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Data Shift Instructions Section 3-9
Precautions When ASRL (571) is executed, the Error Flag and the Negative Flag will turn
OFF.
If as a result of the shift the contents of Wd and Wd +1 are zero, the Equals
Flag will turn ON.
Examples When CIO 000000 is ON, word CIO 0100 and CIO 0101 will shift one bit to
the right. “0” will be placed into CIO 010115 and the contents of CIO 010000
will be shifted to the Carry Flag (CY).
3-9-9 ROTATE LEFT: ROL(027)
Purpose Shifts all Wd bits one bit to the left including the Carry Flag (CY).
Ladder Symbol
Variations
Applicable Program Areas
Operand Specifications
Carry Flag CY ON when 1 is shifted into the Carry Flag (CY).
OFF in all other cases.
Negative Flag N OFF
Name Label Operation
Wd
ROL(027)
Wd: Word
Wd
Variations Executed Each Cycle for ON Condition ROL(027)
Executed Once for Upward Differentiation @ROL(027)
Executed Once for Downward Differentiation Not supported
Immediate Refreshing Specification Not supported
Block program areas Step program areas Subroutines Interrupt tasks
OK OK OK OK
Area Wd
CIO Area CIO 0000 to CIO 6143
Work Area W000 to W511
Holding Bit Area H000 to H511
Auxiliary Bit Area A448 to A959
Timer Area T0000 to T4095
Counter Area C0000 to C4095
DM Area D00000 to D32767
EM Area without bank E00000 to E32767
EM Area with bank En_00000 to En_32767
(n = 0 to C)
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