Product specifications

Alarm Analysis Configuration
144 3BDS011222-510 B
5. In the Subcondition field, enter a second description for identification, in this
case Property #1.
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. In this case we
choose priority level 1.
7. In the Message field, enter the message you want to have in the Alarm and
Event list, in this case “Alarm from the OPC server”.
8. Give an expression in the Expression field, in this example
OPC_Property_1==true.
9. Click Apply.
10. You now have an alarm expression that will indicate when the
OPC_Property_1 is true.
Expression Rules and Examples
As a basic rule, the expression shall follow the syntax rules given by the C
programming language.
When operands in an expression refer to aspect objects, make sure your syntax is
according to Item Syntaxes on page 147.
If you use a system defined delimiter as a part of a name, you have to type an escape
character “\” ahead of it.
For example, an aspect object that is named Objectgroup1.Object2 has to be quoted
with an escape character like this $’Objectgroup1\.Object2:value’ otherwise the
“.” character will be interpreted as an object delimiter.
If a symbolic string is used as a value in an Expression, you must use “ “ around it.
For example: objetc:level == “Down”.
If an aspect object name contains characters that could be misinterpreted as
operators or separators and so on. You must use quote $’ ’ around the name.
If you are using a division sign in the Expression area, it is required to have a
space before and after the sign. Otherwise it is misinterpreted.