Mitsubishi Electric MELSEC FX3U Programming Manual page 305

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
2. 32-bit operation (DXOR and DXORP)
The exclusive logical sum (XOR) operation is executed to the contents of [
] in units of bit, and the result is transferred to [
S
2
Command
input
FNC 28
DXOR
• While the command input is OFF, the data of the transfer destination [
• While the command input is ON, the data of the transfer source [
change.
• When a constant (K) is specified in the transfer source [
automatically converted into the binary format.
• The exclusive logical sum operation is executed in units of bit as shown in the table below (1 ∀ 1 = 0,
0 ∀ 0 = 0, 1 ∀ 0 = 1, 0 ∀ 1 = 1).
Logical operation
(unit: bit)
Program example
By combining WXOR and CML (FNC 14) instructions, the exclusive logical sum not (XORNOT) operation can
be executed.
X000
FNC 28
WXOR
FNC 14
CML
S1 S2 D
S +1, S
1 1
0
1
0
1
D 10 D 12 D 14
D 14 D 14
10 Arithmetic and Logical Operation (+, −, ×, ÷) – FNC 20 to FNC 29
10.9 FNC 28 – WXOR / Logical Exclusive OR
+1, ].
D D
S S ∀ S S
1 +1, 1 2 +1,
D
+1,
S
1
+1, ] [
S S
1 1
S +1, S
2 2
0
0
1
1
+1, ] and [
S S S
1 1 2
→ D D
2 +1,
+1, ] does not change.
D
] [ +1, ] do not
S S S
1 2 2
+1, ], it is
S S
2 2
1: ON, 0: OFF
+1,
D D
DXOR (FNC 28) instruction
0
1
1
0
303
1
+1,
2
3
4
5
6
7
8
9
10