A - 6 A - 6
INTRODUCTION
Thank you for purchasing the MELSEC-Q series programmable controller.
Before using the equipment, please read this manual carefully to develop full familiarity with the functions
and performance of the Q series programmable controller you have purchased, so as to ensure correct use.
CONTENTS
SAFETY PRECAUTIONS..............................................................................................................................A- 1
REVISIONS ....................................................................................................................................................A- 5
INTRODUCTION............................................................................................................................................A- 6
CONTENTS....................................................................................................................................................A- 6
Compliance with the EMC and Low Voltage Directives................................................................................A-10
The Manual's Usage and Structure ...............................................................................................................A-11
About the Generic Terms and Abbreviations ................................................................................................A-13
Meanings and Definitions of Terms ..............................................................................................................A-14
Product Configuration ....................................................................................................................................A-14
1 OVERVIEW
1- 1 to 1- 5
1.1 Features ................................................................................................................................................... 1- 1
2 SYSTEM CONFIGURATION
2- 1 to 2- 9
2.1 Applicable Systems.................................................................................................................................. 2- 1
2.2 Devices Necessary for Network Configuration ....................................................................................... 2- 4
2.3 System Configuration and Access Range .............................................................................................. 2- 5
2.4 Precautions for System Configuration..................................................................................................... 2- 7
2.5 How to Check the Function Version and Software Version ................................................................... 2- 8
3 SPECIFICATIONS
3- 1 to 3- 9
3.1 Performance Specifications ..................................................................................................................... 3- 1
3.2 I/O Signals for Programmable Controller CPU ....................................................................................... 3- 2
3.2.1 I/O signal list ...................................................................................................................................... 3- 2
3.3 Applications and Assignment of Buffer Memory ..................................................................................... 3- 4
3.3.1 Buffer memory list ............................................................................................................................. 3- 4
4 MODBUS
R
STANDARD FUNCTIONS
4- 1 to 4-20
4.1 MODBUS
R
Standard Function Support List........................................................................................... 4- 1
4.2 Frame Specifications ............................................................................................................................... 4- 3
4.3 PDU Formats by Functions...................................................................................................................... 4- 4
4.3.1 Read coils (FC: 01) ........................................................................................................................... 4- 6
4.3.2 Read discrete inputs (FC: 02)........................................................................................................... 4- 7
4.3.3 Read holding registers (FC: 03)........................................................................................................ 4- 8
4.3.4 Read input registers (FC: 04) ........................................................................................................... 4- 9
4.3.5 Write single coil (FC: 05)................................................................................................................... 4-10
4.3.6 Write single register (FC: 06) ............................................................................................................ 4-11
4.3.7 Write multiple coils (FC: 15).............................................................................................................. 4-12
4.3.8 Write multiple registers (FC: 16) ....................................................................................................... 4-14
