> For the complete documentation index, see [llms.txt](https://docs.videc.de/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.videc.de/acron-9.3/en/anlagenkonfiguration/verfahrensgroessen.md).
# Process variables
Process variable (PV) is the generic term for different logging data types. You can assign multiple different process variables to an external variable, to obtain different analyses by the compression methods for example.
Select the process variable type when creating a new one. You can convert existing process variables into a different type.
## Process variable group
Process variables are organized in groups. Grouping brings multiple variables together to form a larger unit, making structures clearer and more concise when there are large numbers of process variables.
Process variables can be moved within the groups by [drag & drop](/acron-9.3/en/erklaerung_zur_bedienung.md#drag-drop).
### Name
Name of the process variable group
## Icons
| Icon | Meaning | Icon | Meaning | Icon | Meaning |
| -------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------- | ---------------------------------------------------- | -------------------------------- | ------------------------------------------------------ |
|  | Group | | | | |
|  | [Auto variable](/acron-9.3/en/anlagenkonfiguration/verfahrensgroessen/autogroesse.md) |  | External auto variable with active connection |  | External auto variable with inactive connection |
|  | [Manual variable](/acron-9.3/en/anlagenkonfiguration/verfahrensgroessen/handgroesse.md) |  | External manual variable with active connection |  | External manual variable with inactive connection |
|  | [Standard calculation variable](/acron-9.3/en/anlagenkonfiguration/verfahrensgroessen/rechengroesse/register_allgemein.md#rgstandard) |  | External calculation variable with active connection |  | External calculation variable with inactive connection |
|  | [Temporary calculation variable](/acron-9.3/en/anlagenkonfiguration/verfahrensgroessen/rechengroesse/register_allgemein.md#rgtemporaer) | | | | |
|  | [Live calculation variable](/acron-9.3/en/anlagenkonfiguration/verfahrensgroessen/rechengroesse/register_allgemein.md#rglive) |  | External calculation variable with active connection |  | External calculation variable with inactive connection |
|  | [Key figure](/acron-9.3/en/anlagenkonfiguration/verfahrensgroessen/kennzahl.md) | | | | |
---
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