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How are components placed in a schematic linked to a schematic library

jaza_tom

I'm confused about how components placed into a schematic sheet are linked to their corresponding schematic library components.

 

If I copy a component that is placed in a schematic sheet into a schematic library, add text, then clicking Update Schematics button, it updates the component that I have placed in the library.

 

If I then want to edit the component's Library Link property in the schematic library to suit my own naming conventions, it appears to break the link between the component in my schematic library and the one in the schematic sheet.


See video here:

https://youtu.be/dOybCmhlQDA

 

My question I guess is this:

 

Is it possible to edit the Library Link property of a component without breaking the link to any instances of that component that are placed in schematic sheets?

 

Also, is it possible to link a component placed in a schematic sheet to a component in a schematic library if the link does not already exist?

 

Is it possible to check if the link exists or not without trying to modify the component in the schematic library and apply those changes to schematics?

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  • 0

    When you change the Library Link property in the library editor you do break the link to the schematic, this is by design and the way it works. However you can reconnect from the schematic by using the object inspector. Change Design Item ID to match the new component (Library Link) name.

    image

    This technique (changing Design Item ID) is also useful if you want to replace components on the schematic without having to delete the existing ones and enter new ones from a library. Changing this property will update the component on the schematic to the one with the matching name from your library.

     

    Normally Symbol Reference will follow whatever is in Design Item ID, if there is a mismatch then updating from the library to the schematic will break so ensure they remain the same.

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  • 0

    When you change the Library Link property in the library editor you do break the link to the schematic, this is by design and the way it works. However you can reconnect from the schematic by using the object inspector. Change Design Item ID to match the new component (Library Link) name.

    image

    This technique (changing Design Item ID) is also useful if you want to replace components on the schematic without having to delete the existing ones and enter new ones from a library. Changing this property will update the component on the schematic to the one with the matching name from your library.

     

    Normally Symbol Reference will follow whatever is in Design Item ID, if there is a mismatch then updating from the library to the schematic will break so ensure they remain the same.

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