PLC Programming

What is What in CoDeSys
Operation Symbol Binding strength
Put in parentheses (expression) Strongest binding
Function call
Exponentiation
Negate
Building of complements
Multiply
Divide
Modulo
Add
Subtract
Function name
(parameter list)
EXPT
-
NOT
*
/
MOD
+
-
Compare ,=
Equal to
Not equal to
Boolean AND
Boolean XOR
=
AND
XOR
Boolean OR OR Weakest binding
There are the following instructions in ST, arranged in a table together with example:
Instruction type
Assignment
Example
A:=B; CV := CV + 1; C:=SIN(X);
Calling a function block
and
use of the FB output
RETURN
CMD_TMR(IN := %IX5, PT := 300);
A:=CMD_TMR.Q
RETURN;
IF
D:=B*B;
IF D