Change the value limits of a tag
- Last UpdatedJul 16, 2024
- 1 minute read
Raw input data from an I/O Server is transformed to a range of values appropriate for an InTouch application. The values of a tag are clamped to a range bounded by minimum and maximum values specified by the Min Raw and Max Raw properties of the Tagname Dictionary.
Then, these raw values are converted to a range of engineering units set by the Min EU and Max EU options. You can use a set of dotfields to monitor and modify a tag’s raw value and engineering units ranges.
The following table lists the dotfields that monitor or change tag values while an application is running.
|
Dotfield |
Read/Write |
Shows |
|---|---|---|
|
.MinRaw |
Read-only |
The low clamp setting of a raw value received from an I/O Server. |
|
.MaxRaw |
Read-only |
The high clamp setting of a raw value received from an I/O Server. |
|
.MinEU |
Read-only |
The minimum value in engineering units assigned to the tag. |
|
.MaxEU |
Read-only |
The maximum value in engineering units assigned to the tag. |
|
.EngUnits |
Read/Write |
The text value assigned to an analog tag from the Eng Units option of the Tagname Dictionary. |
|
.RawValue |
Read-only |
The actual discrete or analog value received by the tag from an I/O Server before scaling is applied. |
|
.Value |
Read/Write |
The current value of a tag. |
|
.OnMsg |
Read/Write |
The message assigned to a discrete tag when its value evaluates to True, On, or 1. |
|
.OffMsg |
Read/Write |
The message assigned to a discrete tag when its value evaluates to False, Off, or 0. |
|
.Comment |
Read/Write |
The tag comment specified from the Tagname Dictionary. |