Product specifications

Alarm Analysis Configuration
142 3BDS011222-510 B
Expression Examples
The expression can be more or less complicated, below are some examples:
Example 1 - Boiler Temperature. Say, for example, that you have a boiler and you
want to have an indication when the temperature goes above 80 and one indication
when above 90 degrees centigrade. You do this as follows:
1. Add an Alarm Expression aspect to a propriety Aspect Object.
2. Select Condition Alarm in the Message Type area.
3. Select Process Alarms for SoftAlarms in the Category drop-down menu.
4. In the Condition field, enter a name to identify the expression, in this case
“High Level“.
5. In the Subcondition field, enter a second description for identification, in this
case “Level above 80“.
6. Select a priority level. The value will give the color of the alarm list line
according to the setting in the Alarm and Event list definition. For the
temperature of 80 degrees we choose priority 2.
7. In the Message field, enter the message you want to have in the Alarm and
Event list, in this case “+High Level”.
8. In the Inactive Message field, enter the message you want to have when the
alarm is inactive, in this case “-High Level”.
9. Give an expression in the Expression field, in this example Value > 80.
10. Click Apply.
11. To create another limit for above 90 degrees, enter in the Condition field a
name to identify the expression, in this case “Very High Level“.
12. In the Subcondition field, enter a second description for identification, in this
case “Level above 90“.
13. Select a priority level. The value will give the color of the alarm list line
according to the setting in the Alarm and Event list definition. For the
temperature of 90 degrees we choose priority 1.