Mitsubishi Electric MELSEC FX3U - Page 303

301
FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
10 Arithmetic and Logical Operation ( + , − , × , ÷ ) – FNC 20 to FNC 29
10.8 FNC 27 – WOR / Logical Word OR
1
Introduction
2
Overview
3
Instruction List
4
Devices in Detail
5
Specified the Device & Constant
6
Before Programming
7
Basic Instruction
8
FNC00-FNC09 Program Flow
9
FNC10-FNC19 Move & Compare
10
FNC20-FNC29 Arith. & Logic Operation
2. 32-bit operation (DOR and DORP)
The logical sum (OR) operation is executed to the contents of [ +1, ] and [ +1, ] in units
of bit, and the result is transferred to [ +1, ].
• While the command input is OFF, the data of the transfer destination [ +1, ] does not change.
• While the command input is ON, the data of the transfer source [ +1, ] [ +1, ] do not
change.
• When a constant (K) is specified in the transfer source [ +1, ] [ +1, ], it is
automatically converted into the binary format.
• The logical sum operation is executed in units of bit as shown in the table below (1 ∨ 1 = 1, 0 ∨ 1 = 1,
0 ∨ 0 = 0, 1 ∨ 0 = 1).
1: ON, 0: OFF
+1, +1,
+1,
DOR (FNC 27) instruction
Logical operation
(unit: bit)
000
101
011
111
S 1 S 1 S 2 S 2
D D
Command
input
FNC 27
DOR
S 1  S 2 
D 
+1, ∨ +1, → +1,
S 1  S 2  D  S 1  S 2  D 
D D
S 1 S 1 S 2 S 2
S 1 S 1 S 2 S 2
S 1 S 1 S 2 S 2
D D