Rotate Left - Rol(27); Rotate Right - Ror(28) - Omron CQM1H - PROGRAM Programming Manual

Shift Instructions
5-17-5 ROTATE LEFT – ROL(27)
Limitations
Description
Precautions
Flags
5-17-6 ROTATE RIGHT – ROR(28)
Limitations
Description
264
CY: Receives the data of bit 00.
EQ: ON when the content of Wd is zero; otherwise OFF.
Ladder Symbols
ROL(27) @ROL(27)
Wd
DM 6144 to DM 6655 cannot be used for Wd.
When the execution condition is OFF, ROL(27) is not executed. When the exe-
cution condition is ON, ROL(27) shifts all Wd bits one bit to the left, shifting
CY into bit 00 of Wd and shifting bit 15 of Wd into CY.
CY
0
Use STC(41) to set the status of CY or CLC(41) to clear the status of CY
before doing a rotate operation to ensure that CY contains the proper status
before executing ROL(27).
CY will be shifted into bit 00 every cycle if the undifferentiated form of ROL(27)
is used. Use the differentiated form (@ROL(27)) or combine ROL(27) with
DIFU(13) or DIFD(14) to shift just one time.
ER: Indirectly addressed EM/DM word is non-existent.
(Content of *EM/*DM word is not BCD, or the EM/DM area boundary
has been exceeded.)
CY: Receives the data of bit 15.
EQ: ON when the content of Wd is zero; otherwise OFF.
Ladder Symbols
ROR(28) @ROR(28)
Wd
DM 6144 to DM 6655 cannot be used for Wd.
When the execution condition is OFF, ROR(28) is not executed. When the
execution condition is ON, ROR(28) shifts all Wd bits one bit to the right, shift-
ing CY into bit 15 of Wd and shifting bit 00 of Wd into CY.
CY
0
Wd
Bit
15
1 0 1 1 0 0 1 1 1 0 0 0 1 1 0 1
Wd
Bit
15
0 1 0 1 0 1 0 0 0 1 1 1 0 0 0 1
Section 5-17
Operand Data Areas
Wd: Rotate word
IR, SR, AR, DM, EM, HR, LR
Bit
00
Operand Data Areas
Wd: Rotate word
IR, SR, AR, DM, EM, HR, LR
Bit
00