Measure symbols
These are numeric representations of analog registers; they are useful for representing values of various kinds, for example the temperature of a furnace, the power of a transformer, the pressure in a pipe, etc.
Structure
The main group of the symbol’s SVG file contains an eq-symbol attribute whose value is measure. Through this attribute, the system identifies all symbols of this type included in the Display.
Within this group we find the following:
- Text with the eq-data attribute: Its value matches the current value of the input or output register to which the symbol is assigned.
- Static content: Other graphic elements that do not change appearance in relation to the registers associated with the symbol. For example: additional decoration, frames, background colors, etc.
Parameters of the “eq-data” attribute
| Parameter | Description |
|---|---|
| type | Indicates the symbol type; matches what is specified in the parent group’s " eq-symbol" attribute under the “type” parameter. |
Example: kilovolt meter
As we can see, all its elements are part of a group with the eq-symbol attribute. Some of them are static, such as those visible on the left of the diagram; the <text> element with the eq-data attribute, on the other hand, is dynamic. It changes its content according to the current value of the point to which the symbol is associated. There is another element of the <text> type corresponding to the text kV; however, this is part of the static content and does not change, since it does not have the eq-data attribute defined.
