ABB ST语言编程(7)

System 800xA Training

13.3.4Precedence

The priority of operators decides the order of evaluation of an expression. Below is asummary of available operators, in descending priority:Operator

(…)

Function (…)

Not,-

value (0 becomes 1, 1 becomes 0) and arithmetical

negation (-).

**

*, / ,mod

+,-

<, >, <=, >=

=, <>

and, &

xor

oring to a power.enthesized expression.

If you are unsure of the evaluation order then use parenthesis to force evaluation ofsub-expressions.

Chapter13-7