Mitsubishi Electric A1SJ71DN91 User manual

A1SJ71DN91,
AJ71DN91
User’s manual
_______________________________________________________________________________________________________
SHNA 4004A

REVISIONS
*The manual number is given on the bottom left of the back cover.
Print Date *Manual Number Revision
Oct., 1998 SH (NA) -4004-A First edition
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.
© 1998 Mitsubishi Electric Corporation

••SAFETY PRECAUTIONS ••
(Read these precautions before using.)
When using Mitsubishi equipment, thoroughly read this manual and the associated manuals introduced in this manual.
Also pay careful attention to safety and handle the module properly.
These precautions apply only to Mitsubishi equipment. Refer to the CPU module user's manual for a description of the
PC system safety precautions.
These SAFETY PRECAUTIONS classify the safety precautions into two categories: "DANGER" and "CAUTION".
DANGER Procedures which may lead to a dangerous condition and cause death or serious injury if not
carried out properly.
CAUTION Procedures which may lead to a dangerous condition and cause superficial to medium injury,
or physical damage only, if not carried out properly.
Depending on circumstances, procedures indicated by CAUTION may also be linked to serious results.
In any case, it is important to follow the directions for usage.
Store this manual in a safe place so that you can take it out and read it whenever necessary.
Always forward it to the end user.
[System Design Precautions]
DANGER
•If a communication error occurs in the network of the DeviceNet, the communication error station enters the state
shown below.
(1) The master station (AJ71DN91, A1SJ71DN91) holds the data that was input from a slave station before the
occurrence of a communication error.
(2) Whether the output signal of the slave station goes OFF or is retained depends on the slave station
specifications or the parameter setting at the master station.
Create the interlock circuit on a sequence program which uses the communication state of the slave stations so that
the system operation is secured. At the same time, a safety system must be provided outside the slave station.
CAUTION
•Do not bundle control lines or communication wires together with main circuit or power lines, or lay them close to
these lines.
As a guide, separate these lines by a distance of at least 100 mm, otherwise malfunctions may occur due to noise.

[Cautions on Mounting]
CAUTION
•Use the PC in an environment that conforms to the general specifications in the manual.
Using the PC in environments outside the ranges stated in the general specifications will cause electric shock, fire,
malfunction, or damage to/deterioration of the product.
•Make sure that the module fixing projection on the base of the module is properly engaged in the module fixing hole
in the base unit before mounting the module.(A(1S)J71DN91 must be screwed to the base unit with the specified
torque.)
Failure to mount the module properly will result in malfunction or failure, or in the module falling.
•Do not touch conductive parts or electronic components of the module with your bare hands.
This could cause malfunction or failure of the module.
[Cautions on Wiring]
DANGER
•Switch off all phases of the power supply outside the PC before starting installing or wiring work.
If all phases are not switched off, there will be a danger of electric shock or damage to the product.
CAUTION
•Connect the FG terminal to a dedicated PC ground connection with class 3 grounding or higher.
Failure to do this may result in malfunction.
•Tighten terminal screws to the prescribed torque.
Loose terminal screws can cause shorting and malfunctions.
•Make sure that no foreign matter such as chips or wire offcuts gets inside the module.
It will cause fire, failure, or malfunction.
•The communication cables and power cables connected to the unit must be enclosed in a duct or fixed with clamps.
Failure to do this can result in malfunction due to damage to the unit or cables or defective cable contact caused by
looseness or movement of the cables or accidental pulling on the cables.
•When disconnecting a communication cable and power cable from the unit, do not pull on the cable itself.
If the cable has a connector, pull on the connector to disconnect it from the unit.
If the cable has no connector, loosen the screw where the cable attaches to the unit before disconnecting the cable.
Pulling on a cable while it is connected to the unit can damage the unit or cable, or cause malfunctions due to
defective cable contact.
Always turn off all external power supply phases before touching any terminals.
Failure to do this may result in malfunction.

[Cautions on Startup and Maintenance]
CAUTION
•Always turn off all external power supply phases before touching any terminals.
Failure to do this may result in malfunction.
•Always turn off all external power supply phases before cleaning or tightening the terminal screws.
Failure to do this may result in malfunction.
•Do not disassemble or modify any module.
This will cause failure, malfunction, injuries, or fire.
•Always turn off all external power supply phases before mounting or dismounting the unit.
Failure to do this may result in malfunction or damage to the unit.
[Cautions on Disposal]
CAUTION
•Dispose of this product as industrial waste.

−i−
INTRODUCTION
Thank you for purchasing the Mitsubishi MELSEC-A-series.
Before using the equipment, please read the manual carefully to develop full familiarity with the functions and
performance of MELSEC-A-series you have purchased, so as to ensure correct use.
Please forward a copy of this manual to the end user.
CONTENTS
1. OUTLINE 1 – 1 ~ 1 – 8
1.1 Features.........................................................................................................................................1 – 1
1.2 Communication Outline...................................................................................................................1 – 3
1.2.1 Network configuration........................................................................................................1 – 3
1.2.2 Outline of parameter settings.............................................................................................1 – 5
1.2.3 Outline of DN91 - slave station communication...................................................................1 – 5
2. SYSTEM CONFIGURATION 2 – 1 ~ 2 – 6
2.1 Overall Configuration......................................................................................................................2 – 1
2.1.1 Sample system configuration connected with a trunk line....................................................2 – 1
2.1.2 Sample system configuration connected with a drop line.....................................................2 – 1
2.1.3 System configuration with a DeviceNet master unit.............................................................2 – 2
2.2 Applicable Systems ........................................................................................................................2 – 3
2.2.1 Mountable CPUs and number of units................................................................................2 – 3
2.2.2Important points about the system configuration.................................................................2 – 4
2.2.3 Operating environment of the configuration software (parameter setting tool)......................2 – 5
2.3 Products Connectable to a Slave Station.........................................................................................2 – 6
3. SPECIFICATIONS 3 – 1 ~ 3 – 26
3.1 General Specifications....................................................................................................................3 – 1
3.2 Performance Specifications.............................................................................................................3 – 2
3.2.1 Maximum transfer distance for thick cable/thin cable combination.......................................3 – 2
3.3 PC CPU I/O Signals........................................................................................................................3 – 3
3.3.1 Table of I/O signals............................................................................................................3 – 3
3.3.2 I/O signal details ...............................................................................................................3 – 5
3.4 Buffer Memory................................................................................................................................3 – 8
3.4.1 Buffer memory table..........................................................................................................3 – 8
3.4.2 Details of the buffer memory..............................................................................................3 – 9

−ii −
4. FUNCTIONS 4 – 1 ~ 4 – 5
4.1 I/O Communication Functions .........................................................................................................4 – 1
4.2 Message Communication Functions................................................................................................4 – 3
4.2.1 Get attribute......................................................................................................................4 – 3
4.2.2 Set attribute......................................................................................................................4 – 4
4.2.3 Read communication error information...............................................................................4 – 5
5. SETTINGS AND PROCEDURES BEFORE OPERATION 5 – 1 ~ 5 – 10
5.1 Settings and Procedures.................................................................................................................5 – 1
5.1.1 DN91 start-up procedure when setting parameters with a sequence program......................5 – 1
5.1.2 DN91 start-up when setting parameters with the configuration software ..............................5 – 2
5.2 Mounting and Installation ................................................................................................................5 – 3
5.2.1 Handling instructions.........................................................................................................5 – 3
5.2.2 Installation environment.....................................................................................................5 – 3
5.3 Nomenclature.................................................................................................................................5 – 4
5.4 LED Displays and Indicator Descriptions..........................................................................................5 – 5
5.5 Connecting Communication Cable to DN91.....................................................................................5 – 6
5.6 Instructions for Connecting the Network Power Supply.....................................................................5 – 7
5.6.1 Network power supply unit installation position...................................................................5 – 7
5.6.2 Calculating network power supply unit installation position and current capacity ..................5 – 8
6. PARAMETER SETTINGS 6 – 1 ~ 6 – 7
6.1 Setting Parameter...........................................................................................................................6 – 1
6.2 Important Points about the Parameter Settings ................................................................................6 – 2
6.3 Setting with a Sequence Program ...................................................................................................6 – 2
6.4Setting Parameters with the Configuration Software (Parameter Setting Tool)...................................6 – 3
6.4.1 Setting configuration..........................................................................................................6 – 3
6.4.2 Setting master parameters ................................................................................................6 – 4
6.4.3 Setting bus parameters .....................................................................................................6 – 5
6.4.4 Set the device (slave station) parameters...........................................................................6 – 6
7. PROGRAMMING 7 – 1 ~ 7 – 9
7.1 Important Points about Programming...............................................................................................7 – 1
7.2 System Configuration......................................................................................................................7 – 2
7.3 Setting Parameters with a Sequence Program.................................................................................7 – 4
7.4 I/O Communication with Slave Stations ...........................................................................................7 – 6
7.4.1 Reading slave station I/O data...........................................................................................7 – 6
7.4.2 Writing slave station I/O data.............................................................................................7 – 6
7.5 Message Communication................................................................................................................7 – 7
7.5.1 Message communication – reading....................................................................................7 – 7
7.5.2 Message communication – writing .....................................................................................7 – 8
7.6 Acquiring Error Information..............................................................................................................7 – 9

−iii −
8. TROUBLESHOOTING 8 – 1 ~ 8 – 12
8.1 Troubleshooting Tables...................................................................................................................8 – 2
8.1.1 Troubleshooting by Symptom Type....................................................................................8 – 2
8.1.2 Problems due to incorrect parameter settings.....................................................................8 – 5
8.2 Troubleshooting Using LED Indications............................................................................................8 – 5
8.2.1 Errors caused by the master unit .......................................................................................8 – 5
8.2.2 Errors caused by incorrect parameter settings or abnormal network....................................8 – 6
8.3 Troubleshooting Using Error Codes.................................................................................................8 – 8
8.3.1 Communication error codes...............................................................................................8 – 8
8.3.2 Execution error codes for message communication..........................................................8 – 11
APPENDICES APP – 1 ~ APP – 4
APPENDIX 1 External View...............................................................................................................APP – 1
1.1 AJ71DN91.................................................................................................................................APP – 1
1.2 A1SJ71DN91.............................................................................................................................APP – 2
APPENDIX 2 Parameter Setting Sheet ..............................................................................................APP – 3
APPENDIX 3List of Communication Parameter with Each Maker’s Slave Station................................APP – 4

1. OUTLINE
1−1
MELSEC-A
1. OUTLINE
This manual gives information including the specifications and descriptions of parts of the
AJ71DN91/A1SJ71DN91 DeviceNet Master Unit (hereafter AJ71DN91, A1SJ71DN91, or
DN91), which is used in combination with the MELSEC-A/QnA Series PLC CPU.
DN91 is the DeviceNet master station which controls the DeviceNet devices.
See the DeviceNet Specifications (Release 2.0) Volume 1 and Volume 2 for details about the
DeviceNet Specifications.
DeviceNet is a registered trademark of the Open DeviceNet Vendor Association, Inc.
POINT
While it is considered connectable with most commercially available Device-Net
products, we cannot guarantee the connectivity with products of other manufacturers.
1.1 Features
This section describes the features of DN91.
(1) Conforms to the DeviceNet specifications (Release 2.0).
(2) DN91 operates as the DeviceNet master station to permit I/O and message
communications with the DeviceNet slave stations.
(3) Each master unit can communicate with up to 63 slave stations.
(4) The communication method for I/O communication can be selected indepen-dently for
each slave station from the following four methods prescribed for DeviceNet: polling, bit
strobe, change of state, and cyclic.
However, only one communication method can be selected for each slave station.
(5) I/O communication permits communication of 256 bytes of inputs (2048 points) and 256
bytes of outputs (2048 points) in the edit mode.
(6) Each message communication can communicate 240-byte message data.
(7) Any of the following two methods may be used to set the DN91 parameters:
•Use TO command of the sequence program to set the parameters.
•Use the configuration software to set the parameters. (Refer to the Section 2.2.3 for
the configuration software.)
DN91
Slave station 1 Slave station 2 Slave station 3 Slave station 4
Polling
Bit strobe
Change of state
Cyclic
DeviceNet network

1. OUTLINE
1−2
MELSEC-A
REMARK
When a network analyzer is connected to monitor the DeviceNet network, DN91 is recognized as a product
of the Hilscher company.