INTRODUCTION

Thank you for purchasing the MELSEC-Q series PLC.

Before using the equipment, please read this manual carefully to develop full familiarity with the functions and performance of the Q series PLC you have purchased, so as to ensure correct use.

Please forward a copy of this manual to the end user.

 

 

CONTENTS

 

 

SAFETY PRECAUTIONS

A- 1

REVISIONS

A- 4

Conformation to the EMC Directive and Low Voltage Instruction

A-

9

About the Generic Terms and Abbreviations

A- 9

Product Structure

A-10

 

 

1 OVERVIEW

1- 1 to 1- 2

1.1

Features

1-

1

1.2

Functions Added to Function Version B and Later

1- 2

 

 

2 SYSTEM CONFIGURATION

2- 1 to 2- 4

 

 

 

 

2.1

Applicable Systems

2-

1

2.2

How to Check the Function Version and Software Version

2- 3

 

 

3 SPECIFICATIONS

3- 1 to 3-26

3.1

Performance Specifications

3-

1

3.1.1

Performance specifications list

3-

1

3.1.2

I/O conversion characteristic

3-

2

3.1.3

Accuracy

3-

9

3.2

Function List

3-10

3.2.1 A/D conversion methods

3-10

3.2.2 Maximum and minimum values hold function

3-12

3.3

I/O Signals for the PLC CPU

3-12

3.3.1

List of I/O signals

3-12

3.3.2

Details of I/O signals

3-13

3.4

Buffer Memory

3-17

3.4.1 Buffer memory assignment (Q64AD)

3-17

3.4.2 Buffer memory assignment (Q68ADV)

3-18

3.4.3 Buffer memory assignment (Q68ADI)

3-19

3.4.4

A/D conversion enable/disable setting (buffer memory address 0: Un\G0)

3-20

3.4.5 CH average time/average number of times

 

 

 

 

(buffer memory addresses 1 to 8: Un\G1 to Un\G8)

3-20

3.4.6

Averaging processing setting (buffer memory address 9: Un\G9)

3-21

3.4.7

A/D conversion completed flag (buffer memory address 10: Un\G10)

3-22

3.4.8 Digital output values (buffer memory addresses 11 to 18: Un\G11 to Un\G18)

3-22

3.4.9 Write data error codes (buffer memory address 19: Un\G19)

3-23

3.4.10 Setting ranges (buffer memory addresses 20, 21: Un\G20, Un\G21)

3-23

3.4.11 Offset/gain setting mode (buffer memory addresses 22, 23: Un\G22, Un\G23)

3-24

A - 6

A - 6

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Mitsubishi Electronics Q68ADV, Q68ADI, Q64AD user manual Overview

Q68ADV, Q68ADI, Q64AD specifications

Mitsubishi Electronics, a renowned leader in automation technology, has developed advanced analog input modules that play a crucial role in numerous industrial applications. Among them, the Q64AD, Q68ADI, and Q68ADV models stand out with their impressive features and capabilities tailored for precise data acquisition and control.

The Q64AD module is designed for high-performance analog signal processing. It offers up to 16 channels of differential input, making it suitable for applications requiring multiple sensor readings simultaneously. The resolution of 16 bits enables accurate data capture, ensuring that subtle variations in process variables, such as temperature or pressure, are detectable. One of its key advantages is the high-speed sampling capability, allowing data collection at rates of up to 100 milliseconds per channel, essential for real-time monitoring in fast-paced environments.

In contrast, the Q68ADI model enhances the versatility of the analog input system. It includes built-in isolators, providing additional protection against noise and interference commonly found in industrial settings. This isolation feature improves the reliability of sensor readings, especially in harsh environments where electrical noise can impact performance. Furthermore, the Q68ADI supports both voltage and current input types, making it adaptable to various sensor configurations, such as thermocouples and RTDs, expanding its usability across different applications.

The Q68ADV module takes versatility a step further by integrating advanced diagnostic features. This model offers a range of additional functions, including built-in fault detection and self-diagnosis capabilities that identify issues before they escalate into significant problems. It also features temperature compensation and linearization algorithms, which enhance the accuracy of reading from thermocouples and other temperature sensors. The Q68ADV module is ideal for applications demanding high reliability and stringent performance standards, making it indispensable in industries like pharmaceuticals and food processing.

All three models are designed to seamlessly integrate with Mitsubishi's PLC systems, ensuring smooth communication and data exchange. They support various protocols, making them compatible with a wide range of devices and systems. Collectively, the Q64AD, Q68ADI, and Q68ADV modules exemplify Mitsubishi Electronics' commitment to delivering high-quality, reliable, and innovative solutions in industrial automation, empowering businesses to achieve greater efficiency and operational excellence.