NORD Drivesystems BU0550 - Manual (Page 32)

PLC logic for NORD SK 54xE frequency inverters
32 BU 0550 GB-0813
3.2.4.2 ANDN and ANDN(
Bit-wise AND linking of the AE/accumulator with a negated operand.
Bit-wise AND (...) linking of the AE/accumulator and the negated result of the bracket. Up to 6 bracket levels
are possible.
The values to be linked must belong to the same type of variable.
BOOL BYTE INT DINT
Possible data types X X X X
Commands Explanation
LD 2#0000_1111
ANDN 2#0011_1010 ANDN link between 2 constants
Accu = 2#0000_0101
LD 170 Link between a constant and 2 variables.
ANDN Var1, Var2 Accu = 170d ANDN Var1 ANDN Var2
LD Var1
ANDN ( Var2 AE/Accu = Var1 ANDN ( Var2 OR Var3 )
OR Var3
)
Table 29 ANDN and ANDN(
3.2.4.3 NOT
Bit-wise negation of the accumulator.
BOOL BYTE INT DINT
Possible data types X X X X
Commands Explanation
LD BYTE#10 Load the value 10
dec
into the accumulator in the
format Byte
NOT The value is resolved at Bit level (0000 1010),
negated bit-wise (1111 0101) and converted
back to a decimal value. Result = 245
dec
ST Var3 Save the result as Var3
Table 30 NOT
AE/Accu Operand Result
0 0 0
0 1 0
1 0 1
1 1 0