Bitwise Boolean instructions
524
Part III FP Instructions
F68_XNR
16-bit data exclusive NOR
·········
s1
15
010
12
0
11
110
8
1
7
101
4
1
3
100
0
1
·········
s2
15
000
12
0
11
000
8
0
7
111
4
1
3
111
0
1
·········
d
15
101
12
1
11
001
8
0
7
101
4
1
3
100
0
1
Bit position
start: ON
Bit position
Bit position
This instruction also exists as a P instruction (for FP2/2SH, FP3/5, FP10/10SH PLC types), which
is only executed at the rising edge of the EN trigger. Select [Insert P instruction] from the
"Instructions" pane if you require a P instruction. To facilitate reuse, the instruction then appears
under "Recently used" in the pop-up menu. Press <Ctrl>+<Shift>+<v> within the programming
area to open the list of recently used elements.
PLC types Availability of F68_XNR (see page 1326)
Variable Data type Function
s1, s2 16-bit area or 16-bit equivalent constant to be compared
d
ANY16
16-bit area for storing NOR operation result
The variables s1, s2 and d have to be of the same data type.
For Relay T/C Register Constant
s1, s2 WX WY WR WL SV EV DT LD FL dec. or hex.
d - WY WR WL SV EV DT LD FL -
Description
Executes exclusive NOR operation of each bit in 16-bit equivalent constant or 16-bit data specified
by s1 and s2 if the trigger EN is in the ON-state. The exclusive NOR operation result is stored in
the 16-bit area specified by d. When 16-bit equivalent constant is specified by s1 or s2, the
exclusive NOR operation is performed internally converting it to 16-bit binary expression. You can
use this instruction to review the number of identical bits in the two 16-bit data.
Data types
Operands
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