Alarm

Alarm Types 

 InTouch classifies alarms into several general categories based on their characteristics. These categories are known as Class and Type. The Distributed Alarm System categorizes all alarms into five general Conditions: Discrete, Deviation, Rate-of-Change, Value, and SPC.

The table below summarizes the alarm condition for both systems:

Alarm Condition & Distributed Class & Distributed Type
Discrete                                       DSC                                         DSC
Deviation                                    Major DEV                                MAJDEV
Deviation                                    Minor DEV                                MINDEV
Rate-of-Change                          ROC                                          ROC
SPC                                           SPC                                           SPC
Value - LoLo                             VALUE                                       LOLO
Value - Low                               VALUE                                       LO
Value - High                               VALUE                                       HI
Value - HiHi                               VALUE                                       HIHI 

Alarm Groups

Each InTouch alarm is assigned to a logical Alarm Group. These groups areuser-definable and can be arranged into a hierarchy up to 32 levels deep. The groups provide a way of categorizing alarms based on an organization, plant layout, or any other metric. Alarm Groups are useful for filtering alarm
displays, Alarm Printers, and acknowledgment scripts.

Every tagname is associated with an Alarm Group. If you do not associate an Alarm Group name to a tagname, then by default InTouch automatically associates it with the root group, $System. Any Alarm Group may have both tagnames and other Alarm Group names associated with it. Alarm Groups are
organized into a hierarchical tree structure with the root group, $System, at the top of the tree. All defined Alarm Groups automatically become descendants of the root group.