Or, Ori - Mitsubishi Electric MELSEC FX3U Programming Manual

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
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
OR
OR
ORI
OR Inverse
2. Applicable devices
Bit Devices
Instruc-
System User
tion
X Y M T C S D .b KnX KnY KnM KnS T C D R U \G
OR
1
ORI
1
1: Special auxiliary relays (M) and 32-bit counters (C) cannot be indexed with index registers (V and Z).
2: State relays (S) cannot be indexed with index registers (V and Z).
3: "D .b" is available only in FX
4: This function is supported only in FX
Explanation of function and operation
1. OR instruction (parallel connection of NO (normally open) contacts)
Circuit program
X000
X001
Timing chart
LD instruction
OR instruction
Mnemonic
Basic Instruction
OR
−
Mnemonic
Basic Instruction
ORI
−
→ For the number of instruction steps, refer to Section 7.15.
Digit Specification
3
1 2
3
1 2
and FX
3U 3UC
/FX
3U
List program
0000
0001
Y000
0002
ON
X000
ON ON
X001
ON ON
Y000
Operation Condition
Continuous
Operation
Pulse (Single)
Operation
Operation Condition
Continuous
Operation
Pulse (Single)
Operation
Word Devices
Special
System User Index
Unit
V Z Modify K H
PLCs. However, index modifiers (V and Z) are not available.
PLCs.
3UC
LD X000
OR X001
OUT Y000
ON
ON
7 Basic Instruction
7.4 OR, ORI
Others
Con- Real Charac-
Pointer
stant Number ter String
E " "
4
4
197
1
2
3
4
5
P
6
7
8
9
10