SetLineCompression is a method for a Trend Invoke method action.
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Purpose: SetLineCompression |
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Advanced Configuration: SetLineCompression |
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Historian compression line additional values. |
Purpose: SetLineCompression
To set the compression specifications for a particular Line ID.
Advanced Configuration: SetLineCompression
Click Advanced on the Action tab of the Procedure Information dialog box.
The Edit Method dialog box opens for the SetLineCompression method
Configuration is as follows.
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Description |
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Method name |
Name of the selected method. Note: Another method can be selected from the drop-down list. |
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Method result |
(Optional) Setpoint that contains the status value. |
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Boolean |
Boolean |
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Structure Type |
BOOL |
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Allowed |
Device or global Point ID. |
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Parameters |
LineID |
String that identifies the line ID whose display parameters you want to change. |
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Type |
Expression or point ID that evaluates to one of the following numeric values: |
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Value |
Trending will plot the: |
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0 |
Not do any compression. |
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1 |
Average of the values in the group. |
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2 |
First data point in the group. |
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3 |
Last data point in the group. |
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4 |
Data point from the group with the minimum value. |
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5 |
Plot the data point from the group with the maximum value. If you are using compression, Trending automatically determines the group size. |
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6 |
Average of the values in the group, using server side compression. |
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7 |
First data point in the group, using server side compression. |
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8 |
Last data point in the group, using server side compression. |
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9 |
Data point from the group with the minimum value, using server side compression. |
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10 |
Data point from the group with the maximum value, using server side compression. |
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The following values are available only for Historian lines. |
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Lab value |
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Average value |
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Trend |
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Interpolated |
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Raw standard deviation |
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Standard deviation |
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Count |
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Total |
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Raw total value |
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Resolution |
Number of time units that should be used for each group of data. (For Historian lines only) the Resolution value does the following. |
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0 |
The Default Sampling Interval will be enabled for that line. |
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>0 |
(Greater than 0) Trending checks to see if the Default Sample Interval is enabled for the line; if the Default Sample Interval is enabled, Trending:
This enables Sample Interval.
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Units |
Unit of time to be used. |
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Enter |
For |
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0 |
Seconds |
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1 |
Minutes |
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2 |
Hours |
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Option 5.2.3. Retrieval mode and sample interval for Historian lines. |
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List of line display methods. |
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All Trend methods. |
Disables the Default Sample
Interval.