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Nodes with No Inputs or Outputs

This analysis rule includes the node elements that have no inputs or no outputs or both. In a Sigmafine model, node elements are used to represent objects like tanks, manifolds, processing units and any point at which material streams meet and diverge. In-service node elements in a Model with no inventory flowing in or out over a Case run are suspect to this test and can indicate a modeling connectivity error or a missed input or output.

The following table lists a sample log output for this analysis.

Sample Log

TimeSeverityElementAttributeMessage
7/25/2005 13:22…REPORTING NODES WITHOUT VALID SOURCE/DEST
7/25/2005 13:22Node without inputsNodeANodeA has no inputs.
7/25/2005 13:22Node without outputsNodeBNodeB has no inputs.
7/25/2005 13:22Node without inputsNodeCNodeC has no inputs.
7/25/2005 13:22Node without outputsNodeDNodeD has no outputs.

Analysis Method​

  1. Collect a list of all node elements in the current Case that satisfy the following criteria.
  • Element service status is IS (in Service)
  1. Check the connections for each in-service node. Report any Element that does not have the following:
  • Input connections
  • Output connections

Configuration Using the Wizard​

The configuration of the Nodes with no Inputs or Outputs calculation is a selection of the General Gross Error Analysis Rule. You open the window for configuring the test (shown in the following figure) from the General Gross Error Analysis Rule Wizard.

  1. Open the Gross Error Configuration window as described in Configuring - General Gross Error Analysis Rule.

  2. On the Nodes tab, select Nodes with no inputs or outputs.

    A Nodes with no inputs or outputs - Attributes window opens.Figure 400: Nodes with no inputs or outputs - Attributes window

  3. Select the Attribute that represents the In-Service Status. The following table provides a description.

    Attributes

    SelectionsDescription
    StatusNode in/out of service status. The default is 'ObjectStatus'.

  4. Click OK to finish the configuration.

    The text "CONFIGURED" displays next to the 'Nodes with no inputs or outputs' selection.

  5. To run this test, see Running the General Gross Error Analysis.