Mitsubishi Electric Q68AD-G User manual

Channel Isolated Analog-Digital Converter Module/
Channel Isolated Analog-Digital Converter Module
(With Signal Conditioning Function)
User's Manual
-Q68AD-G
-Q66AD-DG
-GX Configurator-AD (SW2D5C-QADU-E)

A- 1
SAFETY PRECAUTIONS
(Read these precautions before using this product.)
Before using this product, please read this manual and the relevant manuals carefully and pay full attention
to safety to handle the product correctly.
In this manual, the safety precautions are classified into two levels: " WARNING" and " CAUTION".
Under some circumstances, failure to observe the precautions given under " CAUTION" may lead to
serious consequences.
Observe the precautions of both levels because they are important for personal and system safety.
Make sure that the end users read this manual and then keep the manual in a safe place for future
reference.
[Design Precaution]
WARNING
Do not write any data to the "system area" or "write-protect area" of the buffer memory areas in
the intelligent function module. Also, do not use any "prohibited to use" signals as an output
signal to an intelligent function module from the programmable controller CPU.
Doing so may cause malfunction of the programmable controller system.
CAUTION
Do not bunch the control wires or communication cables with the main circuit or power wires, or
install them close to each other.
They should be installed 100mm or more from each other.
Not doing so could result in noise that may cause malfunction.
WARNING
CAUTION
Indicates that incorrect handling may cause hazardous conditions,
resulting in death or severe injury.
Indicates that incorrect handling may cause hazardous conditions,
resulting in minor or moderate injury or property damage.

A- 2
[Installation Precautions]
CAUTION
Use the programmable controller in an environment that meets the general specifications
contained in the user's manual of the CPU module to use.
Using this programmable controller in an environment outside the range of the general
specifications may cause electric shock, fire, malfunction, and damage to or deterioration of the
product.
While pressing the installation lever located at the bottom of module, insert the module fixing tab
into the fixing hole in the base unit until it stops. Then, securely mount the module with the fixing
hole as a supporting point.
For the Q66AD-DG, secure the module with fixing brackets after installation to the base unit.
When using the Q68AD-G in an environment where they are frequent vibrations, screw the module
to the base unit after installation.
Tighten the screws within the range of specified torque.
If the screws are loose, it may cause the module to fallout, short circuits, or malfunction.
If the screws are tightened too much, it may cause damage to the screw and/or the module,
resulting in fallout, short circuits or malfunction.
Be sure to shut off all phases of the external power supply used by the system before mounting or
removing the module.
Not doing so may cause damage to the module.
In the system where a CPU module supporting the online module change is used and on the
MELSECNET/H remote I/O stations, modules can be replaced online (during energizing).
However, there are some restrictions on replaceable modules and the replacement procedures
are predetermined for each module.
For details, refer to the chapter of the online module change in this manual.
Do not directly touch the conductive area or electronic components of the module.
Doing so may cause malfunction or failure in the module.

A- 3
[Wiring Precautions]
CAUTION
Individually ground the FG terminal of the programmable controller with a ground resistance of
100Ωor less.
Not doing so can cause an electric shock or malfunction.
When turning on the power and operating the module after wiring is completed, always attach the
terminal cover that comes with the product.
There is a risk of electric shock if the terminal cover is not attached.
Tighten the terminal screws within the range of specified torque.
If the terminal screws are loose, it may result in short circuits or malfunction.
If the terminal screws are tightened too much, it may cause damage to the screw and/or the
module, resulting in short circuits or malfunction.
Be careful not to let foreign matter such as sawdust or wire chips get inside the module.
They may cause fires, failure or malfunction.
The top surface of the module is covered with protective film to prevent foreign objects such as
cable offcuts from entering the module when wiring.
Do not remove this film until the wiring is complete.
Before operating the system, be sure to remove the film to provide adequate ventilation.

A- 4
[Starting and Maintenance Precautions]
[Disposal Precautions]
CAUTION
Do not disassemble or modify the modules.
Doing so could cause failure, malfunction injury or fire.
Be sure to shut off all phases of the external power supply used by the system before mounting or
removing the module.
Not doing so may cause failure or malfunction of the module.
In the system where a CPU module supporting the online module change is used and on the
MELSECNET/H remote I/O stations, modules can be replaced online (during energizing).
However, there are some restrictions on replaceable modules and the replacement procedures
are predetermined for each module.
For details, refer to the chapter of the online module change in this manual.
Do not install/remove the module to/from the base unit more than 50 times after the first use of the
product. (IEC 61131-2 compliant)
Failure to do so may cause malfunction.
Do not touch the connector while the power is on.
Doing so may cause malfunction.
Be sure to shut off all phases of the external power supply before cleaning or retightening the
terminal screws or module fixing screws.
Not doing so may cause failure or malfunction of the module.
If the screws are loose, it may cause the module to fallout, short circuits, or malfunction.
If the screws are tightened too much, it may cause damages to the screws and/or the module,
resulting in the module falling out, short circuits or malfunction.
Always make sure to touch the grounded metal to discharge the electricity charged in the body,
etc., before touching the module.
Failure to do so may cause a failure or malfunctions of the module.
CAUTION
When disposing of this product, treat it as industrial waste.

A- 5
CONDITIONS OF USE FOR THE PRODUCT
(1) Mitsubishi programmable controller ("the PRODUCT") shall be used in conditions;
i) where any problem, fault or failure occurring in the PRODUCT, if any, shall not lead to any major
or serious accident; and
ii) where the backup and fail-safe function are systematically or automatically provided outside of
the PRODUCT for the case of any problem, fault or failure occurring in the PRODUCT.
(2) The PRODUCT has been designed and manufactured for the purpose of being used in general
industries.
MITSUBISHI SHALL HAVE NO RESPONSIBILITY OR LIABILITY (INCLUDING, BUT NOT
LIMITED TO ANY AND ALL RESPONSIBILITY OR LIABILITY BASED ON CONTRACT,
WARRANTY, TORT, PRODUCT LIABILITY) FOR ANY INJURY OR DEATH TO PERSONS OR
LOSS OR DAMAGE TO PROPERTY CAUSED BY the PRODUCT THAT ARE OPERATED OR
USED IN APPLICATION NOT INTENDED OR EXCLUDED BY INSTRUCTIONS, PRECAUTIONS,
OR WARNING CONTAINED IN MITSUBISHI'S USER, INSTRUCTION AND/OR SAFETY
MANUALS, TECHNICAL BULLETINS AND GUIDELINES FOR the PRODUCT.
("Prohibited Application")
Prohibited Applications include, but not limited to, the use of the PRODUCT in;
• Nuclear Power Plants and any other power plants operated by Power companies, and/or any
other cases in which the public could be affected if any problem or fault occurs in the PRODUCT.
• Railway companies or Public service purposes, and/or any other cases in which establishment of
a special quality assurance system is required by the Purchaser or End User.
• Aircraft or Aerospace, Medical applications, Train equipment, transport equipment such as
Elevator and Escalator, Incineration and Fuel devices, Vehicles, Manned transportation,
Equipment for Recreation and Amusement, and Safety devices, handling of Nuclear or
Hazardous Materials or Chemicals, Mining and Drilling, and/or other applications where there is a
significant risk of injury to the public or property.
Notwithstanding the above, restrictions Mitsubishi may in its sole discretion, authorize use of the
PRODUCT in one or more of the Prohibited Applications, provided that the usage of the PRODUCT
is limited only for the specific applications agreed to by Mitsubishi and provided further that no
special quality assurance or fail-safe, redundant or other safety features which exceed the general
specifications of the PRODUCTs are required. For details, please contact the Mitsubishi
representative in your region.

A- 6
REVISIONS
* The manual number is given on the bottom left of the back cover.
Print Date *Manual Number Revision
Oct., 2006 SH (NA)-080647ENG-A First edition
Jan., 2007 SH(NA)-080647ENG-B
Section 3.3.2, 3.4.12, 4.6.2, 6.3.1, 6.3.2, 6.5.1, 6.5.2
Jan., 2008 SH(NA)-080647ENG-C
SAFETY PRECAUTIONS, About the Generic Terms and Abbreviations, Section
1.1, Section 2.1, Section 2.3, Section 3.2.1, Section 3.4.1, Section 4.1, Section
4.4.2, Section 4.6.1, Section 4.6.2, Section 5.2.1, Section 5.2.2, Section 5.3.2,
Section 5.3.3, Section 5.6.1, Section 5.6.4, Section 5.6.5, Section 7.3.3, Section
7.3.5, Section 8.1, Appendix 1, Appendix 1.1, Appendix 1.2, Appendix 1.3
Section 2.2
May, 2008 SH(NA)-080647ENG-D
SAFETY PRECAUTIONS, Compliance with the EMC and Low Voltage Direc-
tives, About the Generic Terms and Abbreviations, Section 2.1, 2.3, Section
3.1.1, 3.2.1, 3.2.4, Section 4.1, 4.3, Section 5.2.1, 5.2.2, 5.3.1, 5.3.2, 5.3.3,
Chapter 7, Section 7.1
Oct., 2008 SH(NA)-080647ENG-E
Section 2.1, Section 3.1.1, 3.1.2, 3.2, 3.2.1, 3.2.3, 3.2.6, 3.3.2, 3.4.1, 3.4.2,
3.4.4, 3.4.7, 3.4.9, 3.4.11, 3.4.12, 3.4.13, 3.4.22, Section 4.3, 4.5, Section 5.1,
5.4, Section 8.1, 8.2.4, 8.2.6, Appendix 1.1, 1.2, 1.3
Appendix 2
Sep., 2011 SH(NA)-080647ENG-F
SAFETY PRECAUTIONS, COMPLIANCE WITH THE EMC AND LOW VOLT-
AGE DIRECTIVES, Section 4.6.1, 4.6.2, 4.6.3, 6.2.1, 6.2.2, 6.2.3, 6.3, 6.3.1,
6.3.2, 6.4, 6.4.1, 6.4.2, 6.4.3, 6.5, 6.5.1, 6.5.2
CONDITIONS OF USE FOR THE PRODUCT
Feb., 2012 SH(NA)-080647ENG-G
SAFETY PRECAUTIONS, COMPLIANCE WITH THE EMC AND LOW VOLT-
AGE DIRECTIVES, Section 1.1, 2.1 to 2.3, 3.1.1, 3.1.2, 3.2, 3.2.1, 3.2.3, 3.2.4,
3.2.6, 3.3.2, 3.4.1, 3.4.2, 3.4.4, 3.4.5, 3.4.7, 3.4.10, 3.4.15 to 3.4.17, 3.4.19,
3.4.21, 3.4.22, 3.4.25, 4.1, 4.1.1, 4.3, 4.4.2, 4.5, 4.6.1, 4.6.2, 5.2.1, 5.2.2, 5.3.1,
5.3.3, 5.4, 5.5, 5.6.1 to 5.6.3, 6.2.1, 6.2.2, 6.3, 6.3.1, 6.4.1, 6.4.2, 6.5, 6.5.1,
Chapter 7, 7.1, 7.2, 7.3.1 to 7.3.6, 7.5, 8.1, 8.2.4, 8.2.6, Appendix 2, Appendix 3
Correction
Correction
Addition
Correction
Correction
Addition
Correction
Addition
Correction

A- 7
Japanese Manual Version SH-080645-L
© 2006 MITSUBISHI ELECTRIC CORPORATION
Print Date *Manual Number Revision
Dec., 2015 SH(NA)-080647ENG-H
SAFETY PRECAUTIONS, MANUALS, COMPLIANCE WITH THE EMC, LOW
VOLTAGE, AND MACHINERY DIRECTIVES, GENERIC TERMS AND ABBRE-
VIATIONS, Section 2.1, 3.1, 3.1.1, 3.2, 3.3.2, 3.4.2, 3.4.4, 4.4.2, 4.6.2, 5.2.1,
5.2.2, 6.3.2, 6.4.2, 6.5.1, 6.5.2, 8.1, 8.2.1, 8.2.4, Appendix 2
Jul., 2017 SH(NA)-080647ENG-I
INTRODUCTION, COMPLIANCE WITH THE EMC, LOW VOLTAGE, AND
MACHINERY DIRECTIVES, GENERIC TERMS AND ABBREVIATIONS, Sec-
tion 2.1, 2.3, 4.3, 4.4.2, 4.4.3, 6.2.1, 6.4.1, Appendix 3
This manual confers no industrial property rights or any rights of any other kind, nor does it confer any patent
licenses. Mitsubishi Electric Corporation cannot be held responsible for any problems involving industrial
property rights which may occur as a result of using the contents noted in this manual.
Correction
Correction

A- 8
SAFETY PRECAUTIONS .................................................................................................................................A - 1
CONDITIONS OF USE FOR THE PRODUCT..................................................................................................A - 5
REVISIONS.......................................................................................................................................................A - 6
INTRODUCTION...............................................................................................................................................A - 8
CONTENTS ......................................................................................................................................................A - 8
MANUALS.......................................................................................................................................................A - 12
COMPLIANCE WITH THE EMC, LOW VOLTAGE, AND MACHINERY DIRECTIVES ..................................A - 12
GENERIC TERMS AND ABBREVIATIONS....................................................................................................A - 13
PACKING LIST ...............................................................................................................................................A - 14
1 OVERVIEW 1 - 1 to 1 - 3
1.1 Features........................................................................................................................................... 1 - 1
2 SYSTEM CONFIGURATION 2 - 1 to 2 - 6
2.1 Applicable Systems ......................................................................................................................... 2 - 1
2.2 Precautions on System Configuration ............................................................................................. 2 - 3
2.3 How to Check the Function Version, Serial No., and Software Version .......................................... 2 - 4
3 SPECIFICATIONS 3 - 1 to 3 - 75
3.1 Performance Specifications ............................................................................................................. 3 - 1
3.1.1 Performance specifications list ............................................................................................... 3 - 1
3.1.2 I/O conversion characteristic .................................................................................................. 3 - 5
3.1.3 Accuracy............................................................................................................................... 3 - 12
3.2 Function List .................................................................................................................................. 3 - 13
3.2.1 A/D conversion methods ...................................................................................................... 3 - 15
3.2.2 Maximum and minimum values hold function....................................................................... 3 - 18
3.2.3 Input signal error detection function ..................................................................................... 3 - 18
3.2.4 Warning output function........................................................................................................ 3 - 25
3.2.5 Conversion starting time setting function (Q66AD-DG only) ................................................ 3 - 29
3.2.6 Scaling Function ................................................................................................................... 3 - 30
3.3 I/O Signals for the Programmable Controller CPU ........................................................................ 3 - 33
3.3.1 List of I/O signals .................................................................................................................. 3 - 33
3.3.2 Details of I/O signals............................................................................................................. 3 - 35
3.4 Buffer Memory ............................................................................................................................... 3 - 43
3.4.1 Buffer memory assignment...................................................................................................3-43
INTRODUCTION
Thank you for purchasing the Mitsubishi Electric MELSEC-Q series programmable controllers.
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.
Please forward a copy of this manual to the end user.
CONTENTS

A- 9
3.4.2 A/D conversion enable/disable setting (Un\G0).................................................................... 3 - 55
3.4.3 CH[ ] average time/average number of times/moving average/time constant settings
(Un\G1 to Un\G8) ................................................................................................................. 3 - 56
3.4.4 A/D conversion completed flag (Un\G10) ............................................................................. 3 - 57
3.4.5 CH[ ] digital output value (Un\G11 to Un\G18) ..................................................................... 3 - 58
3.4.6 Write data error code (Un\G19) ............................................................................................ 3 - 59
3.4.7 Setting range (Un\G20, Un\G21) .......................................................................................... 3 - 59
3.4.8 Offset/gain setting mode offset/gain specification (Un\G22, Un\G23) .................................. 3 - 60
3.4.9 Averaging process specification (Un\G24, Un\G25))............................................................ 3 - 61
3.4.10 CH[ ] maximum value/minimum value storage area (Un\G30 to Un\G45)............................ 3 - 62
3.4.11 Input signal error detection extended/input signal error detection setting (Un\G47) ............ 3 - 62
3.4.12 Warning output settings (Un\G48) ........................................................................................ 3 - 64
3.4.13 Input signal error detection flag (Un\G49) ............................................................................ 3 - 65
3.4.14 Warning output flag (Un\G50,Un\51) .................................................................................... 3 - 66
3.4.15 Scaling enable/disable setting (Un\G53) .............................................................................. 3 - 66
3.4.16 CH[ ] scaling value storage area (Un\G54 to Un\G61) ......................................................... 3 - 67
3.4.17 CH[ ] scaling upper / lower limit value (Un\G62 to Un\G77) ................................................. 3 - 67
3.4.18 CH[ ] conversion starting time setting (for 2-wire transmitter) (Un\G78 to Un\G83)
(Q66AD-DG only) .................................................................................................................3-67
3.4.19 CH[ ] process alarm upper/lower limit value (Un\G86 to Un\G117)...................................... 3 - 68
3.4.20 CH[ ] rate alarm warning detection period (Un\G118 to Un\G125)....................................... 3 - 69
3.4.21 CH[ ] rate alarm upper/lower limit value (Un\G126 to Un\G141) .......................................... 3 - 70
3.4.22 CH[ ] input signal error detection setting value/CH[ ] Input signal error detection lower
limit setting value (Un\G142 to Un\G149)
CH[ ] Input signal error detection upper limit setting value (Un\G150 to Un\G157).............. 3 - 71
3.4.23 Mode switching setting (Un\G158, Un\G159) ....................................................................... 3 - 74
3.4.24 Save data classification setting (Un\G200) (Q68AD-G only)................................................ 3 - 74
3.4.25 Factory default and User range settings offset/gain value (Un\G202 to Un\G233) .............. 3 - 75
4 SETUP AND PROCEDURES BEFORE OPERATION 4 - 1 to 4 - 24
4.1 Handling Precautions....................................................................................................................... 4 - 1
4.1.1 Attaching a module fixing bracket (Q66AD-DG only) ............................................................. 4 - 2
4.2 Setup and Procedures before Operation ......................................................................................... 4 - 3
4.3 Part Names...................................................................................................................................... 4 - 4
4.4 Wiring............................................................................................................................................... 4 - 7
4.4.1 Wiring precautions.................................................................................................................. 4 - 7
4.4.2 External wiring ........................................................................................................................ 4 - 8
4.4.3 Connector/terminal block converter module ......................................................................... 4 - 11
4.5 Intelligent Function Module Switch Setting .................................................................................... 4 - 12
4.6 Offset/Gain Settings....................................................................................................................... 4 - 14
4.6.1 Offset/gain settings (Q68AD-G)............................................................................................ 4 - 15
4.6.2 Offset/gain settings (Q66AD-DG) ......................................................................................... 4 - 19
4.6.3 A/D conversion value storage during offset/gain setting ...................................................... 4 - 24
5 UTILITY PACKAGE (GX Configurator-AD) 5 - 1 to 5 - 33
5.1 Utility Package Functions ................................................................................................................ 5 - 1
5.2 Installing and Uninstalling the Utility Package ................................................................................. 5 - 2

A- 10
5.2.1 Handling precautions.............................................................................................................. 5 - 2
5.2.2 Operating environment ........................................................................................................... 5 - 4
5.3 Utility Package Operation ................................................................................................................ 5 - 6
5.3.1 Common utility package operations ....................................................................................... 5 - 6
5.3.2 Operation overview................................................................................................................. 5 - 9
5.3.3 Starting the intelligent function module utility ....................................................................... 5 - 11
5.4 Initial Setting .................................................................................................................................. 5 - 14
5.5 Auto Refresh Setting...................................................................................................................... 5 - 16
5.6 Monitoring/Test .............................................................................................................................. 5 - 18
5.6.1 Monitor/test window.............................................................................................................. 5 - 18
5.6.2 Offset/gain setting operation................................................................................................. 5 - 21
5.6.3 Confirmation of conversion characteristic............................................................................. 5 - 23
5.6.4 Pass data (Q68AD-G) .......................................................................................................... 5 - 25
5.6.5 Pass data (Q66AD-DG) ........................................................................................................ 5 - 27
5.7 FB Conversion of Initial Setting/Auto Refresh Setting ................................................................... 5 - 28
5.8 Usage of FB................................................................................................................................... 5 - 30
5.8.1 Outline .................................................................................................................................. 5 - 30
5.8.2 Paste an FB to a sequence program .................................................................................... 5 - 32
5.8.3 Convert (compile) a sequence program ............................................................................... 5 - 33
6 PROGRAMMING 6 - 1 to 6 - 38
6.1 Programming Procedure.................................................................................................................. 6 - 1
6.2 For Use in Normal System Configuration (Q68AD-G) ..................................................................... 6 - 2
6.2.1 Before creating a program ...................................................................................................... 6 - 3
6.2.2 Programming example using the utility package .................................................................... 6 - 5
6.2.3 Programming example without using the utility package........................................................ 6 - 8
6.3 For Use in Remote I/O Network (Q68AD-G) ................................................................................. 6 - 11
6.3.1 Programming example using the utility package .................................................................. 6 - 14
6.3.2 Programming example without using the utility package...................................................... 6 - 17
6.4 For Use in Normal System Configuration (Q66AD-DG)................................................................. 6 - 21
6.4.1 Before creating a program .................................................................................................... 6 - 22
6.4.2 Programming example using the utility package .................................................................. 6 - 24
6.4.3 Programming example without using the utility package...................................................... 6 - 27
6.5 For Use in Remote I/O Network (Q66AD-DG)............................................................................... 6 - 30
6.5.1 Programming example using the utility package .................................................................. 6 - 32
6.5.2 Programming example without using the utility package...................................................... 6 - 35
7 ONLINE MODULE CHANGE 7 - 1 to 7 - 38
7.1 Online Module Change Conditions .................................................................................................. 7 - 2
7.2 Online Module Change Operations ................................................................................................. 7 - 3
7.3 Online Module Change Procedure .................................................................................................. 7 - 4
7.3.1 When industrial shipment setting is used and initial setting was made with
GX Configurator-AD ............................................................................................................... 7 - 5
7.3.2 When industrial shipment setting is used and initial setting was made with
sequence program................................................................................................................7-10

A- 11
7.3.3 When user range setting is used and initial setting was made with GX Configurator-AD
(other system is available).................................................................................................... 7 - 15
7.3.4 When user range setting is used and initial setting was made with GX Configurator-AD
(other system is unavailable)................................................................................................ 7 - 20
7.3.5 When user range setting is used and initial setting was made with sequence program
(other system is available).................................................................................................... 7 - 26
7.3.6 When user range setting is used and initial setting was made with sequence program
(other system is unavailable)................................................................................................ 7 - 31
7.4 Range Reference Table................................................................................................................. 7 - 37
7.5 Precautions for Online Module Change.........................................................................................7-38
8 TROUBLESHOOTING 8 - 1 to 8 - 8
8.1 Error Code List................................................................................................................................ 8 - 1
8.2 Troubleshooting ............................................................................................................................... 8 - 5
8.2.1 When the "RUN" LED is flashing or turned off ....................................................................... 8 - 5
8.2.2 When the "ERR." LED is on or flashing.................................................................................. 8 - 5
8.2.3 When the "ALM" LED is on or flashing ................................................................................... 8 - 5
8.2.4 When the digital output values cannot be read ...................................................................... 8 - 6
8.2.5 When A/D conversion completed flag does not turn ON during use in normal mode ............ 8 - 7
8.2.6 Checking the A/D converter module status using GX Developer system monitor.................. 8 - 7
APPENDIX App - 1 to App - 17
Appendix 1 Dedicated Instruction List and Available Devices..................................................................App- 1
Appendix 1.1G(P).OFFGAN .................................................................................................................App- 2
Appendix 1.2G(P).OGLOAD .................................................................................................................App- 4
Appendix 1.3G(P).OGSTOR.................................................................................................................App- 8
Appendix 2 Functions Added or Changed Due to Version Upgrade ......................................................App- 13
Appendix 3 External Dimensions............................................................................................................App- 17
INDEX Index - 1 to Index - 2

A- 12
MANUALS
The manuals related to this product are listed below.
Please place an order as needed.
Relevant Manuals
Remark
Printed manuals are available separately. Please place an order with the manual
number (model code) in the table above.
COMPLIANCE WITH THE EMC, LOW VOLTAGE, AND MACHINERY DIRECTIVES
(1) Method of ensuring compliance
To ensure that Mitsubishi Electric programmable controllers maintain EMC and Low
Voltage Directives when incorporated into other machinery or equipment, certain
measures may be necessary. Please refer to one of the following manuals.
• QCPU User's Manual (Hardware Design, Maintenance and Inspection)
• Safety Guidelines (This manual is included with the CPU module or head mod-
ule.)
The CE mark on the side of the programmable controller indicates compliance with
EMC and Low Voltage Directives.
(2) Additional measures
No additional measures are necessary for the compliance of this product with EMC
and Low Voltage Directives.
Manual name Manual number
(model code)
GX Developer Version 8 Operating Manual
Operating methods of GX Developer, such as programming, printing, monitoring, and debugging
(Sold separately)
SH-080373E
(13JU41)
GX Developer Version 8 Operating Manual (Function Block)
Operating methods of GX Developer, such as creating and printing function blocks (Sold separately)
SH-080376E
(13JU44)
GX Works2 Version1 Operating Manual (Common)
System configuration, parameter settings, and online operations (common to Simple project and Structured
project) of GX Works2 (Sold separately)
SH-080779ENG
(13JU63)
GX Works2 Version1 Operating Manual (Intelligent Function Module)
Operating methods of the intelligent function module of GX Works2, such as parameter settings, monitoring,
and predefined protocol support function (Sold separately)
SH-080921ENG
(13JU69)

A- 13
GENERIC TERMS AND ABBREVIATIONS
Unless otherwise specified, this manual uses the following general terms and
abbreviations.
General term/Abbreviation Description
A/D converter module A generic term for the Q68AD-G and Q66AD-DG
DOS/V personal computer An IBM PC/AT or compatible computer with DOS/V
GX Developer The product name of the software package for the MLSEC programmable controllers
GX Works2
GX Configurator-AD The abbreviation for the analog-digital converter module setting and monitor tool GX Configura-
tor-AD (SW2D5C-QADU-E)
QCPU (Q mode)
A generic term for the Q00JCPU, Q00CPU, Q01CPU, Q02CPU, Q02HCPU, Q06HCPU, Q12HCPU,
Q25HCPU, Q02PHCPU, Q06PHCPU, Q12PHCPU, Q25PHCPU, Q12PRHCPU, Q25PRHCPU,
Q00UJCPU, Q00UCPU, Q01UCPU, Q02UCPU, Q03UDCPU, Q04UDHCPU, Q06UDHCPU,
Q10UDHCPU, Q13UDHCPU, Q20UDHCPU, Q26UDHCPU, Q03UDVCPU, Q04UDVCPU,
Q06UDVCPU, Q13UDVCPU, Q26UDVCPU, Q03UDECPU, Q04UDEHCPU, Q06UDEHCPU,
Q10UDEHCPU, Q13UDEHCPU, Q20UDEHCPU, Q26UDEHCPU, Q50UDEHCPU, and
Q100UDEHCPU.
Process CPU A generic term for the Q02PHCPU, Q06PHCPU, Q12PHCPU and Q25PHCPU
Redundant CPU Generic term for Q12PRHCPU and Q25PRHCPU.
Personal computer A generic term for DOS/V personal computers
Industrial shipment setting A generic term for analog input ranges 0 to 10V, 0 to 5V, 1 to 5V, -10 to 10V, 0 to 20mA, and 4 to
20mA
FB The abbreviation for function block

A- 14
PACKING LIST
The product package contains the following.
Model Product Quantity
Q68AD-G Type Q68AD-G Channel Isolated Analog-Digital Converter Module 1
Q66AD-DG
Type Q66AD-DG Channel Isolated Analog-Digital Converter Module (with Signal
Conditioning Function) 1
FG terminal L-Shaped metal fitting 1
SW2D5C-QADU-E GX Configurator-AD Version 2 (1-license product)(CD-ROM) 1
SW2D5C-QADU-EA GX Configurator-AD Version 2 (Multiple-license product)(CD-ROM) 1

1OVERVIEW
1.1 Features
1- 1
1
OVERVIEW
2
SYSTEM CONFIGURATION
3
SPECIFICATIONS
4
SETUP AND PROCEDURES BEFORE OPERATION
5
UTILITY PACKAGE (GX CONFIGURATOR- AD)
6
PROGRAMMING
7
ONLINE MODULE CHANGE
8
TROUBLESHOOTING
1 OVERVIEW
This User's Manual describes the specifications, handling and programming methods for
the type Q68AD-G channel isolated analog-digital converter module (hereinafter referred
to as the Q68AD-G) and type Q66AD-DG channel isolated analog-digital converter
module (with signal conditioning function) (hereinafter referred to as the Q66AD-DG),
which are used with the MELSEC-Q series CPU modules.
The Q66AD-DG is exclusively used for current input.
In this manual, the Q68AD-G and Q66AD-DG are collectively referred to as the A/D
converter modules.
1.1 Features
(1) Channel isolated
The channels are isolated.
The Q66AD-DG is also isolated between the external power supply and channels.
(2) Multi-channel analog input is available.
(a) By using a single Q68AD-G, analog voltage or current inputs of 8 channels are
available.
(b) A single Q66AD-DG allows connection of 2-wire transmitters of 6 channels.
It has an input range for analog current, in addition to connections to 2-wire
transmitters.
(3) Power supply to 2-wire transmitter (Q66AD-DG only)
Supplying power to the 2-wire transmitter, the Q66AD-DG does not require the power
supply for the 2-wire transmitter.
Supply power can be switched ON/OFF channel-by-channel by the A/D conversion
enable/disable setting.
(4) Module protection provided by short-circuit protection circuit
(Q66AD-DG only)
If an excessive current flows into the module due to a short circuit of the wiring, the
short-circuit protection circuit limits the current to within 25 to 35mA, protecting the
module.
(5) Analog input check by check terminals (Q66AD-DG only)
Measurement of a voltage at the check terminals allows the mA of the 2-wire
transmitter output to be checked without the wiring being disconnected.

1- 2 1.1 Features
1OVERVIEW
(6) High accuracy
The reference accuracy *1 is as high as ±0.1% and the temperature coefficient*2 is as high
as ±71.4ppm/°C.
*1 Accuracy of offset/gain setting at ambient temperature
*2 Accuracy per temperature change of 1°C
(7) Changing the input range
The input range*3 can easily be set from the GX Developer.
*3 Input range refers to the type of offset/gain settings. The most frequently used range is set as the
default but the user can also set the offset/gain.
(8) A/D conversion system*1
There are the following five A/D conversion systems.
(a) Sampling processing
Analog input values are converted into digital values one by one on a channel
basis and the digital output value is output at every conversion.
(b) Averaging processing
1) Time averaging
A/D conversion is averaged in terms of time on a channel basis and a digital
average value is output.
2) Count averaging
A/D conversion is averaged in terms of count on a channel basis and a digital
average value is output.
3) Move averaging
The specified number of digital output values measured per sampling time are
averaged.
(c) Primary delay filter
A digital output value is smoothed according to the preset time constant.
*1 Refer to Section 3.2.1 for the details of the A/D conversion system.
(9) Input signal error detection function
The voltage/current outside the setting range is detected.
(10)Warning output*1
There are the following two warning outputs.
(a) Process alarm
A warning is output if a digital output value falls outside the setting range.
(b) Rate alarm
A warning is output if the varying rate of a digital output value falls outside the
preset varying rate range.
*1 Refer to Section 3.2.4 for details on warning output.
Example) Accuracy when the temperature varies from 25 to 30°C
0.1% (reference accuracy) + 0.00714 %/°C (temperature coefficient) 5°C
(temperature variation difference) = 0.1357%

1OVERVIEW
1.1 Features
1- 3
1
OVERVIEW
2
SYSTEM CONFIGURATION
3
SPECIFICATIONS
4
SETUP AND PROCEDURES BEFORE OPERATION
5
UTILITY PACKAGE (GX CONFIGURATOR- AD)
6
PROGRAMMING
7
ONLINE MODULE CHANGE
8
TROUBLESHOOTING
(11)Scaling function
A/D conversion values can be converted to percentage values (%) in the preset range
and be loaded into the buffer memory. This function can reduce the time required for
programming. (Refer to Section 3.2.6.)
(12)Online module change
Furthermore, the following operations can be processed by using sequence pro-
grams. (Note that these operations are possible for the modules of the same model
only.) (Refer to Chapter7.)
• Transferring the offset/gain set values to the replacement A/D converter module
• Transferring the offset/and gain set values to another A/D converter module
mounted on the other slot
(13)Offset/gain setting
GX Configurator-AD, dedicated instruction (G(P).OFFGAN) or mode switching setting
allows a shift to the offset/gain setting mode easily.
(14)Easy settings using GX Configurator-AD
Using GX Configurator-AD which is sold separately, sequence programs can be
reduced since settings of the A/D converter module can be made on the window.
Also, the set status or operating status of the module can be checked easily.
A FB*1 can be created automatically from the set intelligent function module parame-
ter, and can be used in sequence programs.
*1 FB is the function for making a circuit block used in a sequence program repeatedly a part (FB) to
use it in the sequence program.
This function can improve the efficiency of program development and minimize program bugs to
improve program qualities.
For the details of FB, refer to "GX Developer Version 8 Operating Manual (Function
Block)."

2- 1 2.1 Applicable Systems
2SYSTEM CONFIGURATION
2 SYSTEM CONFIGURATION
This chapter explains the system configuration of the A/D converter module.
2.1 Applicable Systems
This section describes the applicable systems.
(1) Applicable modules and base units, and No. of modules
(a) When mounted with a CPU module
For the CPU modules, the number of modules, and base units applicable to the A/
D converter module, refer to the following.
• User's Manual (Hardware Design, Maintenance and Inspection) for the CPU
module used
Remark
To use the A/D converter module with a C Controller module, refer to the user's
manual for the C Controller module.
(b) Mounting to a MELSECNET/H remote I/O station
For the number of modules and base units applicable to the A/D converter mod-
ule, refer to the following.
• Q Corresponding MELSECNET/H Network System Reference Manual
(Remote I/O network)
(2) Support of the multiple CPU system
When using the A/D converter in a multiple CPU system, refer to the following manual
first.
• QCPU User's Manual (Multiple CPU System)
(a) Applicable A/D converter module
The A/D converter module is of the function version C from the first product, and
applicable to a multiple CPU system.
(b) Intelligent function module parameters
Write intelligent function module parameters to only the control CPU of the A/D
converter module.
(3) Compatibility with online module change
The A/D converter module is of the function version C from the first product, and
online module change is possible.
For the procedure of online module change, refer to Chapter7.