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Produkte: WorkStation
Funktionen: BACnet
Produktversion: 2.0, 2.1, 3.0, 3.1, 3.2, 3.3, 2022, 2023
22.07.2021

Floating Point Values NaN, INF, and –INF

arrow1_rotationBasic Property Tab and Watch Window arrow1_rotationTrends

In the EcoStruxure Building Operation software, the floating point values “Not a Number”, positive infinity, or negative infinity may be displayed in the Basic property tab, in a trend log list, or a trend chart.

The IEEE standard for Floating-point Arithmetic representation is used for these values:

NaN: A floating point value meaning “Not a Number”. Support for NaN is provided for interoperability with other devices or systems that produce NaN values.

Positive Infinity or Negative Infinity: Floating point value, sometimes represented as Infinity, –Infinity, INF, or –INF. Support for positive and negative infinity is provided for interoperability with other devices or systems that produce these values.

Für weitere Informationen siehe Institute of Electrical and Electronics Engineers document IEEE 754 ..

Basic Property Tab and Watch Window

Certain object properties may display values representing “Not a Number”, positive infinity, or negative infinity. These values are displayed in accordance with the localization settings, observing capitalization and sign (positive or negative). The presentations of these values with English localization are shown in the table and examples below.

Tabelle: Display of Values

Value

Property Tab Presentation

Watch Window Presentation

Not a Number

NaN

NaN

Positive Infinity

Infinity

Infinity

Negative Infinity

–Infinity

–Infinity

In the Basic Property Tab

You can view property values representing “Not a Number”, positive infinity, or negative infinity in the Basic property tab.

 
action_zoom_plus_stroke Example of NaN, Infinity, or –Infinity Value Displayed in Basic Property Tab
Abbildung: Example of NaN, Infinity, or –Infinity Value Displayed in Basic Property Tab
In the Watch Window

You can monitor property values representing “Not a Number”, positive infinity, or negative infinity in the Watch Window.

 
action_zoom_plus_stroke Example of NaN, Infinity, or –Infinity Value Displayed in Watch Window
Abbildung: Example of NaN, Infinity, or –Infinity Value Displayed in Watch Window

Trends

Property values representing “Not a Number”, positive infinity, or negative infinity can be trended and displayed in the trend log and trend chart. The presentations of these values with English localization are shown in the table and examples below.

Tabelle: Presentation of Values

Value

Trend Log Presentation

Trend Chart Presentation

Not a Number

NaN

NaN

Positive Infinity

Infinity

INF

Negative Infinity

–Infinity

–INF

In the Trend Log List

You can view the trend data in a trend log list. Für weitere Informationen siehe Trend Log Lists .

 
action_zoom_plus_stroke NaN, Infinity, and –Infinity Displayed in Trend Log List
Abbildung: NaN, Infinity, and –Infinity Displayed in Trend Log List
In Trend Charts

You can view the trend data in a trend chart. Für weitere Informationen siehe Trend Charts .

When you select the Line option for a trend chart, the values are plotted on a line and displayed as abbreviations. You can view the complete value by hovering the pointer over any of these values. In the example that follows, the trend chart settings are set to Show markers so that it is easier to read the chart.

 
action_zoom_plus_stroke NaN, Infinity, and –Infinity Displayed in Trend Chart
Abbildung: NaN, Infinity, and –Infinity Displayed in Trend Chart

Component

Displayed Value

Tool Tip

 
action_zoom_plus_stroke

INF

 
action_zoom_plus_stroke

 
action_zoom_plus_stroke

–INF

 
action_zoom_plus_stroke

 
action_zoom_plus_stroke

NaN

 
action_zoom_plus_stroke

The same series can be presented in different ways by selecting the Discrete Line , Digital , or Bars option, as shown in the following examples. Für weitere Informationen siehe Trend Series .

 
action_zoom_plus_stroke Trend Chart with Discrete Line Display Option Selected
Abbildung: Trend Chart with Discrete Line Display Option Selected
 
action_zoom_plus_stroke Trend Chart with Digital Display Option Selected
Abbildung: Trend Chart with Digital Display Option Selected
 
action_zoom_plus_stroke Trend Chart with Bars Display Option Selected
Abbildung: Trend Chart with Bars Display Option Selected
  • Trend Charts
  • Trend Log Lists
  • Trend Series