Double Exclusive Nor: Xnrl(613) - Omron SYSMAC CJ - REFERENCE MANUAL 08-2008 Reference Manual

Logic Instructions
Description
Flags
Precautions

3-13-8 DOUBLE EXCLUSIVE NOR: XNRL(613)

Purpose
Ladder Symbol
Variations
Applicable Program Areas
560
XNRW(037) takes the logical exclusive NOR of data specified in I
outputs the result to R.
• The logical exclusive NOR is taken of corresponding bits in I
succession.
• When the content of corresponding bits of I
be output to the corresponding bit of R and when they are different, 1 will
be output to the corresponding bit in R.
I I + I I R
1, 2 1, 2
I I
1
1
1
0
0
Name Label
Error Flag ER
Equals Flag =
Negative Flag N
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.
Takes the logical exclusive NOR of corresponding bits in double words of
word data and/or constants.
XNRL(613)
I
I
1
I
I
2
R: Result word
R
Variations Executed Each Cycle for ON Condition
Executed Once for Upward Differentiation
Executed Once for Downward Differentiation Not supported.
Immediate Refreshing Specification
Block program areas
OK OK
R
2
1 1
0 0
1 0
0 1
Operation
OFF
ON when the result is 0.
OFF in all other cases.
ON when the leftmost bit of R is 1.
OFF in all other cases.
: Input 1
1
: Input 2
2
Step program areas Subroutines
OK
Section 3-13
and I
1 2
and I
1
and I are different, a 0 will
1 2
XNRL(613)
@XNRL(613)
Not supported.
Interrupt tasks
OK
and
in
2