Properties
A WITS item, built from raw data or measurement elements
The WITSItem item type has the following properties:
| Name | Description | ID | Flags |
|---|---|---|---|
| Description | A description of what this item does. This is free text, so you can write anything you like here. | 101 | Persisted |
| Direction | Direction of data. Input (false) or Output (true). | 5040 | Persisted |
| Field | The field of the item. | 5037 | Persisted |
| Offset | The linear transformation addend to use when calculating and item value. (Value = RawValue * Scale + Offset) | 5006 | Persisted |
| Quality | Item quality - this tells you whether an item currently has a good or bad quality. It might be bad, for example, because it isn't connected or is set to the wrong type. | 3 | ReadOnly |
| Record | The record of the item. | 5036 | Persisted |
| Rights | Item access rights - this property may be "read", or "read write". This means that the property may only be read from, or also can be written to. For OPC items, this written value will be passed on to the external items this item comes from. | 5 | ReadOnly |
| Scale | The linear transformation multiplier to use when calculating the item value. (Value = RawValue * Scale + Offset) | 5005 | Persisted |
| Time | The date and time when this item was last updated. | 4 | ReadOnly |
| Type | The item canonical data type - the specific type of this item. Whether it's an integer, string, date, etc. | 1 | ReadOnly |
| Unit | EU units - this is the unit this item value uses. For example: centimetres, kilograms, kilowatts, etc. | 100 | Persisted |
| Value | The current value of the item. | 2 | ReadOnly |
| Valuetype | Item canonical datatype. This is the type of data the field holds. For example: integer, string, datetime, etc. | 10010 | Persisted, Enumerated |