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Introduction
Thank you for purchasing the Mitsubishi programmable logic controller MELSEC-QnA series.
Before using your new PLC, please read this manual thoroughly to gain an understanding of its functions so
that you can use it properly.
Please forward a copy of this manual to the end user.
Table of Contents
1 ABOUT THIS MANUAL 1 - 1 to 1 - 2
1.1 About this Manual..........................................................................................................................1 - 1
1.2 Abbreviations and Generic Terms Used in this Manual ................................................................1 - 2
2 OVERVIEW 2 - 1 to 2 - 8
2.1 Features ........................................................................................................................................2 - 1
2.2 Additional Functions of QnACPU ..................................................................................................2 - 5
2.2.1 Overview of added functions.................................................................................................2 - 7
3 SYSTEM CONFIGURATION 3 - 1 to 3 - 25
3.1 System Configuration ....................................................................................................................3 - 1
3.1.1 Equipment configuration in a stand-alone system ................................................................3 - 1
3.1.2 Configuration of peripheral devices capable of QnACPU .....................................................3 - 2
3.2 System Configuration Overview ....................................................................................................3 - 3
3.3 System Equipment ........................................................................................................................3 - 6
3.3.1 System equipment list ...........................................................................................................3 - 6
3.3.2 Precautions when configuring the system...........................................................................3 - 21
3.3.3 QnACPU memory block diagram ........................................................................................3 - 25
4 PERFORMANCE SPECIFICATIONS 4 - 1 to 4 - 3
5 I/O NUMBER ASSIGNMENT 5 - 1 to 5 - 14
5.1 I/O Numbers..................................................................................................................................5 - 1
5.2 I/O Number Assignment Concept..................................................................................................5 - 2
5.3 I/O Assignment with GPP Function ...............................................................................................5 - 4
5.4 Example of I/O Number Assignment .............................................................................................5 - 9
6 DATA COMMUNICATIONS WITH SPECIAL FUNCTION MODULES 6 - 1 to 6 - 5
6.1 Reading/Writing Data from/to the QnACPU Using the FROM/TO Instruction...............................6 - 2
6.2 Reading/Writing Data from/to the QnACPU Using Special Direct Devices ...................................6 - 3
6.3 Processing for Data Communication Requests from a Special Function Module .........................6 - 5
7 AUTO REFRESH FUNCTION 7 - 1 to 7 - 14
7.1 For MELSECNET/MINI-S3............................................................................................................7 - 1
7.2 Auto Refresh Setting of CC-Link ...................................................................................................7 - 8
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