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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.
SAFETY PRECAUTIONS..............................................................................................................................A- 1
REVISIONS ....................................................................................................................................................A- 4
Conformation to the EMC Directive and Low Voltage Instruction ................................................................A- 8
About the Generic Terms and Abbreviations ................................................................................................A- 8
Product Configuration ....................................................................................................................................A- 9
1.1 Features .................................................................................................................................................. 1- 1
2.1 Overall Configuration .............................................................................................................................. 2- 1
2.2 Applicable Systems................................................................................................................................. 2- 3
2.3 How to Check the Function Version, Serial No. and Software Version ................................................ 2- 4
2.4 About Use of the QJ71DN91 with the Q00J/Q00/Q01CPU .................................................................. 2- 5
2.5 Compatible DeviceNet Products from Other Manufacturers ................................................................. 2- 5
3.1 Performance Specifications .................................................................................................................... 3- 1
3.1.1 Maximum transmitting distance when thick and thin cables coexist .............................................. 3- 1
3.2 Functions ................................................................................................................................................. 3- 2
3.2.1 Master function (I/O communication function)................................................................................. 3- 2
3.2.2 Master function (Message communication function) ...................................................................... 3- 8
3.2.3 Slave function (I/O communication function)................................................................................... 3-11
3.3 I/O Signals for the PLC CPU .................................................................................................................. 3-13
3.3.1 I/O signal list ..................................................................................................................................... 3-13
3.3.2 Details of the I/O signals .................................................................................................................. 3-14
3.4 Buffer Memory......................................................................................................................................... 3-24
3.4.1 Buffer memory list ............................................................................................................................ 3-24
3.4.2 Buffer memory details ...................................................................................................................... 3-26
3.5 Communication Performance ................................................................................................................. 3-49
3.5.1 Scan time.......................................................................................................................................... 3-49
3.5.2 Communication cycle ....................................................................................................................... 3-50
3.5.3 Transmission delays ........................................................................................................................ 3-50
A - 5
INTRODUCTION
CONTENTS
1- 1 to 1- 2
2- 1 to 2- 5
3- 1 to 3- 50
A - 5
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