Mitsubishi QD51-R24 User manual

A - 1 A - 1
•SAFETY PRECAUTIONS •
(Always read these instructions before using this equipment.)
Before using this product, please read this manual and the relevant manuals introduced in this manual
carefully and pay full attention to safety to handle the product correctly.
The instructions given in this manual are concerned with this product. For the safety instructions of the
programmable controller system, please read the CPU module user's manual.
In this manual, the safety precautions are ranked as "DANGER" and "CAUTION".
!DANGER
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 medium or slight personal injury or physical damage.
Note that the !CAUTION level may lead to a serious consequence according to the circumstances.
Always follow the instructions of both levels because they are important to personal safety.
Please save this manual to make it accessible when required and always forward it to the end user.
[Disposal Precautions]
!DANGER
•Please refer to the manual for each station concerning the operating status of each station when
communications errors occur in the station. There is danger of accidents due to wrong outputs
or wrong operations.
•When connecting a peripheral device to the CPU module or performing control of a
programmable controller which is being run through a BASIC program, configure an interlock
circuit in the sequence program so that the system overall is operating on the safe side at all
times. Also before exercising other control (program change, operating status change (status
control)) on the running programmable controller, read the manual carefully and fully confirm
safety. Especially for the above control on the remote programmable controller from, an
immediate action may not be taken for programmable controller trouble due to a data
communication fault. In addition to configuring up the interlock circuit in the sequence program,
corrective and other actions to be taken as a system for the occurrence of a data
communication fault should be predetermined between and programmable controller CPU.
•Do not write data to the "System Area" in the intelligent function module's buffer memory.
Also, do not turn ON the "Use Prohibited" output signals among the output signals from the
programmable controller CPU to the intelligent function module.
If data are written to the "System Area" or output in response to "Use Prohibited" signals, there
is danger that the programmable controller system will malfunction.

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[Disposal Precautions]
!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 (3.94 in.) or more away from
each other.
Not doing so could result in noise that would cause erroneous operation.
•If a BASIC program is registered in the flash ROM in the module, do not power OFF or reset the
programmable controller CPU at the station where the module is installed during registration.
If it is performed during registration, the data contents in the flash ROM will be erratic and it will
be necessary to reset the setting values, etc. in the buffer memory and register them again in
the flash ROM. It could also cause the module to break down or malfunction.
[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 could result in electric shock, fire, erroneous operation, 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.
Incorrect loading of the module can cause a malfunction, failure or drop.
When using the programmable controller in the environment of much vibration, tighten the
module with a screw.
•Tighten the screw in the specified torque range.
Undertightening can cause a drop, short circuit or malfunction.
Overtightening can cause a drop, short circuit or malfunction due to damage to the screw or
module.
•Completely turn off the externally supplied power used in the system before mounting or
removing the module.
Not doing so could result in damage to the product.
•Do not directly touch the conductive area or electronic components of the module.
Doing so may cause malfunction or failure in the module.

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[Wiring Precautions]
!CAUTION
•When turning on the power supply or operating the module after installation or wiring work, be
sure that the module's terminal covers are correctly attached. Not attaching the terminal cover
could result in electric shock.
•External connections shall be crimped or pressure welded with the specified tools, or correctly
soldered.
Imperfect connections could result in short circuit, fires, or erroneous operation.
•Securely insatll the connector to the module.
•Be sure to fix communication cables leading from the module by placing them in the duct or
clamping them.
Cables not placed in the duct or without clamping may hang or shift, allowing them to be
accidentally pulled, which may cause a module malfunction and cable damage.
•When connecting cables, be sure to do so correctly after confirming the type of interface you are
connecting to. If connection is made to a different interface or if wiring is faulty, it could cause
the module or external device to break down.
•Tighten the terminal screws with the specified torque.
If the terminal screws are loose, it could result in short circuits, fire, or erroneous operation.
Tightening the terminal screws too far may cause damages to the screws and/or the module,
resulting in fallout, short circuits, or malfunction.
•When disconnecting the communications cable or power cable that is connected to the module,
do not disconnect it by grasping the cable with your hand and pulling it.
Disconnect cables with connectors attached by taking hold of the connector at the connection
with the module and pulling the connector. For cables connected to a terminal block, remove the
cable after loosening the terminal block screws.
If the cable is pulled while it is connected to the module, it could cause malfunction or damage
the module or the cable.
•Be sure there are no foreign substances such as sawdust or wiring debris inside the module.
Such debris could cause fires, damage, or erroneous operation.
•The module has an ingress prevention label on its top to prevent foreign matter, such as wire
offcuts, from entering the module during wiring.
Do not peel this label during wiring.
Before starting system operation, be sure to peel this label because of heat dissipation.

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[Startup and Maintenance precautions]
!CAUTION
•Do not disassemble or modify the modules.
Doing so could cause trouble, erroneous operation, injury, or fire.
•Completely turn off the externally supplied power used in the system before mounting or
removing the module. Not doing so could result in damage to the product.
•Do not install/remove the module to/from the base unit, or the terminal block to/from the module
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 terminals while power is on.
Doing so could cause shock or erroneous operation.
•Switch off all phases of the externally supplied power used in the system when cleaning the
module or retightening the terminal or module fixing screws.
Not doing so could result in electric shock.
Undertightening of terminal screws can cause a short circuit or malfunction.
Overtightening of screws can cause damages to the screws and/or the module, resulting in
fallout, short circuits, or malfunction.
•Before touching the module, always touch grounded metal, etc. to discharge static electricity
from human body, etc.
Not doing so can cause the module to fail or malfunction.
[Operating Precautions]
!CAUTION
•When performing control (in particular, changing data, changing a program or changing the
operation status (status control)) of the programmable controller during operation using a BASIC
program, do so only after reading the user's manual thoroughly and taking adequate safety
precautions.
If there are errors when changing data, changing a program or in status control, it could result in
system malfunction, or cause mechanical damage or accidents.
[Disposal Precautions]
!CAUTION
•When disposing of this product, treat it as industrial waste.

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REVISIONS
The manual number is given on the bottom left of the back cover.
Print Date Manual Number Revision
Apr., 2000 SH(NA)-080089-A First printing
Sep., 2000 SH(NA)-080089-B Addition
Section 1.3, Section 2.3, 2.3.1, 2.3.2, 2.4
Dec., 2003 SH(NA)-080089-C Correction
Section 2.1, 6.2
Correction
SAFETY PRECAUTIONS, About Manuals, Conformation to the EMC
Directive and Low Voltage Instruction, About the Generic Terms and
Abbreviations, Chapter 1, Section 2.1, 2.3, 2.4, 2.5, Section 3.1, 3.2.1,
3.3.2(2), 3.8.1, Section5.1, 5.5.1
Term change
Before change After change
GPPW GX Developer
MELSECNET/10H MELSECNET/H
Oct., 2004 SH(NA)-080089-D
Feb., 2006 SH(NA)-080089-E Correction
SAFETY PRECAUTIONS, About Manuals, Conformation to the EMC
Directive and Low Voltage Instruction, How to read this manual, and
Configuration, Section 1.1 to 1.3, Section 2.1, 2.5, Section 3.1, 3.2.1,
3.3.1, 3.3.3, 3.4, 3.5, 3.5.1 to 3.5.7, 3.6 to 3.8, 3.8.1, 3.8.2, 3.9, 3.10,
3.10.1 to 3.10.3, 3.11, 3.11.1 to 3.11.4, 3.12.1, 3.13.1, 3.13.2,
Section 4.1, 4.2, 4.2.1, 4.2.2, 4.3, 4.3.2, 4.4.1, 4.4.5, 4.5, 4.5.3, 4.5.4,
4.8.2, Section 5.2 to 5.5, 5.5.2, 5.6.1, 5.6.2, Section 6.1, 6.2,
Appendix-1, Appendix-2, Appendix-2.1, Appendix-3
Deletion
Appendix-2.2 (incorporated into Appendix-2.1)
Oct.,2006 SH(NA)-080089-F Correction
SAFETY PRECAUTIONS, Section 2.1
Aug.,2008 SH(NA)-080089-G
Change of a term
"PLC" was changed to "programmable controller".
Correction
SAFETY PRECAUTIONS, Compliance with the EMC and Low Voltage
Directives, About The Generic Terms and Abbreviations, Section 1.2,
2.1, 2.3, 2.4, 2.6, 3.1 to 3.3, 5.1, 5.3 to 5.5, 5.6.2, 5.7, 6.2, Appendix-3
Japanese Manual Version SH-080092-H
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.
©2000 MITSUBISHI ELECTRIC CORPORATION

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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
CONTENTS....................................................................................................................................................A- 6
About Manuals ...............................................................................................................................................A- 9
Conformation to the EMC Directive and Low Voltage Instruction ................................................................A- 9
How to read this manual, and Configuration .................................................................................................A-10
About The Generic Terms and Abbreviations...............................................................................................A-11
Meaning of Terms and Their Contents..........................................................................................................A-13
Product Configuration ....................................................................................................................................A-13
1 OVERVIEW 1- 1 to 1- 9
1.1 Operation Overview for QD51 (-R24)..................................................................................................... 1- 2
1.2 Features of QD51 (-R24) ........................................................................................................................ 1- 4
1.3 About the Function Added/Changed to the Function Version B ........................................................... 1- 9
2 SYSTEM CONFIGURATION AND USABLE FUNCTIONS 2- 1 to 2-11
2.1 Application Systems................................................................................................................................ 2- 1
2.2 Combining the Opposite Party's Device and the Programmable controller CPU................................. 2- 4
2.3 For Use in Multiple CPU System ............................................................................................................ 2- 6
2.4 For Use with Redundant CPUs .............................................................................................................. 2- 7
2.5 For Use at MELSECNET/H Remote I/O Station.................................................................................... 2- 8
2.6 How to confirm the function version ....................................................................................................... 2-10
3 SPECIFICATIONS 3- 1 to 3-66
3.1 Performance Specifications .................................................................................................................... 3- 1
3.2 RS-232 Interface Specifications ............................................................................................................. 3- 3
3.2.1 RS-232 connector specifications ..................................................................................................... 3- 3
3.2.2 RS-232 cable specifications............................................................................................................. 3- 4
3.3 RS-422/485 Interface Specifications ...................................................................................................... 3- 5
3.3.1 RS-422/485 terminal block specifications ....................................................................................... 3- 5
3.3.2 RS-422/485 cable specifications ..................................................................................................... 3- 6
3.3.3 Cautions during data communications with a RS-422/485 line...................................................... 3- 7
3.4 List of Commands and Functions in AD51H-BASIC.............................................................................. 3-10
3.5 QD51 (-R24) Internal Memory ................................................................................................................ 3-16
3.5.1 Program area.................................................................................................................................... 3-18
3.5.2 Buffer memory.................................................................................................................................. 3-20
3.5.3 Common memory............................................................................................................................. 3-23
3.5.4 Expansion register (ED0 to ED1023) .............................................................................................. 3-26

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3.5.5 Special register (ED9000 to ED9127) ............................................................................................. 3-31
3.5.6 Expansion relay (EM0 to EM1023).................................................................................................. 3-35
3.5.7 Special relay (EM9000 to EM9127)................................................................................................. 3-38
3.6 Receive Buffer......................................................................................................................................... 3-41
3.7 List of GX Developer Setting Items for the QD51 (-R24)....................................................................... 3-42
3.8 List of Input/Output Signals From/To the Programmable controller CPU............................................. 3-43
3.8.1 Input (X) detailed explanation .......................................................................................................... 3-45
3.8.2 Output (Y) detailed explanation ....................................................................................................... 3-49
3.9 Relationship between the QD51 (-R24) Start Condition and the Flash ROM Execution
Program Area.......................................................................................................................................... 3-53
3.10 QD51 (-R24) Operation when the Power is Turned On ...................................................................... 3-54
3.10.1 In the case of the programming mode........................................................................................... 3-54
3.10.2 In the case of the multitask debug mode ...................................................................................... 3-55
3.10.3 In the case of the run mode ........................................................................................................... 3-56
3.11 Running a Task (a created program) ................................................................................................... 3-57
3.11.1 Conditions for permitting running of a task and start conditions................................................... 3-57
3.11.2 Starting by turning the power on or by reset (start condition: START) ........................................ 3-58
3.11.3 Starting by an interrupt from the programmable controller CPU (Start Condition: IT)................. 3-60
3.11.4 Starting by a start request from another task (Start condition: BOOT, ON)................................. 3-61
3.12 Running a BASIC Program by Multitask Processing........................................................................... 3-63
3.12.1 Multitask processing....................................................................................................................... 3-63
3.13 BASIC Program Priority Order (Priority)............................................................................................... 3-64
3.13.1 Synchronizing execution between BASIC programs (Event control) ........................................... 3-65
3.13.2 Sharing equipment (Resources) by multitasking .......................................................................... 3-66
4 ABOUT QD51 (-R24) FUNCTIONS 4- 1 to 4-24
4.1 List of Functions ...................................................................................................................................... 4- 1
4.2 Communications with a Console / Terminal........................................................................................... 4- 2
4.2.1 Communications with a console ...................................................................................................... 4- 3
4.2.2 Communications with a terminal...................................................................................................... 4- 6
4.3 Printing by a Printer................................................................................................................................. 4-10
4.3.1 Printing from a printer connected to an interface that is not set in the console ............................. 4-11
4.3.2 Printing from a printer connected to the console ............................................................................ 4-13
4.4 Communications with the External Device............................................................................................. 4-14
4.4.1 If data are being sent ....................................................................................................................... 4-14
4.4.2 If data are received........................................................................................................................... 4-15
4.5 Communications with the Programmable controller CPU ..................................................................... 4-16
4.5.1 ON/OFF data communications by general output (X/Y)................................................................. 4-17
4.5.2 Reading and writing data from/to buffer memory............................................................................ 4-18
4.5.3 Reading and writing data from/to the programmable controller CPU ............................................ 4-19
4.5.4 Reading and writing data from/to the programmable controller CPU's expansion file register..... 4-20
4.6 Reading and Writing Data from/to the Buffer Memory of Another Intelligent Function Module/
Special Function Module ........................................................................................................................ 4-21
4.7 Reading and Writing Clock Data ............................................................................................................ 4-22
4.8 Data Communications Between Tasks .................................................................................................. 4-23
4.8.1 ON/OFF data communications by expansion relay (EM) ............................................................... 4-23
4.8.2 Data communications by expansion register (ED).......................................................................... 4-24

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4.8.3 Data communications by common memory.................................................................................... 4-24
5 SETTINGS AND PROCEDURES UP UNTIL OPERATION 5- 1 to 5-17
5.1 Handling Precautions.............................................................................................................................. 5- 1
5.2 Settings and Procedures Up Until Operation ......................................................................................... 5- 2
5.3 Names of Parts and Functions ............................................................................................................... 5- 3
5.4 Connection with a Console, Debugger................................................................................................... 5- 4
5.5 Connection with the External Device...................................................................................................... 5- 5
5.5.1 Connecting to the RS-232 interface ................................................................................................ 5- 6
5.5.2 Connecting to the RS-422/485 interface ......................................................................................... 5- 8
5.6 Setting from the GX Developer............................................................................................................... 5-11
5.6.1 I/O assignment settings.................................................................................................................... 5-11
5.6.2 Switch setting for I/O and intelligent function module ..................................................................... 5-12
5.6.3 Intelligent function module interrupt point settings .......................................................................... 5-16
5.7 Maintenance, Checks ............................................................................................................................. 5-17
6 EXCLUSIVE COMMANDS 6- 1 to 6- 2
6.1 Exclusive Command List and Available Devices ................................................................................... 6- 1
6.2 Z(P). YCHECK ........................................................................................................................................ 6- 2
7 TROUBLESHOOTING 7- 1 to 7- 3
7.1 About QD51 (-R24) Status Checks ........................................................................................................ 7- 1
7.1.1 Checking the LED lighting status, communications error status and QD51 (-R24) switch
setting status .................................................................................................................................... 7- 1
7.1.2 Errors that occur in BASIC............................................................................................................... 7- 3
APPENDIX App- 1 to App- 7
Appendix-1 Comparison of Functions with Previous Modules ................................................................App- 1
Appendix-2 About Use of Programs from Previous Modules ..................................................................App- 2
Appendix 2.1 About use of A1SD51S, AD51H-S3 programs ..............................................................App- 2
Appendix-3 External Dimensions .............................................................................................................App- 6
INDEX Index- 1 to Index- 2

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About Manuals
The following manuals are also related to this product.
In necessary, order them by quoting the details in the tables below.
Related Manuals
Manual Name Manual No.
(Model Name Code)
AD51H-BASIC Programming Manual (Command)
(Corresponds to the QD51, QD51-R24, A1SD51S, AD51H-S3.)
Explains the commands, how to use the functions and the specifications of AD51H-BASIC.
(Sold separately)
SH-080090
(13JF63)
AD51H-BASIC Programming Manual (Debug and Compile)
(Corresponds to the QD51, QD51-R24, A1SD51S, AD51H-S3.)
Explains concerning debugging of AD51H-BASIC, multitasking settings, and compilation
methods.
(Sold separately)
SH-080091
(13JF64)
Compliance with the EMC and Low Voltage Directives
(1) For programmable controller system
To configure a system meeting the requirements of the EMC and Low Voltage
Directives when incorporating the Mitsubishi programmable controller (EMC and
Low Voltage Directives compliant) into other machinery or equipment, refer to
Chapter 9 "EMC AND LOW VOLTAGE DIRECTIVES" of the QCPU User's
Manual (Hardware Design, Maintenance and Inspection).
The CE mark, indicating compliance with the EMC and Low Voltage Directives, is
printed on the rating plate of the programmable controller.
(2) For the product
No additional measures are necessary for the compliance of this product with the
EMC and Low Voltage Directives.

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How to read this manual, and Configuration
How to use this manual
We will explain concerning the QD51 (-R24) for each purpose of use.
Use this manual for reference for the following contents.
(1) When desiring to know the features, functions and component
parts
(a) When desiring to know the features and functions
• The features of the QD51 (-R24) are described in Chapter 1.
• The common specifications and functions, etc. of the QD51 (-R24) are
described in Chapter 3.
(b) When desiring to know the package contents and system component parts
• The items included in the package when the QD51 (-R24) is purchased are
described in "Product Configuration" before Chapter 1.
• The user should procure parts and materials not included in the package
contents separately.
(2) When desiring to know the processing necessary to get the QD51
(-R24) started
(a) When desiring to know the startup procedure
• An abbreviated sequence of the procedures up to the point when the QD51
(-R24) is operated is described in section 5.2.
(b) When desiring to know about connections with the console debugger
• The connection method is described in section 5.4.
(c) When desiring to know about connection with the opposite party's device
• The connection method for each type of interface is described in section
5.5.
(d) When desiring to know the processing necessary before the QD51 (-R24) is
started up
• Setting of the parameters used in the QD51 (-R24) using GX Developer is
explained in section 5.6.
(3) When desiring to know about program application
When desiring to know about application of the program from the A1SD51S or
AD51H-S3
• Program application is described in section 2.1 of the Appendix.

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About the Generic Terms and Abbreviations
In this manual, unless specially clarified, explanation of the Intelligent
Communications Module using the general names and abbreviated names shown
below.
(1) Generic terms and Abbreviations of Affected Modules
In this manual, programmable controller CPUs, etc. related to the Intelligent
Communications Module are displayed with the following generic terms and
abbreviations. When it is necessary to clarify the relevant model name, the
affected module's model name is included.
Generic Term/Abbreviation Content of Generic terms and Abbreviations
ACPU AnNCPU, AnACPU, AnUCPU
AnACPU A2ACPU, A2ACPU-S1, A2ACPUP21/R21, A2ACPUP21/R21-S1, A3ACPU,
A3ACPUP21/R21
AnNCPU A1NCPU, A1NCPUP21/R21, A2NCPU, A2NCPU-S1, A2NCPUP21/R21,
A2NCPUP21/R21-S1, A3NCPU, A3NCPUP21/R21
AnUCPU A2UCPU, A2UCPU-S1, A2USCPU-S1, A2USHCPU-S1, A3UCPU, A4UCPU
AnA/AnU/QnACPU AnACPU, AnUCPU, QnACPU
AnU/QnACPU AnUCPU, QnACPU
QD51 Shows only the QD51.
QD51-R24 Shows only the QD51-R24.
QD51(-R24) Shows both the AD51 and QD51-R24.
QCPU
Q00JCPU, Q00CPU, Q01CPU, Q02CPU, Q02HCPU, Q06HCPU, Q12HCPU, Q25HCPU,
Q02PHCPU, Q06PHCPU, Q12PHCPU, Q25PHCPU, Q12PRHCPU, Q25PRHCPU,
Q02UCPU, Q03UDCPU, Q04UDHCPU, Q06UDHCPU, Q13UDHCPU, Q26UDHCPU,
Q03UDECPU, Q04UDEHCPU, Q06UDEHCPU, Q13UDEHCPU, Q26UDEHCPU
QCPU-A Q02CPU-A, Q02HCPU-A, Q06HCPU-A
QnACPU Q2ACPU, Q2ACPU-S1, Q2ASCPU, Q2ASCPU-S1, Q2ASHCPU, Q2ASHCPU-S1,
Q3ACPU, Q4ACPU, Q4ARCPU
Q/QnACPU QCPU, QnACPU

A - 12 A - 12
(2) Other Generic terms and Abbreviations
In this manual, intelligent communications module data communications devices,
etc. are explained using the following generic terms and abbreviations. When it is
necessary to indicate clearly what the object of the explanation is, the name /
model name of that item is included.
Generic Term/Abbreviation Content of Generic terms and Abbreviations
Opposite device (external
device)
Computer, display, measuring instrument, ID module, bar code reader, adjuster or
other intelligent communications module, UC 24, etc. connected to this intelligent
communications module for data communications.
Intelligent Function Module
Q series programmable controller module which runs according to commands from
the programmable controller CPU. (Equivalent to a special function module of the A
series programmable controller)
(Examples)
• CC-Link Interface Module
• A/D, D/A Conversion Module
• Ethernet Interface Module
• Serial Communications Module
Intelligent Function Module
Device
Buffer memory of the intelligent function module for storing data sent to and received
from the programmable controller CPU (setting values, monitor values, etc.).
Special Function Module
A/QnA series programmable controller modules operated by commands from the
programmable controller CPU. (Equivalent to Q series programmable controller
intelligent function modules.)
(Examples)
• CC-Link Interface Module
• A/D, D/A Conversion Module
• High Speed Counter Module
• Ethernet Interface Module
• Computer Link Module, Serial Communications Module
Buffer Memory Buffer memory of the intelligent function module for storing data sent to and received
from the programmable controller CPU (setting values, monitor values, etc.).
I/F Interface
CH Channel
GX Developer
Generic product name for SWnD5C-GPPW-E, SWnD5C-GPPW-EA, SWnD5C-
GPPW-EV, and SWnD5C-GPPW-EVA. ("n" means version 4 or later.)
"-A" and "-V" mean "volume license product" and "version-upgrade product"
respectively.
MELSECNET/10 MELSECNET/10 network system.
MELSECNET/H MELSECNET/H network system.
RS-232 (Interface) RS-232 compatible interface.
RS-422/485 (Interface) RS-422 and RS-485 compatible interface.
YCHECK Abbreviation for Z.YCHECK or ZP.YCHECK.
User's Manual (Hardware) or
Hardware Manual Q Corresponding Intelligent Communications Module User's Manual (Hardware)
Programming Manual
(Commands) or Command
Manual
AD51H-BASIC Programming Manual (Commands)
Programming Manual (Debug
and Compile) or Debug and
Compile Manual
AD51H-BASIC Programming Manual (Debug and Compile)

A - 13 A - 13
Meanings of Terms and Their Contents
The meanings of terms used in this manual and their contents are shown below.
Term Contents
Console
This is a device which connects to the QD51 (-R24) and is used to perform
programming and multitasking settings.
A PC/AT personal computer with the software package installed becomes a console.
Depending on the settings, the console becomes the debugger.
Debugger
This device connects to the QD51 (-R24) and performs debugging. A PC/AT personal
computer with the software package installed becomes the debugger. The debugger
can check variable values and can edit the program while it is being run.
Terminal This connects to the QD51 (–R24) and is used to display the screen and input
characters from the keyboard.
Interpreter This is BASIC in a format which processes while executing commands one by one.
Compiler
This compiles programs created with the interpreter. It registers the compiled files and
executes them. Compared to the interpreter, its execution speed is on the average 2
or 3 times faster.
Multitasking This executes multiple programs by time slicing, executing them so that it seems that
they are being executed simultaneously.
Run Mode
This is the mode used when the console is disconnected and the QD51 (-R24) is
being operated independently. It is actually used when this device is being run as a
system.
Programming Mode This mode is used to connect to the console and carry out programming.
Multitask Debug Mode This mode changes the contents of variables and traces them while executing a
program, and carries out tracing.
Product Configuration
The QD51 (-R24) product configuration is as shown below.
Model Name Product Name Quantity
QD51 Model QD51 Intelligent Communications Module 1
Model QD51-R24 Intelligent Communications Module 1
Terminal Resistor 330 Ω, 1/4 W (For RS-422 communications) 2
QD51-R24
Terminal Resistor 110 Ω, 1/2 W (For RS-485 communications) 2

1 - 1 1 - 1
MELSEC-Q
1 OVERVIEW
1
1 OVERVIEW
This manual explains the system configuration, performance specifications and
functions of the QD51 / QD51-R24 Intelligent Communications Module.
When applying the following program examples to the actual system, make sure to
examine the applicability and confirm that it will not cause system control problems.
The QD51 (-R24) has the following functions.
(1) BASIC Program-Based Functions
• Sub-CPU Function
Complex numerical calculations and functional calculations can be made with
a BASIC program.
• Monitor Display Function
It can display production conditions, the operating status, details of a
breakdown, etc.
• Key Input Function
The production schedule, production volume, operation, setting data, etc. can
be input.
• Printer Function
Production plans, performances, daily reports, breakdown details, planning
data, inspection results and test performance, etc. can be printed out.
• Data Input Function
Data can be input from a bar code reader or magnetic card reader, etc.
• External Device Connection Function
A computer, etc. can be connected to the RS-232, RS-422/485 interfaces and
data can be sent and received through a BASIC program.
• Clock Function
Clock data of the programmable controller CPU can be read and written.
(2) Offline Programming Function
BASIC programs can be created, corrected, stored to; user FD and printed out
independently by peripheral devices.
(3) Online Programming Function
BASIC programs can be created, run, and corrected from the console.
(4) Multitasking Debugging Function
BASIC programs can be debugged while they are being run.

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MELSEC-Q
1 OVERVIEW
1
1.1 Operation Overview for QD51 (-R24)
The QD51 (-R24) operates by BASIC programs created by the user.
The BASIC version that can be used by the QD51 (-R24) is AD51H-BASIC, which is
capable of multitasking processing of up to 2 tasks.
Besides the various calculations that can be carried out by a BASIC program created
by the user,
• Data can be sent to and received from an external device.
• Data can be sent to and received from the programmable controller CPU.
The operation in the QD51 (-R24) when data are sent to or received from an external
device or the programmable controller CPU is as shown below.
Sending
Expansion Relay
Expansion Register
Common Memory
Buffer Memory
Data
reading
Data writing
Internal Memory BASIC Program
Task No. 1 Area
Task No. 2 Area
Data
Writing
Data
reading
Interface 1
RS-232
External
Device
• Interrupt request
• Data writing
• Data reading
• Task start request
1 In the case of the QD51
RS-232 2 Channels
In the case of the QD51-R24
RS-232 1 Channel
RS-422/485 1 Channel
Reception
Data Sending
/Reception
RS-232
RS-422
RS-485
Programmable
controller

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MELSEC-Q
1 OVERVIEW
(1) Sending Data to and Receiving Data from an External Device
The QD51 (-R24) is equipped with the following interfaces.
• QD51 : 2 RS-232 channels
• QD51-R24 : 1 RS-232 channel, 1 RS-422/485 channel
Production instructions, production results and other data can be sent to or
received from a personal computer or other external device connected to the RS-
232 or RS-422/485 interface or the console non-procedurally.
Data such as production results can also be printed out on a printer connected to
the RS-232 interface.
(2) Sending Data to and Receiving Data from the Programmable
Controller CPU
Through the execution of programmable controller access commands
(PCRD/PCWT), the programmable controller CPU device data can be read and
written.
With the programmable controller access commands, data can also be written to
and read from the buffer memory of a special function module or an intelligent
function module.

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MELSEC-Q
1 OVERVIEW
1.2 Features of QD51 (-R24)
Systems which use the QD51 (-R24) have the features shown below.
(1) Simultaneous execution of up to two BASIC programs (tasks)
Since multitask processing is possible, BASIC programs can be created by
dividing the control tasks to be done by the QD51 (-R24).
The necessary task is started depending on the control level and the system can
be controlled while exchanging data and synchronizing executions between
tasks.
Controls
executed
in the QD51
Divided by
controltype
Task 1
Task 2
It is possible to create
3 or more BASIC programs.
However, a maximum of
2 tasks (BASIC programs)
can be run simultaneously.
(2) Data communications with external devices
<Data communications with external devices>
Non-procedural data communications can be carried out with external devices
connected to the RS-232 and RS-422/485 interfaces.
<Data communications with a console or terminal>
The following data communications can be performed with a console or terminal
connected to the RS232 or RS-422/485 interface.
• Data display to a console or terminal
• Data input to a console or terminal
<Printout on a Printer>
Data can be printed out on a printer connected to the RS-232 interface.
QD51 -R24
ERR.
P.RUN
SD
RD
RUN
PROG
SD
RD
CH. 1
CH.1 CH .2
CH. 2
External device
(printer)
Robot, bar code reader,
thermostat, etc.
PC/AT personal computer, etc.

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MELSEC-Q
1 OVERVIEW
(3) Data communications with the programmable controller are
possible
Data can be sent to or received from a programmable controller CPU installed
with the QD51(-R24) or the one on the MELSECNET/H or MELSECNET/10
network.
The types of data which can be sent to and received from a programmable
controller CPU are shown below.
1) Device writing and reading in the programmable controller CPU (Max. 960
words/1 time)
2) Writing to and reading from the buffer memory in the intelligent function
module (Max. 960 words/ 1 time).
3) Remote RUN/STOP of the programmable controller CPU.
4) Interrupts to the programmable controller CPU.
(4) File control is possible
Using the console's FD or HD (hard disk), sequential files and random files can
be handled.
However, it is necessary that the console be connected at all times.
<Sequential Files>
These are files in which data can be read and written sequentially and which
enable efficient use of memory.
They are used mainly for operating instruction data files and results files, etc.
<Random Files>
These are files where reading starts from the necessary portion only and only the
necessary portion is written.
This type of file is appropriate for large volume inventory files, instruction data for
operator interfaces, master files, etc.
When reading or writing is done one time, the maximum data size is 256 bytes.
(5) Offline programming with a text editor is possible
A BASIC program can be created offline using a text editor, and the BASIC
program can then be registered.
In offline programming, the edited program cannot be run.