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197
FX
3G
/FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
7 Basic Instruction
7.4 OR, ORI
1
Int
roduct
ion
2
O
ver
view
3
In
str
uc
tion
Li
st
4
D
evices
in D
etail
5
Spec
ified t
he
D
evice &
C
onst
ant
6
Bef
ore
Pr
ogr
am
m
ing
7
B
asic
In
st
ru
ct
io
n
8
FN
C
00-FN
C
09
P
rogr
am
F
low
9
FN
C
10
-FN
C
19
Mo
ve
&
Co
mp
are
10
FNC2
0-F
NC2
9
Ar
ith.
&
Logic
O
per
ation
7.4
OR, ORI
Outline
OR and ORI instructions are used to connect one contact in parallel.
If two or more contacts are connected in series, use ORB instruction described later to connect such a serial
circuit block to another circuit in parallel.
A step containing OR or ORI instruction is connected in parallel to a preceding step containing LD or LDI
instruction. There is no limitation in the number of times of parallel connection.
1. Instruction format
→
For the number of instruction steps, refer to Section 7.15.
2. Applicable devices
S
1: Special auxiliary relays (M) and 32-bit counters (C) cannot be indexed with index registers (V and Z).
S
2: State relays (S) cannot be indexed with index registers (V and Z).
S
3: "D
.b" is available only in FX
3U
and FX
3UC
PLCs. However, index modifiers (V and Z) are not available.
S
4: This function is supported only in FX
3U
/FX
3UC
PLCs.
Explanation of function and operation
1. OR instruction (parallel connection of NO (normally open) contacts)
Instruc-
tion
Bit Devices
Word Devices
Others
System User
Digit Specification
System User
Special
Unit
Index
Con-
stant
Real
Number
Charac-
ter String
Pointer
X Y M T C S D
.b KnX KnY KnM KnS T C D R U
\G
V Z Modify K H
E
"
"
P
OR
3 3
S
1
3
S
1
S
2
S
3
S
4
ORI
3 3
S
1
3
S
1
S
2
S
3
S
4
OR
OR
Basic Instruction
OR
−
Continuous
Operation
Pulse (Single)
Operation
Mnemonic
Operation Condition
ORI
OR Inverse
Basic Instruction
ORI
−
Continuous
Operation
Pulse (Single)
Operation
Mnemonic
Operation Condition
Timing chart
OR instruction
LD instruction
X000
Y000
X001
Circuit program
List program
LD
OR
OUT
0000
0001
0002
X000
X001
Y000
Y000
X001
X000
ON
ON
ON
ON
ON
ON
ON