12 operators and library modules overview, L-force | plc designer – Lenze PLC Designer PLC Designer (R2-x) User Manual
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L-force | PLC Designer
Operators and Library Modules Overview
DMS 3.2 EN 02/2011 TD29
531
12
Operators and Library Modules Overview
The table shown below shows an overview on the operators, which are available in
»PLC Designer« resp. in the libraries Standard.lib and Util.lib. You find there the
notation for ST and IL. For IL also the supported modificators are listed.
Take note that for the 'IL operator' column: Only the line in which the operator is used
will be displayed. A prerequisite is that the (first) required operand have been
successfully loaded in the preceding line (e.g. LD in).
The 'Mod. IL' column shows the possible modifiers in IL:
C
The command is only executed if the result of the preceding expression is TRUE.
N
for JMPC, CALC, RETC: The command is only executed if the result of the preceding expression
is FALSE.
N
otherwise: negation of the operand (not of the accumulator)
(
Operator enclosed in brackets: only after the closing bracket is reached will the operation
preceding the brackets be carried out.
Please obtain a detailed description of usage from the appropriate Appendices
concerning IEC operators integrated into »PLC Designer« resp. the libraries.
Operators in »PLC Designer«:
in ST
in AWL
Mod.
AWL
Description
'
String delimiters (e.g. 'string1')
..
[ ]
Size of Array range (e.g. ARRAY[0..3] OF
INT)
:
Delimiter between Operand and Type in a
declaration (e.g. var1 : INT;)
;
Termination of instruction (e.g. a:=var1;)
^
Dereferenced Pointer (e.g. pointer1^)
LD var1
N
Load value of var1 in buffer
:=
ST var1
N
Store actual result to var1
S boolvar
Set boolean operand boolvar exactly then
to TRUE, when the actual result is TRUE
R boolvar
Set boolean operand boolvar exactly then
to FALSE, when the actual result is TRUE
JMP label
CN Jump to label
CAL prog1
CN Call program prog1
CAL inst1
CN Call function block instance inst1
CN Call function fctname and transmit
variables vx, vy
RETURN
RET
CN Leave POU and go back to caller