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Update schematics from schematic library strips added parameters

jaza_tom

I think there is a problem with CircuitStudio, or at least in my understanding of how to use CircuitStudio to manage generic parts (like resistors, for example).

 

Here is a video that shows the problem:

https://youtu.be/FgHOMr96urA

 

Boils down to this:

 

  • Place a component from a local library
  • Edit some of the schematic sheet placed component's parameters (for example, its resistance Value parameter)
  • Edit the component in the schematic library (e.g. add text to graphical display)
  • Click Udpdate Schematics button
  • All parameters that you have just added or altered are now overwritten/deleted and replace with a clone of the parameters of the schematic library component

 

If this is the expected behavior of the Update Schematics button then can someone please explain to me how to use generic components that get their parameters changed when placed in a schematic sheet (i.e. generic 0805 resistor that gets placed and then assigned a value).

  • 0

    Thanks for the very interesting question. This can be solved by breaking the synchronisation link between the library component and the schematic for selected parameters. In the library editor example below the resistance value is set using a parameter ("value") and the Edit dialog is used to prevent the value in the schematic being overwritten whenever the component is updated.

    image

  • 0

    Peter's answer is the best one as it address your question but bear in mind that the philosophy behind Altium libraries is that every component (every value) has to be individual in the library and not an universal one.

     

    Having to do the edit mentioned by Peter may be OK for a small schematic but doing it for a complex schematic will be tedious.

    Not to mention that each component has to have an parameter with the manufacturer PN, Farnell PN (or Digikey, Mouser, TME etc) and so on, which will make sourcing easier if you do it as a hobby and a mandatory requirement for professionals.

     

    I also add for each component the HelpURL parameter having as value the URL for the datasheet which make it easy to access the datasheet from the schematic: you just hover the mouse over the symbol and hit F1 key and the datasheet is opened in the browser.

     

    It may seem easier at the first glance to just use, let's say, one resistor and then copy it over the schematic, but in the long run it is better to make for each one, a component in your library.

  • 0 in reply to mars01

      wrote:

    It may seem easier at the first glance to just use, let's say, one resistor and then copy it over the schematic, but in the long run it is better to make for each one, a component in your library.

    OK taken under advisement!

     

    @Peter Barnard thanks for your response as well.  Looks like I have some options here.