Lenze DDS v2.3 - Manual (Page 271)

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IEC 61131-3 Operators
12-1
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DDS EN 2.3
12 IEC 61131-3 operators
The DDS supports all IEC operators.
Contrary to standard functions, they are known implicitly throughout the entire project. Organization
unit implementations use operators like functions.
12.1 Arithmetic operators
Types:
The operands of the following arithmetic operators can be of type BYTE, WORD, DWORD, SINT, USINT,
INT
, UINT, DINT, UDINT and REAL.
12.1.1 ADD
Addition
It is also possible to add two TIME variables, the sum being again a time
(e.g. t#45s + t#50s = t#1m35s).
Examples
IL
ST FBD
LD 7
ADD 2,4,7
ST
Var1
Var1 := 7+2+4+7;
12.1.2 MUL
Multiplication
Examples
IL
ST FBD
LD 7
MUL 2,4,7
ST
Var1
Var1 := 7*2*4*7;
12.1.3 SUB
Subtraction
A TIME variable can also be subtracted from another TIME variable, the result being again of type
TIME
. Note that negative TIME values are not defined.
Examples
IL
ST FBD
LD 7
SUB 2
ST
Var1
Var1 := 7-2;
12.1.4 DIV
Division
Examples
IL
ST FBD
LD 8
DIV 2
ST
Var1
Var1 := 8/2;
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