Omron SYSMAC CJ - REFERENCE MANUAL 08-2008

560
Logic Instructions Section 3-13
Description XNRW(037) takes the logical exclusive NOR of data specified in I
1
and I
2
and
outputs the result to R.
• The logical exclusive NOR is taken of corresponding bits in I
1
and I
2
in
succession.
• When the content of corresponding bits of I
1
and I
2
are different, a 0 will
be output to the corresponding bit of R and when they are different, 1 will
be output to the corresponding bit in R.
I
1,
I
2
+ I
1,
I
2
→ R
Flags
Precautions When XNRW(037) is executed, the Error Flag will turn OFF.
If as a result of the NOR, the content of R is 0000 hex, the Equals Flag will
turn ON.
If as a result of the NOR, the leftmost bit of R is 1, the Negative Flag will turn
ON.
3-13-8 DOUBLE EXCLUSIVE NOR: XNRL(613)
Purpose Takes the logical exclusive NOR of corresponding bits in double words of
word data and/or constants.
Ladder Symbol
Variations
Applicable Program Areas
I
1
I
2
R
111
100
010
001
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.
XNRL(613)
I
1
I
2
R
I
1
: Input 1
I
2
: Input 2
R: Result word
Variations Executed Each Cycle for ON Condition XNRL(613)
Executed Once for Upward Differentiation @XNRL(613)
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