The majority of data which is contained within the variable tag is represented as an element which includes the items "Value", "ValueTimestamp", "Quality", "QualityTimestamp" and "Timestamp". With the exception of "Quality" these items are absolutes of a single value. However the "Quality" item has several layers of information within it. These layers of information are covered by the following categories:
The primary layer identifies the General Quality Values.
|
Cicode Label Name |
Value |
Description |
|---|---|---|
|
QUAL_BAD |
0x00 |
Value is not useful for reasons indicated by the Substatus Bit Field. |
|
QUAL_UNCR |
0x01 |
The Quality of the value is uncertain for reasons indicated by the Substatus Bit Field. |
|
QUAL_GOOD |
0x03 |
The Quality of the value is Good. |
These can be accessed from a text object on a graphics page at runtime, or with the Cicode function
Within each of these quality values is a substatus layer, and a third extended substatus layer. These layers of information can also be accessed using the
Published June 2018