Edit storage rule information for an I/O server

When you set storage rules for a particular I/O Server, the rules apply to all tag values originating from that I/O Server.

To edit storage rules

1. In the Operations Control Management Console tree, expand a server group and then expand a server.

2. In the Configuration Editor, expand System Configuration, and then expand Data Acquisition.

3. Expand the IDAS associated with the I/O Server.

4. Right-click the name of the I/O Server to edit, and then click Properties. The Properties dialog box appears.

   

5. Click the Set Storage Rules tab.

6. To redirect the I/O Server to InTouch HMI software, click Redirect to InTouch. This button is only available if at least one I/O Server type is "VIEW." The Select InTouch Node dialog box appears.

   

   In the Computer name of InTouch system list, select the name of the InTouch node from which you want to acquire tag values. If more than one InTouch nodes are imported, be sure to select the InTouch node that receives data from the I/O Server you are redirecting.

   For more information, see Redirect I/O servers to intouch HMI software.

   Important: After you redirect an I/O Server, you cannot undo.

   Click OK to redirect the I/O Server.

7. In the Storage Type group, configure the storage rule for all the tags associated with the I/O Server:

   Unchanged

   No storage rule is applied at the I/O Server level.

   Delta

   Tag values are stored only if they have changed.

   Cyclic

   Tag values are stored according to a fixed rate, which you can select from the Storage Rate list.

   None

   Tag values from this I/O Server are not stored into history.

   Forced

   All values received from this I/O Server are stored.

8. In the Deadband group, configure the deadband. Options in this group are only available if delta storage is selected in the Storage Type group. For the deadband type you select, configure the appropriate options.

   Unchanged

   No storage rule is applied at the I/O Server level.

   Time and/or Value

   A time deadband is the minimum time, in milliseconds, between stored values for a single tag. Any value changes that occur within the time deadband are not stored. The time deadband applies to delta storage only. A time deadband of 0 indicates that the system will store the value of the tag each time it changes.

   A value deadband is the percentage of the difference between the minimum and maximum engineering units for the tag. Any data values that change less than the specified deadband are not stored. The value deadband applies to delta storage only. A value of 0 indicates that a value deadband will not be applied.

   Swinging Door

   A swinging door deadband is the percentage of deviation in the full-scale value range for an analog tag. The swinging door (rate) deadband applies to delta storage only. Time and/or value deadbands can be used in addition to the swinging door deadband. Any value greater than 0 can be used for the deadband. A value of 0 indicates that a swinging door deadband will not be applied.

9. In the Set Acquisition box, select whether or not to turn data acquisition from the I/O Server either on or off. The Unchanged option allows you to leave current acquisition settings unchanged, which is useful if you have a mix of acquired and not acquired tags on the I/O Server and do not want to go through all of them.

10. Click OK.