Mathematical expressions in eval tags and events

Mathematic Mathematical expression determining the value of an object of Eval tag type may be, in dependence on the object configuration, evaluated either periodically or at the change of some operands (the parameter Evaluation method in the configuration of eval tags).

Mathematical expression used in the configuration of an object of Event type is evaluated immediately as soon as the event evaluation reaches the line containing the given expression.

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Each expression in D2000 System in addition to the values , specifies their time stamps timestamps "ValueTime".

The chapter Usage of brackets in expressions describes all possible types of brackets used in expressions and the chapter Conditional expression contains the rules for writing conditional expressions.

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