Danfoss MCO 305, Design Manual, Page: 87 / 242

MCO 305 Design Guide
__ How to Program __
MG.33.L4.02 – VLT
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87
Inform yourself about the type of assignment operation which is structured in accordance with the Bit/Byte
commands and about the priorities of the operators and the operations.
NB!:
All arithmetical operations are integer number operations.
†
Operators
Symbol Meaning Syntax / Example Description
+ plus 3 + 3 = 6 Addition
– minus 9 – 3 = 6 Subtraction
* times 2 * 3 = 6 Multiplication
% divided by 19 % 3 = 6 Division (result is truncated)
^ XOR expr1 ^ expr2
127 ^ 255 = 128
Exclusive Or (binary operation)
mod Modulo expr1 mod expr2
250 mod 16 = 10 Mathematic modulo (rest of an integer division)
rnd Division expr1 rnd expr2
250 rnd 16 = 16
Division with round-off (opposite to truncating)
abs Absolute
amount
Abs(expr)
abs (-5) = 5
Absolute amount of the expression
†
Bit Operators
Symbol Meaning Syntax / Example Description Value range
& and 7 & 6 = 6 bit-by-bit relationship
_ or 2 | 4 = 6 bit-by-bit relationship
a
invert
a
(–7) = 6 bit-by-bit inversion
<< left shift 3 << 1 = 6 bit-by-bit shift to the left
>> right shift 12 >> 1 = 6 bit-by-bit shift to the right
. Bit expr1.expr2
7.1 = 1
7.3 = 1
7.4 = 0
Returns the Bit expr2 from expr1 1 - 32
.b Byte expr1.b expr2
0x027F.b1 = 127
0x027F.b2 = 2
Returns the Byte expr2 from expr1 1 - 4
.w Word expr1.w expr2
0x0010FFFF.w2 = 16 Returns the Word expr2 from expr1 1 - 2
.l Long expr1.l expr2 Returns the Long expr2 from expr1
(standard)