Alarms

You can create InTouch applications that generate alarms and events to notify operators about the status of process activity.

• Alarms warn run-time operators about process conditions that could potentially cause problems. Typically, you set up an alarm to trigger when a process value exceeds a defined limit. An operator must usually acknowledge the alarm.

• Events represent normal system status messages. A typical event is when a system condition occurs, such as an operator logging on to an InTouch application. Operators do not have to acknowledge events.

The following figure shows how the InTouch HMI handles alarms and events while an application is running. Alarm and event data is saved to the alarm database.

You can configure any tag for event monitoring. An event message is logged to the alarm system each time the tag value changes. The event message includes how the value changed and whether the operator, I/O, scripts, or the system initiated the change.