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The configuration dialog box of objects of the Device type consists of several parts (tabs), which contain similar parameters.
General properties
Groups
StructureParameters
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A text string describing the structure definition. Maximum: 128 characters.
Possibility to use the Dictionary (to open press CTRL+L).
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Parameters
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Individual items (columns) of the structure are defined in the list, where each row of the list corresponds to one item of the structure and displays all configuration parameters.
To modify the number of items in the list use the following buttons:
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Device type
An object of Device definition type that specifies the device type (its structure and items). The device type cannot be changed - it is set when creating the device by specifying the appropriate Device definition as a Parent.
Array size
For devices with an Array Device Definition, it determines the number of array elements. The minimum value is 0.
For devices with a Structured Device Definition, this parameter is not used.
Warning!
If a device is used, it is possible to decrease the array length (number of rows), but it can cause references to the device rows that do not exist.
Example:
There is an object of Historical value type, that archives the device item on the 4th row. If the number of rows is decreased to 3, the given historical value has no value source. There is no warning about such a situation!!!
You can experience a similar problem when indexing in Event. In this case, it is advisable to use the \DIM attribute of the device variable valueDuring the editing of a used structure definition, it is not possible to decrease the number of columns.
To edit individual configuration parameters, press the left mouse button above the corresponding parameter. According to the type of parameter, a value is entered either by typing into the input field or by selecting from the list.
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A unique string of characters within the frame of objects, which meets restrictions for for object name in the system Name is used in references to an item.
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