When you define a Genie, you can add a prefix or suffix to a Genie property to generate the complete tag when the Genie is used. For example, you could define a Genie property as follows:
%tag%_PV
If you then use "DEV1" for the tag, the Genie will generate the complete tag:
DEV1_PV
This is also the case if you reference the variable tag using the associated equipment and item name:
%equipment.item%_PV
If you use "PUMP.SPEED" for equipment.item, the Genie will generate the complete tag:
PUMP.SPEED_PV
You can add extra information at the beginning (prefix), or on the end (suffix) of the Genie property, or use both a prefix and suffix in the same Genie property. For example, if you have defined a loop controller with three bar graphs (created using the fill property in a rectangle) to display the tags DEV1_PV, DEV1_SP and DEV1_OP, you can configure a Genie as follows:
|
Level expression |
%PV_Tag% |
|
Level expression |
%SP_Tag% |
|
Level expression |
%OP_Tag% |
This configuration means each rectangle has a separate Genie tag.
When you configure the Genie (with the Genie dialog), you have to enter three separate tags: DEV1_PV, DEV1_SP and DEV1_OP. However, if you use structured tags, you can configure the rectangles as follows:
|
Level expression |
%Tag%_PV |
|
Level expression |
%Tag%_SP |
|
Level expression |
%Tag%_OP |
In this case, you only have to enter one tag (DEV1) to generate six objects. The Genie automatically concatenates DEV1 with either _PV, _SP, or _OP, depending on where the tag is substituted. As well as a reduction in configuration time, this Genie is easier to maintain.
Note: The above example illustrates the power of Genies. The more complex and the greater number of objects in a Genie, the greater the advantage of using structured tags. You can also make complex Genies by using multiple variables for a Genie property. For example, "%Level%_TIC_%Occ%_PV" or any combination of prefix, suffix and number of Genie variables.
See Also
Published June 2018