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FX3S/FX3G/FX3GC/FX3U/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
10 Arithmetic and Logical Operation (+, −, ×, ÷) – FNC 20 to FNC 29
10.9 FNC 28 – WXOR / Logical Exclusive OR
10.9 FNC 28 – WXOR / Logical Exclusive OR
Outline
This instruction executes the exclusive logical sum (XOR) operation of two numeric values.
1. Instruction format
2. Set data
3. Applicable devices
S1: This function is supported only in FX3G/FX3GC/FX3U/FX3UC PLCs.
S2: This function is supported only in FX3U/FX3UC PLCs.
Explanation of function and operation
1. 16-bit operation (WXOR and WXORP)
The exclusive logical sum (XOR) operation is executed to the contents of and in units of bit, and the
result is transferred to .
• While the command input is OFF, the data of the transfer destination does not change.
• While the command input is ON, the data of the transfer sources and do not change.
• When a constant (K) is specified in the transfer sources and , it is automatically converted into binary
format.
• The logical exclusive 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).
1: ON, 0: OFF
Operand type Description Data type
Data used for exclusive logical sum or word device number storing data 16- or 32-bit binary
Data used for exclusive logical sum or word device number storing data 16- or 32-bit binary
Word device number storing the exclusive logical sum result 16- or 32-bit binary
Oper-
and
Type
Bit Devices Word Devices Others
System User Digit Specification System User
Special
Unit
Index
Con-
stant
Real
Number
Charac-
ter String
Pointer
XYMTCSD.b KnX KnY KnM KnS T C D R U\G V Z Modify K H E ""P
S1 S2
S1 S2
S1 S2
WXOR (FNC 28) instruction
Logical operation
(unit: bit)
000
101
011
110
DXOR
DXORP
Mnemonic Operation Condition
W
P
FNC 28
XOR
D
16-bit Instruction
7 steps
WXOR
WXORP
Mnemonic Operation Condition
Continuous
Operation
Pulse (Single)
Operation
32-bit Instruction
13 steps
Continuous
Operation
Pulse (Single)
Operation
S
1
S
2
D
S
1
S
2
D
S
1
S
2
D
Command
input
FNC 28
WXOR
S1
S2
D
∀
→
S1
S2
D
D
S
1
S
2
S
1
S
2
S
1
S
2
D