Lenze PLC Designer PLC Designer (R2-x) Manual de usuario descargar pdf (Pagina 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;

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