11 operator list, 1 dds-integrated iec operators, Drive plc developer studio – Lenze DDS v2.3 User Manual
Page 267
Drive PLC Developer Studio
IEC 61131-3 Operators
11-1
l
DDS EN 2.3
11
Operator list
The table below lists the operators in ST and IL with the modifiers available in IL.
Column Operator IL displays only the line, using the operator.
Prerequisite:
The first required operator must have been loaded in the preceding line (e. g. LD in)
Column Mod.IL lists the modifiers available in IL.
C
The instruction will be carried out only if the result of the preceding expression is TRUE.
N
For JMPC, CALC, RETC The instruction will be carried out only if the result of the preceding expression is FALSE.
N
Otherwise Negation of the operand (not of the accumulator).
(
Parentheses frame operator; the operation in front will be executed only after the right parenthesis has been reached.
11.1
DDS-integrated IEC operators
Operator ST
Operator IL
Mod.IL
Meaning
’
String frame (e.g. ’string1’)
..
[ ]
Array: Representation of the array range (e.g. ARRAY[0..3] OF
INT)
:
Separator between operand and type in the declaration (e.g.
var1 : INT;)
;
Closing instruction (e.g. a:=var1;)
^
Dereference pointer (e.g. pointer1^)
LD var1
N
Load value of var1 into the accumulator
:=
ST var1
N
Save current result at operand position var1
S boolvar
Set Boolean operand boolvar to TRUE exactly if the current
result is TRUE
R boolvar
Set Boolean operand to FALSE exactly if the current result is
TRUE
JMP label
CN
Jump to label
<Program name>
CAL prog1
CN
Call program prog1
<Instance name>
CAL inst1
CN
Call function block instance inst1
<Fktname>(vx, vy,..)
<Fktname> vx, vy
CN
Call function and transfer variables vx, vy
RETURN
RET
CN
Exit organization unit and, if necessary, return to calling unit.
(
Value following the parenthesis is taken as the operand, the
preceding operation is put on hold until the right parenthesis is
reached
)
Evaluate operation on hold
AND
AND
N,(
Bit-by-bit AND
OR
OR
N,(
Bit-by-bit OR
XOR
XOR
N,(
Bit-by-bit exclusive OR
NOT
NOT
Bit-by-bit NOT
+
ADD
(
Addition
-
SUB
(
Subtraction
*
MUL
(
Multiplication
/
DIV
(
Division
>
GT
(
Greater than
>=
GE
(
Greater than/equal to
=
EQ
(
Equal to
<>
NE
(
Not equal to
<=
LE
(
Less than/equal to
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