Enable alarms

Check this property if you want to use alarms for this tag.

HiHi, Hi, Lo, LoLo, Normal

Check HiHi, Hi, Lo, LoLo or Normal if you want to use the correspondent alarm(event).

Limit

Write this property for the correspondent alarm(event). If the value of the tag plus Deadband will be more than HiHi or Hi limit the correspondent alarm will be called and be written into Events database. If the value of the tag minus Deadband will be less than LoLo or Lo limit the correspondent alarm will be raised and be written into Events database.

Priority

Enter this property for the correspondent alarm(event). If the priority of the alarm(event) is less than value of Notifications(Priority<) you set in the project properties the notification dialog will be called.

Message

Enter this property for the correspondent alarm(event). In the message you can use indirect values {group}, {subgroup}, {name} and {description}. Also you can use keyword {value} for displaying current value.

Deadband

Hysteresis to avoid triggering an alarms when the tag value fluctuates slightly.

Enable OPC UA event

Check this property if you bind this tag to the OPC UA server tag(node) and you want to use EventNotifier of this tag(node).