FXCPUStructured Programming ManualDevice & Common

Mitsubishi Electric MELSEC-Q Structured Programming Manual

FX3G SERIES

SAFETY PRECAUTIONS

Outline and Features of Analog Control

Analog input control

Analog output control

Temperature sensor input control

Types of Analog Products

Special adapter

Special function block

List of Analog Product Models

System Configuration Drawings of Analog Products A

FX 3G Series PLC

Connection of special function blocks

Connection of special adapters

FX 3UC Series PLC

Analog Input

FX 2N -4AD

Mixed Analog Input/Output

Temperature Sensor Input

Version Number

Version check

Manual Introduction (Types, Contents, and Obtainment)

Description of Related Manuals

Manuals of analog units

Generic Names and Abbreviations in This Manual

FX 2NC -4AD

Outline

Setup Procedure Before Starting Operation

Connectable PLC and Version Numbers

Specifications

Power Supply Specifications

Input Mode (Characteristics) BFM#0

Wiring

Terminal Layout

Cable and Terminal Tightening Torque

Examples of Power Supply Circuit

Cautions regarding connection of power cables

Analog Input Line

Grounding

Buffer Memory (BFM)

Buffer Memory Reading/Writing Method

Buffer Memory List (BFM)

Buffer Memory Details

BFM#2 to #5: Averaging time

BFM#6 to #9: Digital filter setting

BFM#10 to #13: Channel data

BFM#19: Data change disable

BFM#22: Convenient function setting

BFM#26: Upper/lower limit error status

BFM#27: Abrupt change detection status

BFM#28: Over-scale status

BFM#29: Error status

BFM#30: Model code

BFM#61 to #64: Addition data

BFM#71 to #74: Lower limit error setting / BFM#81 to #84: Upper limit error setting

BFM#91 to #94: Abrupt change detection value setting

BFM#99: Clearance of upper/lower limit error data and abrupt change detection data

BFM#109: Minimum peak value resetting / BFM#119: Maximum peak value resetting

BFM#126: Upper/lower error status data automatic transfer-to data register specification

BFM#127: Abrupt change detection status data automatic transfer-to data register specification

BFM#128: Over-scale status data automatic transfer-to data register specification

BFM#197: Selection of cyclic data update function (function for data history)

BFM#199: Data history resetting/stoppage

BFM#200 to #6999: Data history

Changing Input Characteristics

Examples of Practical Programs

Program That Uses Convenient Functions

Program That Uses Data History Function

Initialization Program for 4AD (Factory Default)

Troubleshooting

Error Status Check

AD Initialization and Test Program

Connectable PLCs and Version Number

Compatible Programming Tool Version Number

A/D Conversion Time

Related manuals

Generic Names and Abbreviations Used in Manuals

Introduction

Applicability of programming languages in programming software

Overview (Sequence Program)

Convenient functions for output processing

Introduction of Applied Instructions

Analog/Positioning Special Control

Introduction of Devices Constructing PLC

Device list

Program Memory and Devices

Memory operations and latched (battery or EEPROM backed) devices power ON/OFF and RUN/STOP)

Types of backup methods against power failure

Change between general devices and latched (battery backed) devices

Types and Setting of Parameters

Parameter initial values and available tools for changing parameter values

Memory capacity setting range

Compatible optional memory model

Keyword (entry code)

Special unit initial value setting [GX Developer Ver.8.24A or later]

Instruction List

Step Ladder Instructions

Devices in Detail

I/O Relays [X, Y]

Functions and roles

Operation timing of input relays

Auxiliary Relay [M]

State Relay [S]

Functions and operation examples

Timer [T]

Set value specification method

Program examples [off-delay timer and flicker timer]

Handling timers as numeric devices

Counter [C]

Handling counters as numeric devices

High-Speed Counter [C] (FX 3U /FX 3UC PLC)

Input assignment for high-speed counters

Handling of high-speed counters

Current value update timing and comparison of current value

Related devices

Changing the logic of external reset input signal

How to use 2-phase 2-count input counters C251 to C255 with 4 edge counting

Conditions for hardware counters to be handled as software counters

Response frequency of high-speed counters

Cautions on use

High-Speed Counter [C] (FX 3G PLCs)

Assignment of counter input terminal and switching of function

Data Register and File Register [D]

Structures of data registers and file registers

Functions and operation examples of data registers

Functions and operation examples of file registers

Cautions on using file registers

Extension Register [R] and Extension File Register [ER]

Structures of extension registers and extension file registers

Functions and operation examples of extension registers

Functions and operation examples of extension file registers

Cautions on using extension file registers

Registration of data in extension registers and extension file registers

Index Register [V and Z]

Indexing of devices

Pointer [P and I]

Functions and operation examples of pointers for interrupt

How to Specify Devices and Constants to Instructions

Conversion of numeric values

Handling of numeric values in floating point operations

Specification of Constants K, H and E (Decimal, Hexadecimal and Real Number)

Character Strings

Specification of Digits for Bit Devices (Kn[ ]***)

Bit Specification of a Word Device (D[ ].b)

Indexing

Indexing in applied instructions

Indexing example for instruction with limited number of use

What to Understand before Programming

Cautions on Creation of Fundamental Programs

Double output (double coil) operation and countermeasures

Circuits which cannot be programmed and countermeasures

I/O Processing and Response Delay

Mutual Relationship Among Program Flow Control Instructions

General Rules for Applied Instructions

Handling of general flags

Handling of operation error flag

Limitation in the number of instructions and limitation in simultaneous instruction instances

Mitsubishi Electric MELSEC-Q Structured Programming Manual

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