Decision Blocks provide users with a method of branching notifications based off of a simple question. If it meets the requirements, the logic will branch to the right, if it does not, it will branch to the left. A combination of questions and methods can be utilized in a single Tactic to reach the desired goal.
This article will delve into a potential scenario where you can utilize the Severity Decision Block in a Tactic and Strategy with minimal configuration.
Severity Decision Block
The Severity Decision Block will branch based off of the SCADA defined Severity (OPC is WIN-911 defined). If the alarm is above the Blocks defined Severity, the logic will branch right, if it is equal to, or less than the defined Severity, the logic will branch left.
A manger says he wants any critical alarm above a 900 severity to notify everyone, every other alarm just needs to go to Maintenance.
The above Tactic will ask if the alarm is above a 900 severity, so anything with 901 or greater will notify every single connection available in WIN-911, 900 or less will only go to Maintenance. When setting up the Strategy, the Initial Event will trigger the Severity Block Tactic. In this example, the rest of the Strategy is user-defined, but for this particular user, they wanted to re-notify when the alarm is acknowledged, and stop the Strategy when the alarm goes terminal.
In the case that a user wants to setup a range of severity, best practice would be to nest two Severity Blocks. If a user wants a range of 901-950 to notify everyone, but anything 900 and lower go to Maintenance.
The above Tactic will accomplish just that. Since the Block only branches based on being above a Severity, the first block will branch will ask if it is above, and the since we want the range, we will place the notification block on the left, in the event that it is below the defined Severity.
Remember that this example can be applied to a number of different scenarios over different Blocks. If you are experiencing a problem, or have additional questions, please submit Support Ticket or contact Product Support at 512-326-1011 x3 or toll free in the US and Canada at 1-800-331-8740 x3