Mitsubishi FX3G Series Programming Manual

135
FX3G/FX3U/FX3GC/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
4 Devices in Detail
4.10 Extension Register [R] and Extension File Register [ER]
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
4.10.6 Functions and operation examples of extension file registers
Extension file registers (ER) are usually used as log data storage destinations and set data storage destinations.
Extension file registers can be handled only with dedicated instructions shown in the table below. When using data
contents with other instructions, transfer them to an extension register of the same device number, and then use the
extension register.
However, extension file registers (ER) are available in FX
3U/FX3UC PLCs only when the memory cassette is attached.
•FX3U/FX3UC PLCs
*1. Extension file registers are only accessible when a memory cassette is mounted.
•FX3G/FX3GC PLCs
*2. When the memory cassette is attached, extension file registers in the memory cassette are accessed.
When the memory cassette is not attached, extension file registers in the EEPROM built in the PLC are
accessed.
Instruction Description
LOADR(FNC290)
This (transfer) instruction reads data of extension file registers (ER)
*1
to extension registers (R).
SAVER(FNC291)
This (transfer) instruction writes data of extension registers (R) to extension file registers (ER)
*1
in 2048 point (1
sector) units. Use this instruction to store newly created sectors (2048 points) of data to extension file registers
(ER)
*1
.
INITR(FNC292)
This instruction initializes extension registers (R) and extension file registers (ER)
*1
in 2048 point (1 sector) units.
Use this instruction to initialize extension registers (R) and extension file registers (ER)
*1
before starting to log data
by the LOGR instruction.
LOGR(FNC293)
This instruction logs specified data, and writes it to extension registers (R) and extension file registers (ER)
*1
.
RWER(FNC294)
This (transfer) instruction writes specified extension registers (R) to extension file registers (ER)
*1
.This instruction is
supported in FX3UC PLC Ver. 1.30 or later.Use this instruction to store the contents of any extension register (R) to
extension file register (ER)
*1
.
INITER(FNC295)
This instruction initializes extension file registers (ER)
*1
in 2048 point (1 sector) units. This instruction is supported
in FX3UC PLC Ver. 1.30 or later.Use this instruction to initialize extension file registers (ER)
*1
before executing
SAVER instruction.
Instruction Description
LOADR(FNC290)
This (transfer) instruction reads data of extension file registers (ER)
*2
to extension registers (R).
RWER(FNC294)
This (transfer) instruction writes specified extension registers (R) to extension file registers (ER)
Use this instruction to store the contents of any extension register (R) in extension file registers (ER)
*2
.

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