Voltage Input tab

This view provides tabs for editing and configuring Nrio proxy points under the points extension of a selected Nrio module.

Figure 376. Voltage Input tab, all properties expanded

You access this view from the main menu by clicking Controller Setup > Remote Devices > Remote Drivers, followed by double-clicking the NrioNetwork driver, selecting and double-clicking a module, clicking the Point Manager button, and clicking the hyperlink to the right end of a point row (the example shows a voltage input point.

opens the Add Point Extension window for adding extensions to the selected point.

You can add Alarm Source extensions, History Extensions, and create links between appropriate points using standard assign Mode features.

Extension properties are sensitive to point types (digital, analog, output, input).

The Out section of the Voltage Input tab reports the current value of the proxy point and its status.

Voltage Input Facets

Facets determine how a point’s value displays in the station. Voltage Input facets include voltage numbers and decimal precision.

Figure 377. Voltage Input Facets and Edit facets window

The Edit window opens when you click the Edit button.

Property	Value	Description
Quantity
max	number	Defines the maximum voltage value.
min	number	Defines the minimum voltage value.
precision	number	Defines the number of decimal places allowed.
units	defaults to Volts	Configures the default unit.

Voltage Proxy Ext properties

These properties configure the proxy point extension.

Figure 378. Voltage Proxy Ext properties

Property	Value	Description
Status	read-only	Reports the condition of the entity or process at last polling. {ok} indicates that the entity is licensed and polling successfully. {down} indicates that the last poll was unsuccessful, perhaps because of an incorrect property. {disabled} indicates that the Enable property is set to false. {fault} indicates another problem. Depending on conditions, multiple status flags may be set including {fault} and {disabled}, combined with {down}, {alarm}, {stale}, and {unackedAlarm}.
Fault Cause	read-only	Reports the reason why a network, component, or extension is in fault. Fault Cause is blank unless a fault exists.
Enabled	`true` or `false`	Turns the feature on (true) and off (false).
Conversion	drop-down list, defaults to `Default`	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. `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.
Tuning Policy Name	drop-down list, defaults to `Default Policy`.	Identifies the assigned tuning policy. During polling, the system uses such collections of rules to evaluate both write requests and the acceptability (freshness) of read requests.
Read Value	read-only	Reports the last value read using device facets.
Write Value	read-only	Reports the last value written using device facets. Applies only to writable points.
Poll Frequency	drop-down list, defaults to `Normal`	`Fast` sets polling frequency to every second. `Normal` sets poll frequency to every five seconds. `Slow` sets poll frequency to every 30 seconds.
Instance	number	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.
Ui Type	read-only	Identifies the Nrio Universal Input point type: Resistive Input, Boolean Output, etc.

Voltage Input, Linear Calibration Ext properties

These properties configure the linear calculation that yields the Out value.

Figure 379. Linear Calibration properties

Property	Value	Description
Scale	number, defaults to 1.0	Part of a formula for converting voltage to something other than Volts. This also involves changing value facets.
Offset	positive or negative number, defaults to 0.0	Works with `Scale` to convert voltage to something other than Volts. This property is useful to compensate for signal error introduced by sensor wiring resistance.
Units, Quantity	drop-down list
Units	drop-down list	Should be the same as the parent proxy point’s facets.
Fault Cause	read-only	Reports the reason why a network, component, or extension is in fault. Fault Cause is blank unless a fault exists.