Relay Output points (digital)

Configures up to 16 digital Nrio relay output point terminals.

Figure 435. Relay Output, Configuration tab

You access this view from the Nrio Point Manager by clicking the Digital Points tab, followed by clicking the hyperlink on a Relay Output point.

Property	Value	Description
Facets	additional properties	Refer to Relay Out Facets.
Proxy Ext	additional properties	Refer to Relay out Proxy Ext properties.
Status	read-only	Reports the condition of the entity or process at last polling. `{ok}` indicates that the component is licensed and polling successfully. `{down}` indicates that the last check was unsuccessful, perhaps because of an incorrect property, or possibly loss of network connection. `{disabled}` indicates that the `Enable` property is set to `false`. `{fault}` indicates another problem. Refer to `Fault Cause` for more information.
In2-5, 7, and 9-16	`true` or `false`, defaults to `false`	Configures the amount of voltage coming from each of 16 inputs. When null is checked, the value displayed defaults to the incoming value from the device. If you remove the check mark you can configure the `In` value.
Fallback	`true` or `false`, defaults to `false`	Pre-defines and output value in case of a null input.
Override Expiration	Date and time drop-down lists.	Defines an expiration date and time.
Min Active Time	hours, minutes, seconds	Specifies a minimum amount of time that a device must run once it is started.
Min Inactive Time	hours, minutes, seconds	Specifies a minimum amount of time that a device must be idle once it is stopped.
Set Min Inactive Time On Start	`true` or `false`, defaults to `false`	Configures the system to set the minimum inactive time when the station starts. Minimum active and inactive times prevent short-cycling of equipment controlled by a point.

Relay Out Facets

As a Boolean writable, these proxy points support two states, which default to true or false.

Figure 436. Relay Output Configuration Facets

You use this window to configure different text (other than true and false) when the station writes this Boolean value.

Relay out Proxy Ext properties

The proxy extension properties are the same as those documented for other Nrio proxy points.

Figure 437. Relay Out Proxy Ext properties

In addition to the standard properties (Status, Fault Cause and Enabled), the relay out proxy extension provides these properties

Property	Value	Description
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. NOTE: In most cases, the standard `Default` conversion is best. `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.
Tuning Policy Name	drop-down list (defaults to `Default Policy`)	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.
Read Value	read-only	Displays the last value read from the device, expressed in device facets.
Write Value	read-only (applies to writable types only)	Displays the last value written using device facets.
Poll Frequency	drop-down list (defaults to `Normal`)	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.
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. 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.