous instance value.

Indicates the reason why a system object (network, device, component, extension, etc.) is not working (in fault). This property is empty unless a fault exists.