The Filter List lets you build an alarm filter from two or more conditions. To start a Filter List, click the Filter List radio button. Start off selecting when the filters (When statement) will be used. There are four options:
The When statement works together with an If statement matching a filter with a value. The available filters are:
When a filter is selected, an Edit button is displayed. Click the Edit button to select a mathematical comparison to indicate the relationship between the filter and a value that you specify In the following example, the Channel filter has been selected.
Click the drop-down menu to select the type of comparison. This will vary according to the selected filter. The type of comparison may be:
| = |
Is equal to |
| != |
Is not equal to |
| < |
Is less than |
| <= |
Is less than or equal to |
| > |
Is greater than |
| >= |
Is greater than or equal to |
| LIKE |
Is similar to, matches some portion (Used for a partial match) |
| ILIKE |
Case insensitive partial match |
| IN |
Condition exists within the filter value (usually used when the filter combines two or more variables which must be compared in some way to create a trigger) |
There will be one or more other fields to determine a value. This will vary according to the selected filter. Click Save to save the comparison.
The following screen shot shows an example of a Filter List.
You can have up to 25 filters. Click the Add Another button to add additional filters.
You can remove a filter by clicking the X next to the filter.