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AVEVA Pipeline Operations for Liquids

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Use the Tank Manual Overrides dialog

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  • Last UpdatedApr 24, 2025
  • 3 minute read

Data is typically collected from the tank and entered directly into the RealTime database (RTDB) tank table. However, this process can be interrupted by placing a point into manual override mode.

When the device is in manual override mode, it will override values specified by the configuration (that is, telemetered point associated or an entry from the list selected) and is entered into the RTDB tank table.

Note: The value entered as manually overridden data has no effect on the output value or the state of the tank.

Use the Tank Manual Overrides dialog to override the temperature, tank level, snow load, or density of the tank.

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The following table lists the action items and fields on the Tank Manual Overrides dialog.

Fields

Description

Tank Number

The tank assigned number.

Level Format

This field indicates the level fraction format used to display all the Level values in the tank eXtended Operator Station (ezXOS) displays, alarm limits, and alarm messages.

Current (Temperature)

The current temperature in the tank. This is displayed in the units selected as part of the unit profile.

Temperature: Manual Override, Override

To use a manually entered temperature value:

  1. Under Temperature, select Manual Override.

  2. In the Override field under Temperature, enter the manual value.

  3. Select Submit.

    The current value is not changed unless you select Submit.

Current (Tank Level)

The current level in the tank. This level is converted to a gross volume using a volume conversion table (strapping table).

Tank Level: Manual Override, Override

To use a manually entered tank level value:

  1. Under Tank Level, select Manual Override.

  2. In the Override field under Tank Level, enter the manual value.

  3. Select Submit.

    The current value is not changed unless you select Submit.

    Note: The Tank Level needs to be entered as an uncorrected field level.

    Current (Snow Load)

    The current snow load weight in the tank.

    New Value (Snow Load)

    There is no telemetered value for the tank snow load.

    However, you can enter a snow load weight manually.

    To manually enter a snow load weight:

    1. In the New Value field under Snow Load, enter a displacement value in bbl.

    2. Select Submit.

      If roof correction is being performed, the snow load weight is added to the roof weight. Otherwise, it is simply used by itself. Snow load correction is performed using the same algorithm as roof weight correction.

      The Administrator can also configure the snow load, as described in the AVEVA Pipeline Operations for Liquids Administrator documentation.

      Current (Density)

      The current density in the tank. This is displayed in the units selected as part of the unit profile.

      Density: Manual Override, Override

      To use a manually entered, observed density value:

      1. Under Density, select Manual Override.

      2. In the Override field under Density, enter the manual value.

      3. Enter Submit.

        The current value is not changed unless you enter Submit.

        Note: Tank Level can only be controlled manually when they are configured by an Administrator to use a Direct Field Source in the Source Type and have a Remote Type of Level.