<< Click to Display Table of Contents >> 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.
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".
Criteria |
Condition 1 |
Condition 2 |
Condition 3 |
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Number series |
Zero number |
Terminal number |
Terminal number |
Connection type |
All |
3 |
4 |
Dimension |
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Colour |
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Node name |
|
|
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Signal/potential name |
|
|
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Function (plant) |
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Location |
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Product |
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Complete item designation |
|
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Between numbering areas |
No |
No |
No |