Generic symbols

...this article is under construction at the moment.

What is a generic symbol?

Some of the simple schematic symbols,

Are used by various components, e.g. the symbol of a NPN bipolar transistor is used in the components BC141, BC148, BD911 and so on.

Naturally transistors differ in voltage, power and so on while the symbol drawing is the same. It would be possible to furnish each component with an identical symbol but this would keep disadvantage...

• unnecessary consumption of disk space
• big administrative effort. Adaptions of the symbol drawing need to be carried out at every component using this particular symbol.
  
  

It would be better just to point at one generic centrally maintained symbol "NPN bipolar transistor".

Generic means some kind of a default, a specimen, a primitive, a basic form. A generic symbol only comes with a drawing and a name for example "Resistor", "Diode", "Capacitor". It does not have any further parameters.

• few disk space
• low administrative effort. The symbol is there only once and gets centrally maintained
• TARGET components can be furnished with custom made generic symbols

Display that a generic symbol is used

Image: Button G in the component browser

In the component browser some schematic symbols show a button "G" beside the DIN and IEEE switches. This button "G" is not a switch. It only points out that the schematic symbol is a generic one.

G in grey = generic symbol is a genuine TARGET generic.
G in black = generic symbol is from the user
G in red = generic symbol is from the user. It replaces the genuine assignment because of name identity.


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File:Generic9 e.png

Use a generic symbol

With a component new to be drawn

If you create a component newly you automatically will get asked whether to use a generic symbol. You should do so if possible. The procedure is explained here: Create a new component...

With an existing component

If a generic symbol in TARGET 3001! does not please you, you can create your own generic symbol. A TARGET component, using a generic symbol, can be defined to using a custom made generic symbol, which always preferably will be used. This preference takes place only if the symbol has the same name. The G-box then gets displayed in red.

You can give your own generic diode symbol the same name like in TARGET 3001!: Diode, or you may give it a different name, for example My Diode. In the first case your generic diode symbol will be used for all TARGET components, in the second case only with your (= user) components. That makes clear that the name of the generic symbol is the crucial aspect.

G in grey = generic symbol is a genuine TARGET-3001! generic.
G in black = generic symbol is from the user
G in red = generic symbol is from the user. It replaces the genuine assignment because of name identity.

Using a generic symbol while creating a new component

Please have a look here: Create new components

Administrate generic symbols

Please see component browser menu: "Extra/Edit generic symbols..."

Image: Component browser menu "Extra"

Image: Dialog Edit generic symbols

Image: List of the existing generic symbols

Save an existing non generic symbol as a generic

Open a context menu by a right mouseclick on a non generic symbol in the component browser:

Image: Context menu entry

Assign a generic symbol to an existing component

User component

In component browser click M2 on Symbol, the context menu opens. Select menu entry: "Assign a generic symbol to component <name>..."

TARGET-component

Component browser menu Extra/Edit generic symbols... Select the generic symbol which you like to assign from the list.

Attention: Pin assignment!! see below.

Pin assignment

If you intend to exchange a TARGET-generic by a custom one having the same name you need to take care for identical pin assignment. If e.g. a "Bridge rectifier" uses a TARGET-Generic symbol which shows its pin numbers 1(+), 2(~), 3(-), 4(~) please assign the pad numbers to your generic according to function.

Image: Open the dialog for Pin assignment in the component browser. Select "Pin assignment..."

Image: Use the list top right to assign pad numbers to the pin numbers

Pin 1 shows (+) so it shall be assigned to pad (1).
Pin 2 shows (~) so it shall be assigned either to pad (2) or (3).
Pin 3 shows (-) so it shall be assigned to pad (4).
Pin 4 shows (~) so it shall be assigned either to pad (3) or (2).