NORD Drivesystems BU0550 - Manual (Page 34)

PLC logic for NORD SK 54xE frequency inverters
34 BU 0550 GB-0813
3.2.4.6 ROL
Bit-wise left rotation of the accumulator. Here, the content of the accumulator is shifted n times to the left,
whereby the left Bit is reinserted on the right.
BOOL BYTE INT DINT
Possible data types X X X
Commands Explanation
LD 175 Loads the value 1010_1111
ROL 2 The contents of the accumulator are rotated 2x to the
left
ST Value1 Saves the value 1011_1110 in Value1
Table 33 ROL
3.2.4.7 ROR
Bit-wise right rotation of the accumulator. Here, the content of the accumulator is shifted n times to the right,
whereby the left Bit is reinserted on the left.
BOOL BYTE INT DINT
Possible data types X X X
Commands Explanation
LD 175 Loads the value 1010_1111
ROR 2 The contents of the accumulator are rotated 2x to the
right
ST Value1 Saves the value 1110_1011 in Value1
Table 34 ROR
3.2.4.8 SHL
Bit-wise left shift of the accumulator. Here, the contents of the accumulator are shifted n times to the left.
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
SHL 2 The contents of the accumulator are shifted 2x to the
left
ST Value1 Saves the value 1011_1100 in Value1
Table 35 SHL