Trans OPC Item
An OPC item with automatic calculation of a linear transformation.
The Trans OPC Item item type has the following properties:
| Name | Description | ID | Flags |
|---|---|---|---|
| ActiveInServer | True when this item is active in the OPC server. | 10110 | ReadOnly, ExpertPage |
| Client handle | The client handle of the item, as registered with the OPC sever. When negative, the item has not been accepted by the OPC server. | 10160 | ReadOnly, InfoPage |
| LocalOverrideToBad | If true, a "good:local" override item quality from the server will be remapped to a "bad" quality. | 10130 | Persisted, ExpertPage |
| 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 |
| ReqVartype | The type requested from the server for the value of this item. Only change this property in special circumstances. | 10100 | Persisted, Enumerated, ExpertPage |
| 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 |
| SrcItemID | The item ID in the source. This is the item ID this item uses to fetch data from the source. | 5030 | 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 |
| Value | The current value of the item. | 2 | NormalPage |