Item type: Variable

User defined item, which can be written and read.

The Variable item type has the following properties:

NameDescriptionIDFlags
QualityItem 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.3ReadOnly
RightsItem 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.5ReadOnly
TimeThe date and time when this item was last updated.4ReadOnly
TypeThe item canonical data type - the specific type of this item. Whether it's an integer, string, date, etc.1ReadOnly
ValueThe current value of the item.2NormalPage
ValuetypeItem canonical datatype. This is the type of data the field holds. For example: integer, string, datetime, etc.10010Persisted, Enumerated

See also

Basic Item Properties

Predefined Item Properties

OPC DA Properties