NORD Drivesystems BU0550 - Manual (Page 35)

3 AWL (Instruction List, IL)
BU 0550 GB-0813 35
3.2.4.9 SHR
Bit-wise right shift of the accumulator. Here, the contents of the accumulator are shifted n times to the right.
The bits which are pushed out are lost.
BOOL BYTE INT DINT
Possible data types X X X
Commands Explanation
LD 175 Loads the value 1010_1111
SHR 2 The contents of the accumulator are shifted 2x to the
right
ST Value1 Saves the value 0010_1011 in Value1
Table 36 SHR
3.2.4.10 S and R
Setting and resetting of a boolean variable if the result of the previous link (the AE) was TRUE.
BOOL BYTE INT DINT
Possible data types X
Commands Explanation
LD TRUE Loads the AE with TRUE
S Var1 VAR1 is set as TRUE
R Var1 VAR1 is set as FALSE
Table 37 S and R
3.2.4.11 XOR and XOR(
Bit-wise "Exclusive OR" link between the AE/Accumulator and one or two variables or constants. The first
value is in the AE/Accumulator, the second is loaded with the command or is inside 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
XOR 2#0011_1010 XOR link between 2 constants
Accu = 2#0011_0101
LD 170 Link between a constant and 2 variables.
XOR Var1, Var2 Accu = 170d XOR Var1 XOR Var2
LD Var1
XOR ( Var2 AE/Accu = Var1 XOR ( Var2 OR Var3 )
OR Var3
)
Table 38 XOR or XOR(
AE/Accu Operand Result
0 0 0
0 1 1
1 0 1
1 1 0