Mitsubishi FX3G Series Programming Manual

33
FX3G/FX3U/FX3GC/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
2 Overview (Sequence Program)
2.6 Program Memory and Devices
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
2.6 Program Memory and Devices
2.6.1 Memory structure
1. In FX3U/FX3UC PLCs
FX3U/FX3UC PLCs are equipped with the RAM memory as standard.
By mounting a memory cassette, the memory type can be changed.
1) When using the built-in memory (without attached memory cassette)
CPU System ROM
Built-in program memory
(RAM)
Parameter
File register (D)
Comment
Sequence program
Special setting
Memory cassette
(Flash memory)
Not attached
Built-in device memory (RAM)
[Bit device memory]
• Data register (D)
• Timer present value register (T)
• Counter present value register (C)
• Index register (V, Z)
Contact image memory
• Input relay (X) • Output relay (Y)
• Auxiliary relay (M) • State relay (S)
Timer contact and time counting coil
Counter contact, counting coil, and reset coil
• Extension register (R)
[Data memory]
Symbolic information
*1. Supported in Ver. 3.00 or later.
*1

Mitsubishi FX3G Series Specifications

General

Model	FX3G Series
Power Supply	AC 100-240V or DC 24V
Program Capacity	32, 000 steps
Execution Speed	0.21 µs/basic instruction
Communication Options	RS-422, USB, Ethernet
Expansion Modules	Analog, digital, communication
Programming Language	Ladder Logic, Instruction List
Built-in Functions	High-speed counters, pulse output
Analog I/O	Available via expansion modules