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How to

How to


Products: AS-B, Edge Server, Enterprise Central, Enterprise Server, AS-P, Virtual Project Servers
Functionalities: Localization
Product version: 2024, 7.0
12/3/2024

Adding or Changing a Unit and Prefix for a Value

You define and change the unit and its prefix for a value to ensure that the value is correct calculated.

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The EcoStruxure Building Operation software supports both the SI metric system and the US Customary System for units of measurement.

There are four optional ways to display units:

  • As MS Windows

  • As configured in object

  • International System of Units (Metric)

  • United States Customary Units (US)

For example, the temperature 42,82 °C is stored in the EcoStruxure Building Operation software. A WorkStation on an operating system with the US Customary System converts the temperature and displays it as 109.08 °F.

As MS Windows

By default, values are converted into the unit given by the regional settings of the operating system.

As configured in object

Units displayed as configured in the object means that no conversion is done. The unit the user selected when creating, for example, a trend log is displayed regardless of regional settings. When this option is selected, the unit conversion exceptions feature is disabled.

International System of Units (Metric)

Values displayed in International System of Units means that the values are converted into metric unit regardless of the unit the object was given when created.

United States Customary Units (US)

Values displayed in United States Customary Units means that the values are converted into US unit regardless of the unit the object was given when created.

When you select a different unit system, the values are converted immediately.

Values are not converted in the following WorkStation screens:

  • Alarms and trend logs in wizards

  • Customized alarm views

  • Alarm and trend log properties panes

Delta Temperature Conversion

Important:

  • The EcoStruxure Building Operation software converts the unit of a variable independent of its context. To correctly convert a delta temperature, the unit of the delta value must belong to the unit category Temperature Diff.

The conversion between ​Celsius and Fahrenheit or ​Fahrenheit and Kelvin is not a simple ​coefficient (multiplier) like other unit categories as for example length, pressure, currency, and Energy. Due to the conversion formula when for example converting an absolute ​Fahrenheit temperature to Celsius​, T​°F=T​°C x 9/5 + 32, ​ you have both a multiplier and an offset to consider. To correctly convert a delta temperature from ​​Fahrenheit to ​Celsius​ you have to use the formula ΔT°F = 9/5 ΔT°C.

For more information, see Delta Temperature Conversion .

To add or change a unit and prefix for a value

  1. In WorkStation, in the System Tree pane, select the value or point you want to configure.

  2. On the File menu, click Properties .

  3. In the Basic tab, click the Configuration button

     
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    .

  4. In the Configuration tab, select Unit .

  5. In the Unit box, enter the unit.

  6. In the Prefix box, select the prefix of the unit.

  7. Click Select .

  8. In the Value dialog box, click OK .

  9. In the Properties dialog box, click OK .

See Also

  • Regional and Language Overview
  • Units
  • Metric Prefixes
  • Precision Format
  • Select Unit Dialog Box
  • WorkStation does not Display Correct Values