Example 1 (traditional Swedish numbering)

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Example 1 (traditional Swedish numbering)

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The first example that is presented here is used for a traditional Swedish way of numbering, where wires between devices receive numbers with "0" as prefix, counted from 1 and incremented by 1 for each wire, so-called "zero-numbering". Wires to terminals, on the other hand, are numbered using the number of the terminal that the wire is connected to.

 

Figure 1844: One number series si enough in the first example.

Figure 1844: One number series si enough in the first example.

 

Two number series, and three condition lines are needed to accomplish that. One number series called Zero number with type Counter is defined as described, with a prefix of 0, a start value of 1, and a step value of 1. Please refer to the figure above. A second number series called Terminal number has the type Terminal number, which means that the number of the a connected terminal is used as wire-number, and that no start or step values are used.

 

The first condition states that all wires are numbered using the series named Zero number. The second condition states an exception for wires between devices and terminals, which will be numbered according to a number series named Terminal number. The third condition states an exception for wires between terminals as well, which also will be numbered according to the Terminal number number series.

 

Figure 1845: Three conditions are required to accomplish traditional Swedish "zero-numbering".

Figure 1845: Three conditions are required to accomplish traditional Swedish "zero-numbering".

 

Criteria

Condition 1

Condition 2

Condition 3

Number series

Zero number

Terminal number

Terminal number

Connection type

All

3

4

Dimension

 

 

 

Colour

 

 

 

Node name

 

 

 

Signal/potential name

 

 

 

Function (plant)

 

 

 

Location

 

 

 

Product

 

 

 

Complete item designation

 

 

 

Between numbering areas

No

No

No