Omron SYSMAC CJ - REFERENCE MANUAL 08-2008

563
Logic Instructions Section 3-13
Description COM(029) reverses the status of every specified bit in Wd.
Wd
→Wd: 1 → 0 and 0 → 1
Note When using the COM instruction, be aware that the status of each bit will
change each cycle in which the execution condition is ON.
Flags
Precautions When COM(029) is executed, the Error Flag will turn OFF.
If as a result of COM, the content of R is 0000 hex, the Equals Flag will turn
ON.
If as a result of COM, the leftmost bit of R is 1, the Negative Flag will turn ON.
Examples When CIO 000000 is ON in the following example, the status of each bit will
be D00100 is reversed.
EM Area without bank E00000 to E32767
EM Area with bank En_00000 to En_32767
(n = 0 to C)
Indirect DM/EM
addresses in binary
@ D00000 to @ D32767
@ E00000 to @ E32767
@ En_00000 to @ En_32767
(n = 0 to C)
Indirect DM/EM
addresses in BCD
*D00000 to *D32767
*E00000 to *E32767
*En_00000 to *En_32767
(n = 0 to C)
Constants ---
Data Registers DR0 to DR15
Index Registers ---
Indirect addressing
using Index Registers
,IR0 to ,IR15
–2048 to +2047 ,IR0 to –2048 to +2047 ,IR15
DR0 to DR15, IR0 to IR15
,IR0+(++) to ,IR15+(++)
,–(– –)IR0 to, –(– –)IR15
Area Wd
Name Label Operation
Error Flag ER OFF
Equals Flag = ON when the result is 0.
OFF in all other cases.
Negative Flag N ON when the leftmost bit of R is 1.
OFF in all other cases.