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The symbols in cadett ELSA mainly lives in four different and from each other separated “continents”, each with its own type of item designations:

 

▪Conventional devices

▪Terminals and connectors

▪PLC

▪Cables

 

The item designations of these four “continents” are composed separately. Therefore, they can vary a lot from each other.

 

Within each “continent”, you typically have:

 

▪Main symbols

▪Help symbols

▪Mirror symbols

 

Main symbols, help symbols, and mirror symbols are connected to each other with a common item designation. It is impossible to connect a help symbol with one type of item designation (within one “continent”) with a main symbol with another type (in another “continent”). A PLC help symbol can for instance never be connected to a cable main symbol, even if their item designations are identical.

 

In principle, the above give 4 x 3 = 12 different types of symbols. In addition, you can have potential references, living in a "continent" for themselves, and Sub-circuits, in yet another separated "continent".

 

This means that the Symbol Generator can deal with a total of 14 symbol types, according to a well-known relation in mathematics:

 

12 + 2 = 14