Tag Properties: History
Use the Tag Properties dialog to view the history for a selected tag. IWS disables this command if there are open trend worksheets. Before using this dialog, you should have already created the trend groups.
Note: History does not support string-type tags. See Recipes folder for information about storing string values.
Integer and Real Type History
From the Tag Properties dialog, enable history for integer and real-type tags as follows:
- History Enabled checkbox: Click (check) to enable storage of the selected tag value samples.
- Group Number field: Specify the group number to which this tag is associated.
- Log Dead Band field: Specify a value sample taken when the variation value is equal to, or greater than, the Log Dead Band.
Boolean Type History
From the Tag Properties dialog, enable history for Boolean-type tags as follows:
- History Enabled checkbox: Click (check) to enable storage of the selected tag value samples.
- Group Number field: Specify the group number to which this tag is associated.