Mitsubishi MELSEC-A AJ71DN91 User manual

Model AJ71DN91/A1SJ71DN91
DeviceNet Master Module
User’s Manual
(Hardware)
Thank you for buying the Mitsubishi general-purpose programmable
controller MELSEC-A Series
Prior to use, please read both this manual and detailed manual
thoroughly and familiarize yourself with the product.
MODEL AJ71DN91-U-H-E
MODEL
CODE 13JL68
IB (NA)-66867-D(1112) MEE
©1998 MITSUBISHI ELECTRIC CORPORATION
zSAFETY PRECAUTIONS z
(Always read before starting use)
Before using this product, read this manual and the relevant manuals introduced in this manual
carefully and handle the product correctly with full attention to safety.
The instructions given this manual are concerned with this product. Refer to the User’s Manual
of the CPU module in use for details on the safety instructions for the programmable logic
controller system.
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 PRECAUTIONS]
WARNING
zIf a communications error occurs to a DeviceNetwork, the station in such a
communications error will be in a state as follows:
(1) The master station (AJ71DN91, A1SJ71DN91) maintains input data which had been
received from the slave station before the error occurred.
(2) Whether or not the output signal of the slave station to be turned off or maintained is
determined by the specification of the slave station or by the parameter settings in the
master station.
By referring to communications states of the slave station, arrange an interlock circuit in a
sequential program and provide safety mechanism externally of the slave station in order
the system to operate safely.
CAUTION
zDo not bundle the control wires and communication cables with the main circuit or power
wires, or install them close to each other. They should be installed at least 100 mm (3.94
in.) away from each other. Failure to do so may generate noise that may cause
malfunctions.
[INSTALLATION PRECAUTIONS]
CAUTION
zUse the PLC in the operating environment that meets the general specifications given in
the user's manual of the CPU module. Using the PLC in any other operating environment
may cause an electric shock, fire or malfunction, or may damage or degrade 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.
If the module is not installed properly, it may cause the module to malfunction, fail or fall off.
Secure the module with screws especially when it is used in an environment where
constant vibrations or strong impact may be expected.
Be sure to tighten the screws using the specified torque. If the screws are loose, it may
cause the module to malfunction or fall off. If the screws are tightened excessively, it may
damage the screws and/or the module, and cause the module to malfunction or fall off.
zBefore mounting or dismounting the module, make sure to shut off all phases of the
external power supply. Failure to do so may damage the product.
zDo not directly touch the conducting parts and electronic parts of the module. This may
cause the module to malfunction or fail.
[WIRING PRECAUTIONS]
WARNING
zMake sure to shut off all the phases of the external power supply before starting installation
or wiring. Otherwise, the personnel may be subjected to an electric shock or the product to
a damage.
CAUTION
zAlways ground the FG terminal for the PLC. There is a risk of malfunction.
zTighten the terminal screws with the specified torque. If the terminal screws are loose, it
could result in short circuits or erroneous operation. Tightening the terminal screws too far
may cause damages to the screws or the module, resulting in fallout, short circuits, or
malfunction.

[WIRING PRECAUTIONS]
CAUTION
zMake sure that foreign materials such as chips or wire pieces may not be caught inside the module.
They could cause a fire, a malfunction, or an operation error.
zMake sure to place the communications and power supply cables connected to the module within a
duct or clamp them. Unless the cables are placed within a duct or clamped, the module or cables
could be broken by swinging or moving of the cables or unintentional pulling to cause an operation
error resulting from a contact error.
zDo not pull cables by holding them with a hand for removing the communications or power supply
cables that are connected to the module. To remove a cable having a connector, hold the connector
connected to the module with a hand. To remove a cable not having a connector, loosen the screws
fastening to connect the module. The cables being pulled while they are still connected to the module
could break the module or cables, or cause an operation error resulting from a contact error.
[SETUP AND MAINTENANCE PRECAUTIONS]
CAUTION
zDo not touch the terminals while the power is on. Doing so may cause malfunctions.
zMake sure to shut off all the phases of the power supply before starting to clean the module or
retighten the terminal screws. Otherwise, an operation error could occur.
If the screws are loose, it may cause the module to short-circuit, malfunction or fall off. If the screws
are tightened excessively, it may damage the screws and cause the module to short circuit,
malfunction or fall off.
zDo not disassemble or modify the module. Disassembling or modifying the module could cause a
failure, an operation error, an injury, or a fire.
zMake sure to shut off all the phases of the power supply externally before installing or removing the
module. Otherwise, the module could cause a failure or an operation error.
zBefore handling the module, always touch grounded metal, etc. to discharge static electricity from the
human body.
Failure to do so can cause the module to fail or malfunction.
[DISPOSAL PRECAUTIONS]
CAUTION
zTo dispose of this product, treat it as an industrial waste.

zCONDITIONS OF USE FOR THE PRODUCT z
(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;
yNuclear 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.
yRailway 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.
yAircraft 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.

About the Manuals
The following product are available for this equipment.
Refer to the table given below to choose suitable manuals.
Detailed Manual
Manual name Manual No.
(Model code)
Model AJ71DN91/A1SJ71DN91
DeviceNet Master Module User's Manual
SH-4004
(13JL69)
1. Introduction
This manual describes the specifications and part names of Model
AJ71DN91/A1SJ71DN91 DeviceNet Master Module (referred to as
AJ71DN91,A1SJ71DN91, or DN91, hereafter) which is used in combination with
MELSEC-A/QnA Series PLC CPU.
DN91 controls DeviceNet devices as the master station for DeviceNet. For specifications
of DeviceNet, see DeviceNet Specifications (Release 2.0) Volumes 1 and 2.
DeviceNet is a registered trademark of Open DeviceNet Vendor Association, Inc.

2. System Configuration
The table below lists installable PLC CPUs, applicable data link systems/network systems,
and the number of CPUs, with regard to DN91.
Number of installable CPUs
Installation location A1SJ71DN91 AJ71DN91
A0J2CPU
A0J2HCPU Not applicable
A1SCPU(S1)
A1SHCPU
A1SJCPU(S3)
A1SJHCPU
A1SCPUC24-R2
A2SCPU(S1)
A2SHCPU(S1)
A2USCPU(S1)
A2USHCPU-S1
A2ASCPU(S1/S30/S60)
Q2ASCPU(S1)
Q2ASHCPU(S1)
No limitations
A1CPU
A2CPU(S1)
A3CPU
A1NCPU
A2NCPU(S1)
A3NCPU
A3MCPU
A3HCPU
A2ACPU(S1)
A3ACPU
A2UCPU(S1)
A3UCPU
A4UCPU
Q2ACPU(S1)
Q3ACPU
Q4ACPU
PLC CPU
Q4ARCPU
Not applicable
No
limitations
Remote I/O station of MELSECNET
Remote I/O station of MELSECNET/B
Not
applicable
AJ72LP25
AJ72BR15
Data link and
network
Remote I/O
station of
MELSECNET/10 AJ72QLP25
AJ72QBR15
Not applicable No
limitations

3. Specifications
3.1 Performance specifications
The table below lists the performance specifications of DN91.The table below lists the
performance specifications of DN91.
Item Specifications
Node type Group 2 dedicated client
Station numbers which can be set 0 to 63
Number of connections which can be
generated
63 connections for I/O communications
63 connections for message communications
Transmitting 2048 points (256 bytes) *2
I/O
communications Receiving 2048 points (256 bytes) *2
Transmitting 240 bytes
Rate of communications data
Message
communications Receiving 240 bytes
Communications speed One speed can be selected from 125kbps, 250kbps, and 500kbps.
Maximum transmitting
distance of trunk line
Length of
drop line
Communications
speed Thick
Cables
Thick and
Thin
Cables
Thick and
thin cables
coexist
Maximum Total
125
kbaud 500m 156 m
250
kbaud 250m 78m
Communications specifications
Maximum cable length *1
500
kbaud 100m
100m See Section
3.1.1 6m
39m
Number of input/output
occupied points Special 32 points
Internal current consumption
(5V DC)(A) 0.24
Mass(kg) A1SJ71DN91: 0.23, AJ71DN91: 0.43
*1: The maximum cable length complies with that in the DeviceNet specification (Release 2.0) Volumes 1
and 2.
*2: Up to 255 bytes can be transferred per slave station.
3.1.1 Maximum Transmitting Distance when Thick and Thin Cables Coexist
The table below lists both the maximum transmitting distance when thick and thin cables
coexist.
Communications speed Maximum transmitting distance of trunk line when thick
and thin cables coexit
125kbaud Thick cable length+5×Thin cable length 500m
250kbaud Thick cable length+2.5×Thin cable length 250m
500kbaud Thick cable length+Thin cable length 100m

4. Part Names
4.1 Part Names
This section describes the part names of DN91.
AJ71DN91
AJ71DN91
RUN
L.RUN
MS
NS
RS-232-C
RS-232C connector
DeviceNet connector
DeviceNet
A1SJ71DN91
A1SJ71DN91
RUN
L.RUN
MS
NS
RS-232-C
DeviceNet
RS-232C connector
DeviceNet connector

4.1.1 LED Display and Its Details
The table below explains LED display and its details.
LED
name Color Details State of LED
Illuminating In normal operation
Module error detected
Power not supplied
Not
illuminating
Parameter being loaded
Module error detected
RUN Red Displaying
normal
operation
Flickering
Parameter being loaded
Illuminating In communications
Not
illuminating
Communications stopped
Flickering
(periodically)
Communications ready
L.RUN Red Displaying
communic
ations
state
Flickering
(random)
Communications parameter
error
Illuminating DeviceNet interface in normal
operation
Green
(top)
Displaying
module
state Flickering Parameter error
MS
Red
(bottom)
Displaying
module
state
Unused
Illuminating In on-line state and
communications possible with
slave station
Green
(top)
Displaying
network
state
Flickering In on-line state but
communications impossible
with slave station
Duplicated MAC ID error
AJ71DN91
RUN
L.RUN
MS
NS
A1SJ71DN91
RUN
L.RUN
MS
NS
NS
Red
(bottom)
Displaying
network
state
Illuminating
Bus off error occurred.
5. Handling Precautions
This section describes the cautions for handling the module.
(1) Do not drop or give a hard physical shock to the enclosure and terminal block of the
module as they are made of resin.
(2) Do not remove the printed circuit board from the enclosure for the module.
Removing it could cause a failure.
(3) When wiring, make sure that no foreign materials such as wire pieces may be caught
inside the module. Remove them if they are caught.
(4) Apply a torque as specified in the table below for tightening fitting or terminal screws
for the module.
Type of screw Tightening torque range
A1SJ71DN91 Module mounting screw (M4) 78 to 118 N ycm
DeviceNet Connector screw 35.3 to 48.0 N ycm
DeviceNet Connector wire screw 60.8 to 82.3 N ycm

6. Wiring
This section describes the communications cable and RS-232C cable.
6.1 Wiring Communications Cable
The DeviceNet connector of DN91 is configured as illustrated below, where a seal
corresponding to its cable color is adhered to the top surface of the connector.
V+ (Red)
CAN_H (White)
Shield (drain wire)
CAN_L (blue)
V- (black)
6.2 Wiring RS-232C Cable
The illustration below explains how to wire the RS-232C cable connecting DN91 with a
PC/AT personal computer.
Dsub female connector
for A(15)D530N15
(9 pins)
Dsub female connector
for PC/AT personal
computer (9 pins)
Signal
name
Pin
number
Pin
number
Signal
name
- 1 1 DCD
RD 2 2 RxD
SD 3 3 TxD
DTR 4 4 DTR
SG 5 5 GND
- 6 6 DSR
RS 7 7 RTS
CS 8 8 CTS
- 9 9 RI
(1) Applying shielded cables are recommended.
(2) indicates that no connection is needed but it is recommended to make a
connection to eliminate specific orientation.

7. Outside Dimensions
(1) AJ71DN91
AJ71DN91
RUN
L.RUN
MS
NS
RS-232-C
250
(9.84)
106
(4.17)
4.2
(0.17) 37.5
(1.48)
DeviceNet
Unit: mm (inch)

(2) A1SJ71DN91
A1SJ71DN91
RUN
L.RUN
MS
NS
RS-232-C
130
(5.12)
93.6
(3.69)
6.5
(0.26) 34.5 (1.36)
DeviceNet
Unit : mm (inch)

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.