Lenze PLC Designer PLC Designer (R2-x) - Manual (Page 55)

L-force | PLC Designer
What is What in PLC Designer
DMS 3.2 EN 02/2011 TD29 53
Below you find a table of the ST operators in the order of their binding strength:
Operation Symbol Binding strength
Put in parentheses (expression) Strongest binding
Function call Function name
(parameter list)
Exponentiation EXPT
Negate
Building of complements -
NOT
Multiply
Divide
Modulo
*
/
MOD
Add
Subtract +
-
Compare <,>,<=,>=
Equal to Not equal to = <>
Boolean AND AND
Boolean XOR XOR
Boolean OR OR Weakest binding
Instruction type Example
Assignment A:=B; CV := CV + 1; C:=SIN(X);
Calling a function block and
use of the FB output CMD_TMR(IN := %IX5, PT := 300);
A:=CMD_TMR.Q
RETURN RETURN;
IF D:=B*B;
IF D<0.0 THEN
C:=A;
ELSIF D=0.0 THEN
C:=B;
ELSE
C:=D;
END_IF;