319
3. Instructions
CS/CJ/NSJ Series Instructions Reference Manual (W474)
Data Shift Instruction
3
ROL/ROLL
ROL/ROLL
Applicable Program Areas
Operands
z Operand Specifications
Flags
Instruction Mnemonic Variations
Function
code
Function
ROTATE LEFT ROL @ROL 027
Shifts all Wd bits one bit to the left
including the Carry Flag (CY).
DOUBLE ROTATE LEFT ROLL @ROLL 572
Shifts all Wd and Wd +1 bits one bit to
the left including the Carry Flag (CY).
Symbol
ROL ROLL
Area
Function block
definitions
Block program areas Step program areas Subroutines Interrupt tasks
SFC action or transition
programs
Usage OK OK OK OK OK OK
Operand Description
Data type Size
ROL ROLL ROL ROLL
Wd Word UINT UDINT 1 2
Area
Word addresses
Indirect DM/EM
addresses
Con-
stants
Registers Flags
Pulse
bits
TR
bits
CIO WR HR AR T C DM EM
@DM
@EM
*DM
*EM
DR IR
Indirect
using IR
TK CF
ROL Wd
OK OK OK OK OK OK OK OK OK OK ---
OK
--- OK --- --- --- ---
ROLL Wd ---
Name Label Operation
Error Flag ER OFF
Equals Flag = • ON when the shift result is 0.
• OFF in all other cases.
Carry Flag CY • ON when 1 is shifted into the Carry Flag (CY).
• OFF in all other cases.
Negative Flag N • ON when the leftmost bit is 1 as a result of the shift.
• OFF in all other cases.
Wd: Word
ROL(027)
Wd
ROLL(572)
Wd
Wd: Word
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