BottomUpEngineering

In the Top Down engineering approach you  first creates a specification and then you implement you specification based on the Logical Nodes of an IEDs.

In case of reverse engineering or for other reasons a bottom up approach may be preferred. STS not only supports this approach but also allows to document the different ways.

In this example we show how to document the usage of Logical Nodes in an IED that have not been specified first.

Open the Function Specification.

Note: The Measuring function contains contain a Logical Node for the calculation of currents and voltages for protection purposes, but now we want also to add some Metering values which have not been specified upfront.

Double Click on the IED to open the Mapping Dialog. The bottomUp engineering is done within the context "IED to specification"

Select the MMTR metering Logical Node and select to add it to the Function Measurement

Observe that STS has placed the new measuring Logical Nodes in the Function group "Measurement". The chain element indicates that the Logical Node is mapped.

The yellow colour however indicates that the Logical Node has been added from the implementation without being specified previously.

Parent topic: Map Logical Nodes To IEDs

Previous topic: Manual Mapping of Logical Nodes