Mitsubishi QJ71MT91 User manual

MODBUSR/TCP
Interface Module
User’s Manual
(Hardware)
QJ71MT91
Thank you for purchasing the Mitsubishi programmable controller
MELSEC-Q Series.
Prior to use, please read both this and the detailed manual
thoroughly and familiarize yourself with the product.
MODEL QJ71MT91-U-HW-JE
MODEL
CODE 13JP52
IB(NA)-0800280-C(0808)MEE
2004 MITSUBISHI ELECTRIC CORPORATION

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zSAFETY PRECAUTIONS z
(Always read these instructions before using this product.)
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 provided here are limited to those for the installation of this
product and wiring to the other devices only. For the safety instructions of the
programmable controller system, please read the user's manual of the CPU
module to use.
In this manual, the safety instructions are ranked as "DANGER" and "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.
[Design Precautions]
DANGER
zWhen connecting a peripheral device to the CPU module or connecting a
personal computer or the like to the intelligent function module / special
function module to exercise control (data change) on the running
programmable controller, configure up an interlock circuit in the sequence
program to ensure that the whole system will always operate safely.
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 external device, 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 the external
device and programmable controller CPU.
DANGER
CAUTION

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[Design Precautions]
DANGER
zDo not write any data in the "system area (Use prohibited)" of the buffer
memory of the intelligent function module. Also, do not output (turn on) the
"use prohibited" signal, which is one of the output signals from the
programmable controller CPU to the intelligent function module. If data is
written to the "system area (Use prohibited)" or the "use prohibited" signal is
output, there is a risk that the programmable controller system may
malfunction.
CAUTION
zDo 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 100 mm (3.94 inch) or more from each other.
Not doing so could result in noise that would cause erroneous operation.
[Installation Precautions]
DANGER
zUse the programmable controller in the operating environment that meets
the general specifications described 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.
zWhile 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.
zTighten 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.
zDo not directly touch the module's conductive parts or electronic
components.
Touching the conductive parts could cause an operation failure or give
damage to the module.
CAUTION
zCompletely 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.

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[Wiring Precautions]
CAUTION
zCompletely turn off the externally supplied power used in the system when
placing wiring.
Not completely turning off all power could result in electric shock or damage
to the product.
zExternal 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.
zSecurely connect the connector to the module.
zMake sure to place the communication and power cables to be connected to
the module in a duct or fasten them using a clamp. If the cables are not
placed in a duct or fastened with a clamp, their positions may be unstable or
moved, and they may be pulled inadvertently.
This may damage the module and the cables or cause the module to
malfunction because of faulty cable connections.
zWire the module correctly after confirming the type of the connected
interface. If the cable is connected to a different interface or wired
incorrectly, it may cause a fire or breakdown.
zWhen disconnecting the communication and power cables from the module,
do not pull the cables by hand. When disconnecting a cable with a
connector, hold the connector to the module by hand and pull it out to
remove the cable. If the cable is pulled while being connected to the module,
it may damage the module and/or cable or make cable contact improper,
causing a malfunction.
zBe sure there are no foreign substances such as sawdust or wiring debris
inside the module.
Such debris could cause fires, damage, or erroneous operation.
zThe 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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Revisions
* The manual number is noted at the lower right of the cover.
Print Date *Manual Number Revision
Jan., 2004 IB(NA)-0800280-A First printing
Mar., 2004 IB(NA)-0800280-B
Partial correction
Section 3.1
Aug., 2008 IB(NA)-0800280-C
Change of a term
"PLC" was changed to "programmable
controller"
Partial correction
SAFETY PRECAUTIONS, Conformation
to the EMC Directive and Low Voltage
Instruction, Chapter 2, Section 3.1,
Chapter 5,6
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.
2004 MITSUBISHI ELECTRIC CORPORATION

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CONTENTS
1. Overview........................................................................................................ 1
2. Performance Specifications ........................................................................... 1
3. Mounting and Installation ............................................................................... 3
3.1 Handling Precautions ............................................................................... 3
3.2 Installation Environment ........................................................................... 3
4. Part Names.................................................................................................... 3
5. Connection to Ethernet .................................................................................. 5
6. Setting from GX Developer ............................................................................ 6
7. External Dimensions...................................................................................... 8
About Manual
The following manual is also related to this product.
In necessary, order it by quoting the details in the table below.
Related Manual
Manual name Manual No.
(Model code)
MODBUS /TCP Interface Module User's Manual SH-080446ENG
(13JR71)
Before using this module, be sure to read the MODBUS /TCP Interface Module
User's Manual.

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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
Note the following when making this product to conform to the EMC and
Low Voltage directives.
(a) Twisted pair cable
Use shielded twisted pair cables for connecting to the
10BASE-T/100BASE-TX connectors. For the shielded twisted pair
cables, strip a part of the outer cover and ground the exposed shield
section on the widest contact surface as shown below.
Shielded twisted pair cable
Shield
Refer to (b) for grounding of the shield.
(b) Grounding of shield of shielded cable
(1) Ground the shield of the shielded cable as close to the module as
possible to avoid the electromagnetic induction from ungrounded
cables.
(2) Take an appropriate measure so that the stripped shield section can
be grounded to the control panel in the largest area as possible. A
clamp may be used as shown below. In this case, however, mask
the contact part when painting the inner surface of the control panel
to allow it to contact with the clamp.
Shield section
Screw
Clamp
Shielded cable
Paint mask
Note) Grounding by soldering a wire onto the shield section of the shielded
cable as shown below is not recommended. The high frequency
impedance will increase and the shield will be ineffective.
Shielded cable
Wire
Crimp terminal

1
1. Overview
This manual explains how to install the QJ71MT91 MODBUS /TCP Interface
Module (hereinafter referred to as QJ71MT91) and how to wire it to other devices.
MODBUS is a registered trademark of Schneider Electric SA.
(Product Configuration)
Model Item name Quantity
QJ71MT91 QJ71MT91 MODBUS /TCP interface module 1
2. Performance Specifications
The following describes the performance specifications of the QJ71MT91.
For the general specifications of the QJ71MT91, refer to the user's manual of the
CPU module used.
Specifications
Item 10BASE-T 100BASE-TX
Data transmission rate 10Mbps 100Mbps
Transmission method Base band
Maximum node-to-node distance 200m (656.16ft.)
Maximum segment length 1 100m (328.08ft.)
Number of cascade connection stages Max. 4 stages Max. 2 stages
Maximum number of connections 2 64 connections
Number of routers that can be set 1 default router + any 8 routers
Cable
Cable compliant
with the IEEE802.3
10BASE-T Standard
(unshielded twisted
pair cable (UTP
cable), Category 3
(4, 5))
Cable compliant
with the IEEE802.3
100BASE-TX
Standard (shielded
twisted pair cable
(STP cable),
Category 5)
Transmission
specifications
Connector applicable for external wiring RJ45
Number of slaves 3 64 slaves
Function (for send) 7 functions
Input area size 4k words
Automatic
communica-
tion function Output area size 4k words
Number of instructions
that can be executed
concurrently 4
Up to 8 instructions
Function (for send) MBRW instruction: 9 functions
MBREQ instruction: 19 functions
Input area size Max. 253 bytes per instruction
Master
function
Dedicated
instruction
Output area size Max. 253 bytes per instruction
1: Length between a hub and a node.
2: Indicates the number of TCP connections that can be established simultaneously.
3: Indicates the maximum number of slaves that can be communication targets.
4: Indicates the maximum number of dedicated instructions that can be started
simultaneously from a sequence program.

2
Specifications
Item 10BASE-T 100BASE-TX
Automatic
response
function
Function (for receive) 12 functions
Coil 64k points
Input 64k points
Input register 64k points
Holding register 64k points
MODBUS R
device size
Extended file register Max. 4086k points
Slave
function
No. of simultaneously acceptable
request messages 64
GX
Developer
connection
function
Number of simultaneously connectable
GX Developers Max. 8 GX Developers
Number of occupied I/O points 32 points
5VDC internal current consumption 0.52A
External dimensions 98 (3.86 in.)(H) 27.4 (1.08 in.)(W)
90 (3.54 in.)(D) [mm]
Weight 0.11kg

3
3. Mounting and Installation
3.1 Handling Precautions
(1) Since the case of the QJ71MT91 is made of resin, do not drop or give it
hard impact.
(2) 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.
(3) Tighten the screws such as module fixing screws within the following range.
Screw location Tightening torque range
Module fixing screw
(normally not required) (M3 screw) ( 1) 0.36 to 0.48N m
1: The module can be easily fixed onto the base unit using the hook at the top of the module.
However, it is recommended to secure the module with the module fixing screw if the
module is subject to significant vibration.
3.2 Installation Environment
Refer to the user's manual of the CPU module used.
4. Part Names
This section indicates the names of the QJ71MT91 parts.
QJ71MT91
10BASE-T/100BASE-TX
RUN
INIT.
OPEN
SD RD
COM.ERR.
ERR.
QJ71MT91
100M
1)
2)

4
Name Description
1) Indicator LEDs Refer to the following section, (1) Indications of
indicator LEDs.
2) 10BASE/T/100BASE-TX
connector (RJ45) 1
Connector for connection of the QJ71MT91 to
10BASE-T/100BASE-TX.
(The QJ71MT91 detects whether 10BASE-T or
100BASE-TX is used according to the hub.)
1: The LED on the connector is not lit.
(1) Indications of indicator LEDs
QJ71MT91
ERR.
COM.ERR.
RDSD
OPEN
INIT.
RUN
100M
LED Name Indication ON OFF
RUN Operation status Normal Error
INIT. Initial processing
status
Normal completion of
basic parameter
setting
Basic parameter
setting in progress or
nonexistent
OPEN TCP connection open
status
Presence of open
TCP connection
Absence of open TCP
connection
SD Send status Data send in progress Data not yet sent
ERR. Setting error status Error Normal setting
COM.ERR. Communication error
status
Communication error
occurrence
Normal
communication in
progress
100M Transmission speed 100Mbps 10Mbps or not
connected
RD Receive status Data receive in
progress Data not yet received

5
5. Connection to Ethernet
This section explains how to connect the QJ71MT91 to 100BASE-TX or
10BASE-T network.
<Operation procedures>
1) Connect the twisted pair cable to
the hub.
2) Connect the twisted pair cable to
the QJ71MT91.
POINT
(1) Sufficient safety measures must be taken for 100BASE-TX or 10BASE-T
installation work.
Consult a specialist when connecting cable terminals or installing trunk line
cables, etc.
(2) The QJ71MT91 detects whether 10BASE-T or 100BASE-TX, and the full or
half duplex communication mode is used according to the hub.
For connection with the hub that does not support the auto negotiation
function, set the half duplex communication mode on the hub side.

6
6. Setting from GX Developer
In order to use the QJ71MT91, make the intelligent function module switch
setting from GX Developer.
Switch No. Description Initial value Reference
Switch 1 Operation mode setting 0000H(1) in this section
Switch 2 Communication condition setting 0000H(2) in this section
Switch 3 IP address setting (high order) C001H
Switch 4 IP address setting (low order) 00FEH(3) in this section
Switch 5 No setting (blank). - -
(1) Operation mode setting (Switch 1)
Set the operation mode of the QJ71MT91, such as the online or offline
mode.
Set value Item Description
0000HOnline Normal operation mode. Communicates
with the target device.
0001HOffline
Disconnects the local station from the
network.
In the offline mode, parameter setting
cannot be executed. Communication with
the other station is not available, either.
000DHHardware test
Tests the RAM and ROM of the
QJ71MT91.
000EHSelf-loopback
test
Checks the hardware including the
send/receive circuits of the QJ71MT91
: A switch 1 error (error code: 7301H) will occur if the set value is other than the
value indicated in the table.
If the switch error has occurred, correct the switch setting and then switch the
power OFF and ON or reset the programmable controller CPU.

7
(2) Communication condition setting (Switch 2)
Specify the starting methods, the send frame, and the online change
enable/disable setting.
0: Start with the default
parameters.
1: Start with the user-set
parameters. 2
b15 b0b1b2
0: Start with the default
parameters.
1: Start with the user-set
parameters.
Online change enable/disable
setting
0: Online change disabled
1: Online change enabled
<Switch 2>
b3
Send frame specification
1:
0:
b4
R
Specify 0.
: The information in this area is ignored.
MODBUS device assignment
parameter starting method
Data are sent in the Ethernet
(V2.0) -compliant frame.
Data are sent in the
IEEE802.3 -compliant frame.
However, if the setting in this area is other than 0, a switch 2 error (error code:
7302H) occurs. If the switch error has occurred, correct the switch setting and then
switch the power OFF then ON or reset the programmable controller CPU.
When setting parameters by GX Configurator-MB, set 1 to both b0 and b1.
1
2
2
Basic parameter starting method
1
(3) IP address setting (Switch 3, Switch 4)
Set the IP address of the QJ71MT91 on the local station.
b0
<Switch 3>
b15 b7b8 b0b15 b7b8
IP address : 192. 1. 0. 254
<Switch 4>
: Set the value that satisfies the following conditions.
Condition 1: The IP address class is any of A, B and C.
Condition 2: All the host address bits are not "0" or "1".
If the conditions are not satisfied, a switch 3.4 error (7303H) will occur.
In such a case, correct the switch setting and then switch the power OFF
then ON or reset the programmable controller CPU.

8
7. External Dimensions
(Unit: mm (in.))
27.4 (1.08)
90 (3.54)
98 (3.86)
Ethernet is a trademark of Xerox Corporation.
MODBUS is a registered trademark of Schneider Electric SA.
All other company names and product names used in this manual are
trademarks or registered trademarks of their respective companies.

Warranty
Mitsubishi will not be held liable for damage caused by factors found not to be the cause of
Mitsubishi; machine damage or lost profits caused by faults in the Mitsubishi products;
damage, secondary damage, accident compensation caused by special factors unpredictable
by Mitsubishi; damages to products other than Mitsubishi products; and to other duties.
For safe use
yThis product has been manufactured as a general-purpose part for general industries, and
has not been designed or manufactured to be incorporated in a device or system used in
purposes related to human life.
yBefore using the product for special purposes such as nuclear power, electric power,
aerospace, medicine or passenger movement vehicles, consult with Mitsubishi.
yThis product has been manufactured under strict quality control. However, when installing
the product where major accidents or losses could occur if the product fails, install
appropriate backup or failsafe functions in the system.
U.S.A Mitsubishi Electric Automation Inc.
500 Corporate Woods Parkway Vernon
Hills, IL 60061, U.S.A.
Tel : [phone]
Brazil MELCO-TEC Rep. Com.e Assessoria
Tecnica Ltda.
Rua Correia Dias, 184,
Edificio Paraiso Trade Center-8 andar
Paraiso, Sao Paulo, SP Brazil
Tel : [phone]
Germany Mitsubishi Electric Europe B.V. German
Branch
Gothaer Strasse 8 D-40880 Ratingen,
GERMANY
Tel : [phone]
U.K Mitsubishi Electric Europe B.V. UK
Branch
Travellers Lane, Hatfield, Hertfordshire.,
AL10 8XB, U.K.
Tel : [phone]
Italy Mitsubishi Electric Europe B.V. Italian
Branch
Centro Dir. Colleoni, Pal. Perseo-Ingr.2
Via Paracelso 12, I-20041 Agrate Brianza.,
Milano, Italy
Tel : [phone]
Spain Mitsubishi Electric Europe B.V. Spanish
Branch
Carretera de Rubi 76-80,
E-08190 Sant Cugat del Valles,
Barcelona, Spain
Tel : [phone]
France Mitsubishi Electric Europe B.V. French
Branch
25, Boulevard des Bouvets, F-92741
Nanterre Cedex, France
TEL: [phone]
South Africa Circuit Breaker Industries Ltd.
Private Bag 2016, ZA-1600 Isando,
South Africa
Tel : [phone]
Hong Kong Mitsubishi Electric Automation
(Hong Kong) Ltd.
10th Floor, Manulife Tower, 169 Electric
Road, North Point, Hong Kong
Tel : [phone]
China Mitsubishi Electric Automation
(Shanghai) Ltd.
4/F Zhi Fu Plazz, No.80 Xin Chang Road,
Shanghai 200003, China
Tel : [phone]
Taiwan Setsuyo Enterprise Co., Ltd.
6F No.105 Wu-Kung 3rd.Rd, Wu-Ku
Hsiang, Taipei Hsine, Taiwan
Tel : [phone]
Korea Mitsubishi Electric Automation Korea
Co., Ltd.
1480-6, Gayang-dong, Gangseo-ku
Seoul 157-200, Korea
Tel : [phone]
Singapore Mitsubishi Electric Asia Pte, Ltd.
307 Alexandra Road #05-01/02,
Mitsubishi Electric Building,
Singapore 159943
Tel : [phone]
Thailand Mitsubishi Electric Automation (Thailand)
Co., Ltd.
Bang-Chan Industrial Estate No.111
Moo 4, Serithai Rd, T.Kannayao,
A.Kannayao, Bangkok 10230 Thailand
Tel : [phone]
Indonesia P.T. Autoteknindo Sumber Makmur
Muara Karang Selatan, Block A/Utara
No.1 Kav. No.11 Kawasan Industri
Pergudangan Jakarta - Utara 14440,
P.O.Box 5045 Jakarta, 11050 Indonesia
Tel : [phone]
India Messung Systems Pvt, Ltd.
Electronic Sadan NO:III Unit No15,
M.I.D.C Bhosari, Pune-411026, India
Tel : [phone]
Australia Mitsubishi Electric Australia Pty. Ltd.
348 Victoria Road, Rydalmere,
N.S.W 2116, Australia
Tel : [phone]
Country/Region Sales office/Tel
When exported from Japan, this manual does not require application to the Ministry
of Economy, Trade and Industry for service transaction permission.
Specifications subject to change without notice.
Printed in Japan on recycled paper.
HEAD OFFICE : TOKYO BUILDING, 2-7-3 MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
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