Omron CPM1 - PROGRAMING MANUAL 02-2001 Programming Manual page 424

Shift Instructions
Description
Precautions
Flags
7-16-4 ARITHMETIC SHIFT RIGHT – ASR(26)
Limitations
Description
Precautions
Flags
7-16-5 ROTATE LEFT – ROL(27)
Limitations
406
When the execution condition is OFF, ASL(25) is not executed. When the execu-
tion condition is ON, ASL(25) shifts a 0 into bit 00 of Wd, shifts the bits of Wd one
bit to the left, and shifts the status of bit 15 into CY.
Bit
CY
15
1 0 0 1 1 1 0 0 0 1 0 1 0 0 1 1
A 0 will be shifted into bit 00 every cycle if the undifferentiated form of ASL(25) is
used. Use the differentiated form (@ASL(25)) or combine ASL(25) with
DIFU(13) or DIFD(14) to shift just one time.
Indirectly addressed DM word is non-existent. (Content of *DM word is
ER:
not BCD, or the DM area boundary has been exceeded.)
CY: Receives the status of bit 15.
EQ: ON when the content of Wd is zero; otherwise OFF.
Ladder Symbols
ASR(26) @ASR(26)
Wd
DM 6144 to DM 6655 cannot be used for Wd.
When the execution condition is OFF, ASR(25) is not executed. When the
execution condition is ON, ASR(25) shifts a 0 into bit 15 of Wd, shifts the bits of
Wd one bit to the right, and shifts the status of bit 00 into CY.
Bit
15
1 1 0 0 1 0 1 1 0 0 1 1 0 0 1 0
0
A 0 will be shifted into bit 15 every cycle if the undifferentiated form of ASR(26) is
used. Use the differentiated form (@ASR(26)) or combine ASR(26) with
DIFU(13) or DIFD(14) to shift just one time.
Indirectly addressed DM word is non-existent. (Content of *DM word is
ER:
not BCD, or the DM area boundary has been exceeded.)
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.
Wd
Wd
Section 7-16
Bit
00
0
Operand Data Areas
Wd: Shift word
IR, SR, AR, DM, HR, LR
Bit
CY
00
Operand Data Areas
Wd: Rotate word
IR, SR, AR, DM, HR, LR