Operators

You can use the following logical and mathematical operators in expressions:

Operator	Description
(	Left parenthesis
)	Right parenthesis
>	Greater than
<	Less than
>=	Greater than or equal to
<=	Less than or equal to
==	Equal to
!=	Not equal to
&&	Logical conjunction (And)
\|\|	Logical disjunction (Or) This operator is used to enter an 'or' condition. Example You use the expression editor to enter the formula `'TAG_TEMP'<57 \|\|'TAG_TEMP'>63` as the trigger condition. If the value of the selected tag TAG_TEMP lies below 57°C (134.6°F) or above 63°C (145.4°F), PCo creates a notification message and sends it to the destination system.
+	Plus
−	Minus
*	Multiply
/	Divide
%	Modulo operation
^	Power
&	Concatenation You can use this operator to add a text to the expression. This text is then attached to the value of the tag in the notification message. Example You have specified the following expression in the editor: `'Double1' & " degrees Celsius"` Double1 is the name of the tag. The text that is to be output must be put in quotation marks. `44 degrees Celsius`, for example, is then output in the notification message.
!	Logical negation (Not)