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P026090: The actual power dissipation could not be calculated due to missing values

Cause

No value was entered for at least one of the following listed properties at the parts placement that are relevant for the power dissipation calculation:

  • Simultaneity factor (at devices)
  • Power dissipation (at devices)
  • Rail cross-section, Rail material, Conductivity (at +20 °C) and / or Temperature coefficient (at busbars).

Solution

  1. Locate the part placement in the layout space using the Go to (graphic) function from the popup menu in the Message management dialog.
  2. Call up the properties dialog of the part placement and check on the first tab whether one of the properties Power dissipation: Simultaneity factor (automatic) or Power dissipation: Simultaneity factor (device) is selected and has a value greater than 0 and smaller or equal to 1.

Note:

The value of the property Power dissipation: Simultaneity factor (automatic) is taken automatically from the project property Power dissipation: Simultaneity factor when a part is placed in the layout space. It is possible to define a simultaneity factor deviating from the project for the property Power dissipation: Simultaneity factor (device) for part placements. If you have entered a value in this field, this is also used by the property Power dissipation: Simultaneity factor (automatic). The value originating from the project is then overwritten. A power dissipation calculation cannot be carried out without the specification of a simultaneity factor.

  1. If the value is equal to 0 for both properties, either enter a valid value at the project property Power dissipation: Simultaneity factor or store the value at the property Power dissipation: Simultaneity factor (device) of the part placement.
  2. Also check whether a part is entered at the part placement that disposes of specification of the power dissipation.
  3. To this purpose bring the Parttab to the front in the properties dialog of the parts placement to the front and call up the Parts selection at the entered part.
  4. In the part selection bring the Properties tab to the front and check whether a value greater than 0 is entered at the Max. power dissipation field.
  5. If the value is missing, either select a different part or add the power dissipation at the part in the parts management and then select the part again.
  6. If the part placement is a busbar, check whether a value is entered for each of the following properties at the used part:

    - Rail cross-section
    - Rail material
    - Conductivity (at +20 °C)
    - Temperature coefficient.
  7. To this purpose open the part selection, change to the Properties and check whether a value greater than 0 is entered at the properties listed above.
  8. If not, enter the missing value for the busbar in the Parts management, and select the busbar part again afterwards.
  9. Recalculate the total power loss.

Note:

Using a new check run (any desired scheme) this module-specific message can be deleted from the message management dialog.