Mitsubishi Electric MELSEC FX3U - Page 201

199
FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
7 Basic Instruction
7.4 OR, ORI
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
5. Bit specification of data register (D)
*1
A bit in data register (D) can be specified as a device used in OR and ORI instructions.
When specifying a bit in data register, input "."
after a data register (D) number, and then
input a bit number (0 to F) consecutively.
Only 16-bit data registers are available.
Specify a bit number as "0, 1, 2, ... 9, A, B, ...
F" from the least significant bit.
Example:In the example shown on the left,
OR contact is set to ON (becomes
conductive) or OFF (becomes non-
conductive) by the bit 3 of D0.
*1. This function is supported only in FX
3U /FX3UC PLCs.
Errors
• When an I/O number used in OR or ORI instruction does not exist due to indexing, M8316 (Non-existing I/
O specification error) turns ON.
• When the device number of a device (M, T or C) other than I/O used in OR or ORI instruction does not
exist due to indexing, an operation error (error code: 6706) occurs.
Circuit program List program
LD
OR
OUT
0000
0001
0004
X000
D0.3
Y000
Y000
D0.3
X000