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MELSEC-Q

9 TROUBLESHOOTING

This chapter explains the contents of errors that may occur while using the QJ71DN91

as well as their troubleshooting procedures.

This chapter consists of the following two sections:

Section 9.1 Items to Check When an Error Occurs

Shows troubleshooting procedures based on the phenomenon of errors.

Section 9.2 Error Codes

Shows the action to be taken based on the error codes.

Summary of Contents for QJ71DN91

Page 1: ...DeviceNet Master Slave Module User s Manual U User s Manual Mitsubishi Programmable Logic Controller DeviceNet Master Slave Module QJ71DN91 GX Configurator DN SW1D5C QDNU E ...

Page 2: ...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 If a communications error occurs to a device network the node in such a communications error will be in a state as follows 1 The master node QJ71DN91 maintains input data which had been received from the slave node before the error occurred 2 Whet...

Page 3: ... in the module WIRING PRECAUTIONS DANGER Make 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 Be careful not to let foreign matters such as sawdust or wire chips get inside the module These may cause fires failure or malfunction The top surface of the...

Page 4: ...es 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 module Failure to do this may result in malfunction or damage to the module DISPOSAL PRECATION CAUTION Dispose of this produc...

Page 5: ...on 2 2 2 4 Section 6 2 6 2 1 6 2 2 6 3 3 6 5 Feb 2002 SH NA 080143 C Correction About the Generic Terms and Abbreviations Section 2 2 Section 6 2 1 6 2 2 Japanese Manual Version SH 080125 C 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 ind...

Page 6: ... 2 3 2 3 How to Check the Function Version Serial No and Software Version 2 4 2 4 About Use of the QJ71DN91 with the Q00J Q00 Q01CPU 2 5 2 5 Compatible DeviceNet Products from Other Manufacturers 2 5 3 SPECIFICATIONS 3 1 to 3 50 3 1 Performance Specifications 3 1 3 1 1 Maximum transmitting distance when thick and thin cables coexist 3 1 3 2 Functions 3 2 3 2 1 Master function I O communication fun...

Page 7: ...ition 4 11 4 7 2 Calculating network power supply unit installation position and current capacity 4 12 5 PARAMETER SETTINGS 5 1 to 5 6 5 1 Description of Parameter Settings 5 1 5 1 1 Parameters for the master function 5 1 5 1 2 Parameters for the slave function 5 2 5 1 3 Common parameters for the master slave functions 5 2 5 2 Setting Using the Sequence Program 5 2 5 3 Setting Using the Auto Confi...

Page 8: ...BLESHOOTING 9 1 to 9 12 9 1 Items to Check When an Error Occurs 9 2 9 1 1 Checking the LEDs 9 2 9 1 2 When communication with all slave nodes cannot be performed using the master function 9 3 9 1 3 When communication with a specific slave node cannot be performed using the master function 9 4 9 1 4 When communication with the master node cannot be performed using the slave function 9 5 9 2 Error C...

Page 9: ...ake those steps individually About the Generic Terms and Abbreviations Unless otherwise specified this manual uses the following generic terms and abbreviations to explain QJ71DN91 DeviceNet Master Slave Module Generic Term Abbreviation Description GX Developer Generic product name of the product types SWnD5C GPPW E SWnD5C GPPW EA SWnD5C GPPW EV and SWnD5C GPPW EVA n in the model is 4 or greater Q...

Page 10: ...t configuration Model name Product name Quantity QJ71DN91 DeviceNet master slave module 1 Terminal resistor 121Ω 1 4W 2 QJ71DN91 Connector 1 SW1D5C QDNU E GX Configurator DN Version 1 1 license product CD ROM 1 SW1D5C QDNU EA GX Configurator DN Version 1 Multiple license product CD ROM 1 ...

Page 11: ...1DN91 1 The module conforms to the DeviceNet Specifications Manual Release 2 0 2 The module can function as a master node slave node or master slave node of DeviceNet Master made by other manufacturer 24V power supply Master station M S Slave side I O communication between the master station and slave station is possible Communication is not possible DeviceNet slave M S Node No 10 Node No 2 S S S ...

Page 12: ... selected for each slave node Slave node 1 Slave node 2 Slave node 3 Slave node 4 QJ71DN91 DeviceNet network Polling Bit strobe Cyclic Change of state For I O communication see Section 3 2 1 7 When the module functions as a master node of DeviceNet an I O communication with input of 256 words 4 096 points and output of 256 words 4 096 points can be performed 8 When the module functions as a master...

Page 13: ...ne branch line Power supply tap Drop line Trunk line main line Master node Slave node 1 The QJ71DN91 can be used as a master node a slave node or a master slave node 2 A combined maximum of 64 master node and slave nodes can be connected 3 There is no need to connect the master node and slave nodes in the order of node number 4 The network cable consists of trunk line main line and drop lines bran...

Page 14: ...rk The following describes the method of supplying network power to each node 1 Connect a dedicated power supply tap to the trunk line cable and install the network power supply module 2 The power is supplied from the network power supply module to each node via the network cable Remarks Inquire to ODVA about the following devices required to construct a DeviceNet network Network power supply modu...

Page 15: ...e 2 Base unit in which the conversion module can be installed The QJ71DN91 can be installed in any I O slot 2 of the base unit However a power shortage may occur depending on the combination with other installed modules and the number of modules used so always take into consideration the power supply capacity when installing modules 2 Limited to the range of the number of I O points in the CPU mod...

Page 16: ...se the DeviceNet communication cable power cable and signal lines for the I O module should be installed in such a way that they are sufficiently away from each other 6 Remote operation is not allowed from other DeviceNet node Each DeviceNet node on DeviceNet cannot read write monitor the sequence program or data of the PLC CPU where the QJ71DN91 is installed 2 3 How to Check the Function Version ...

Page 17: ...he Q00J Q00 Q01CPU is explained 1 Number of QJ71DN91 that can be installed when the Q00J Q00 Q01CPU is used See item 2 2 concerning the number of QJ71DN91 that can be installed when the Q00J Q00 Q01CPU is used 2 Limitations when using the Q00J Q00 Q01CPU When using Q00J Q00 Q01CPU use QJ71DN91 which function version is B and first 5 digits of the serial No is 03052 or later 2 5 Compatible DeviceNe...

Page 18: ...ata I O communica tion Receive Max 1024 points 128 bytes Communications speed One speed can be selected from 125 kbps 250 kbps and 500kbps Maximum transmitting distance of trunk line Length of drop line Communic ations speed Thick Cables Thin Cables Thick and thin cables coexist Maximum Total 125 kbaud 500 m 156 m 250 kbaud 250 m 78 m Maximum cable length 500 kbaud 100 m 100 m See 3 1 1 6 m 39 m C...

Page 19: ...0700H 07FFH 4 Master function transmit data area 0900H 09FFH Transmission Reception 5 2 X Y I O communication 1 When the I O communication request Y11 is set the I O communication with each slave node starts It is not necessary to set Y11 however when the auto communication start is set with a parameter Reception data 2 The input status from each slave node is automatically stored in the master fu...

Page 20: ...s It is not necessary to set Y11 however when the auto communication start is set with a parameter Reception data 2 The input status from each slave node is automatically stored in the master function receive data area of the buffer memory in the QJ71DN91 3 The input status stored in the master function receive data area of the buffer memory is loaded onto the PLC CPU by the FROM instruction of th...

Page 21: ...epeated as described from 1 to 6 is the polling communication The connection that uses this communication is the polling connection 1 The master node transmits the output data 2 The slave node transmits input data by setting 1 to trigger 3 The master node transmits the output data 4 The slave node transmits input data by setting 3 to trigger 5 The master node transmits the output data 6 The slave ...

Page 22: ...that uses this communication is the bit strobe connection 1 Output information of a maximum of one bit is transmitted simultaneously to each slave node 2 The slave node transmits the input data by setting the transmission of 1 to trigger 3 The slave node transmits the input data by setting the transmission of 1 to trigger 4 The slave node transmits the input data by setting the transmission of 1 t...

Page 23: ...nd the connection that uses this communication is the change of state connection No data transmission is performed unless the I O data is changed 1 When the output data of the master node changes the data is sent to the slave node 2 When the input data of the slave node changes the data is sent to the master node There is no concept of the network scan in the change of state communication Master n...

Page 24: ... of the master node is sent to the slave node 2 The data of the slave node is sent to the master node The cycle of the cyclic communication can be specified for each slave node Specify the cycle of the cyclic communication in the following parameter items Transmission cycle from master node Production inhibit time Transmission cycle from slave node Expected packet rate There is no concept of the n...

Page 25: ...the message communication request Y12 is turned ON by the sequence program the data which is set in the message communication command area in the buffer memory is sent to the slave node and the message communication starts 3 When the QJ71DN91 receives data from the slave node it is processed as follows The specific data of the slave node that is set in the message communication command area is sto...

Page 26: ...e sequence program writes the data to be written in the message communication data area of the buffer memory 3 When the message communication request Y12 is turned ON the data which is stored in the message communication data area of the buffer memory is written to the slave node in the area specified by the message communication command 4 When the write process is finished the message communicati...

Page 27: ...ommunication request Y12 is turned ON by the sequence program the error information of the applicable slave node that has been accumulated in the QJ71DN91 is read and processed as follows The error information of the slave node that was set by the message communication command area is stored in the message communication data area of the buffer memory The processing result of the message communicat...

Page 28: ...ommunication with the master node starts when the I O communication request Y11 is turned ON Reception data 2 Transmission data from the master node is automatically stored in the slave function receive data area of the buffer memory in the QJ71DN91 3 Transmission data from the mater node which is stored in the slave function receive data area of the buffer memory is loaded onto the PLC CPU by the...

Page 29: ...11 is turned ON Reception data 2 Transmission data from the master node is automatically stored in the slave function receive data area of the buffer memory in the QJ71DN91 3 The transmission data from the master node which is stored in the slave function receive data area of the buffer memory is loaded onto the PLC CPU by the FROM instruction of the sequence program Transmission data 4 The TO ins...

Page 30: ...ameter To Flash ROM Completion Y07 X08 Slave Function For Error Set Signal Y08 X09 Use prohibited Y09 X0A H W Testing At the time of the hardware test Y0A X0B H W Test Completion At the time of the hardware test Y0B X0C H W Test Error Detection At the time of the hardware test Y0C X0D Y0D X0E Use prohibited Y0E X0F Module Ready Y0F X10 Y10 Use prohibited X11 Y11 I O Communication Request X12 Y12 M...

Page 31: ...O communication use the sequence program to turn ON the I O communication request Y11 3 When the I O communication request Y11 is turned ON the parameter check is executed If the parameter check is successful the I O communication starts and the I O Communicating X01 is turned ON If the parameter check fails the master function for error set signal X03 is turned ON and the ERR LED is lit Check the...

Page 32: ...r check fails the master function for error set signal X03 is turned ON and the ERR LED is lit Check the contents of the error with the master function for error information of the buffer memory address 1B1H POINT To stop the I O communication set Y11 then reset after 200 ms or longer When the parameter check is successful Module Ready X0F I O Communicating X01 Parameter check When the parameter c...

Page 33: ...rameter check is executed If the parameter check is successful the I O communication starts and the I O communicating X01 is turned ON If the parameter check fails the slave function for error set signal X08 is turned ON and the ERR LED is lit Check the contents of the error with the error information for the slave function of the buffer memory address 601H c To stop the I O communication use the ...

Page 34: ... completed The communication result is written into the message communication result area and the message communication completion X02 is turned ON c Check the message communication result with the message communication error signal X05 d After reading the communication data by the FROM instruction use the sequence program to turn OFF the message communication request Y12 The message communication...

Page 35: ...ror reset request Y13 and the error code of the error information for the master function area is cleared Read error information FROM instruction Master Function For Error Reset Request Y13 Master Function For Error Set Signal X03 FROM TO Error code clear 6 Slave Down Signal X04 This signal indicates whether or not a slave node that is being stopped for communication exists a This signal is turned...

Page 36: ... function for error set signal X03 will turn ON and the ERR LED will light Check the contents of the error in the error information for the master function of the buffer memory address 1B1H c When the saving parameters to the flash ROM is completed the save parameter to flash ROM completion X07 signal is automatically turned ON Communications with other slave nodes are stopped while the parameter ...

Page 37: ...parameter in the setting area of the number of slave function reception bytes and the setting area of the number of slave function transmission bytes of the buffer memory 2 Set the parameter save area selection bit 3 Use the sequence program to turn ON the save parameter to flash ROM request Y17 b When the request to save parameters to the flash ROM is accepted and if the number of I O points chec...

Page 38: ...t Y17 is turned ON while the I O communicating X01 is ON save parameter to flash ROM completion X07 is not turned ON Turn OFF the I O communication request Y11 then after confirming that the I O communicating X01 is OFF turn ON the save parameter to flash ROM request Y17 again from the OFF state 2 Even if the I O communication request Y11 is turned ON while the save parameter to flash ROM request ...

Page 39: ...nction area will be cleared Read error information FROM instruction Slave Function For Error Reset Request Y18 Slave Function For Error Set Signal X08 FROM instruction Error code clear 10 H W Testing X0A H W Test Completion X0B H W Test Error Detection X0C These signals indicate the status when the QJ71DN91 is set to the hardware test mode mode 9 a When the mode switch is set to 9 and the power is...

Page 40: ...generated by auto configuration processing is stored in the parameters for the master function area of the buffer memory and the auto configuration completion X15 is turned ON I O Communication Request Y11 I O Communicating X01 Auto Configuration Request Y15 Auto Configuration Completion X15 Auto Configuration Executing X14 POINT 1 Confirm that the I O communication request Y11 is turned OFF When ...

Page 41: ...For Error Information Higher byte Error code Lower byte Stores the node number where the error occurred No 3 4 2 5 01B2H 434 Bus Error Counter Stores the number of times errors are detected in the communication data No 3 4 2 6 01B3H 435 Bus Off Counter Stores the number of communication errors No 3 4 2 7 01B4H to 01B7H 436 to 439 Each Node Configuration Status Indicates whether or not each slave n...

Page 42: ...1573 Node number Displays the node number currently in operation No 3 4 2 22 0626H 1574 Mode Switch Number Displays the mode switch number currently in operation No 3 4 2 23 0627H to 062DH 1575 to 1581 Use prohibited 062EH 1582 H W Test Item Display Area Displays the item number of the hardware test being executed At the time of the hardware test No 3 4 2 24 062FH 1583 H W Test Result Storing Area...

Page 43: ...er of the slave node MAC ID Higher byte Class ID of the object 0112H Instance ID Instance ID of the object 0113H Attribute ID Lower byte Attribute ID of the object Higher byte Always sets to 0 b To set attribute data into the slave node 1 Use the TO instruction to set the command data in the message communication command area 2 Use the TO instruction to set the attribute data to be set in the mess...

Page 44: ...mmunication request Y12 4 The message communication completion X02 is automatically turned ON when the message communication is completed 5 Verify with the message communication error signal X05 whether the message communication is normally completed The data to be set by the sequence program is listed in Table 3 7 Table 3 7 Setting data for Reset Buffer memory address hexadecimal Item Description...

Page 45: ...e Attribute ID of the object Higher byte Byte length of the gotten attribute data 1 to 240 1H to F0H Table 3 10 Result data of Set Attribute Buffer memory address hexadecimal Item Description 0120H Command number 0102H Set Attribute 0121H Execution error code Normal completion 0000H Failed Execution error code 0122H Slave node number slave MAC ID class ID Lower byte Node number of the slave node M...

Page 46: ...D data length Lower byte Attribute ID of the object Higher byte Byte length of the gotten attribute data 1 to 240 1H to F0H 3 Message communication data addresses 0130H to 01A7H 304 to 423 The message communication data area is used for the following application a Getting attribute data The attribute data that was gotten via the message communication is stored as a byte string 2nd byte 4th byte 6t...

Page 47: ...nt from the slave node Valid only when the communication error code is 35 0023H See 2 1 0134H Additional error code Stores an additional error code sent from the slave node 2 0135H Heartbeat timeout count Stores the number of times that detected the down status of each slave node by DN91 1 Refer to the manual of each slave node for the contents and handling for the actual errors 2 Refer to the man...

Page 48: ... 22 Object does not exist Requested service specified unimplemented object 0017H 23 Reserved Reserved by DeviceNet 0018H 24 No stored attribute data Attribute data of this object had not been saved before this service was requested 0019H 25 Store operation failure Attribute data of this object was not saved due to an error that occurred during the save operation 001AH to 001EH 26 to 30 Reserved Re...

Page 49: ...lly changes from Offline to Stop if the auto communication start setting in the buffer memory address 0631H is 0 The status automatically makes transitions from Offline to Operate if the setting is 1 If a reset message is received from the DeviceNet network the status automatically returns to Offline and makes transitions from Offline to Operate Offline Stop Operate b Lower byte This byte indicate...

Page 50: ...f the node with the smallest node number MAC ID is stored 6 Bus Error Counter address 01B2H 434 The number of times that the illegal frame count of the CAN chip DeviceNet s communication chip exceeded 96 is stored When this value is large it indicates that communication is unstable 7 Bus Off Counter address 01B3H 435 The number of times that the QJ71DN91 makes a transition to the Bus off status is...

Page 51: ...d occurred in each slave node When the corresponding bit is ON Problem information exists When the corresponding bit is OFF No error information exists Use the following procedure to turn OFF the corresponding bit a Using the message communication area of the buffer memory execute the readout of the communication error information of the corresponding node For information on the readout of communi...

Page 52: ...4 Node 1 Node 0 01CD Node 31 Node 30 Node 17 Node 16 01CE Node 47 Node 46 Node 33 Node 32 01CF Node 63 Node 62 Node 49 Node 48 POINT For the node that is set as a reserved node by the parameter setting turn ON the corresponding bit of the down node detection disable status If it remains OFF it is recognized as a down node even if it is a reserved node 12 Parameters for the master function addresse...

Page 53: ...ies depending on the connection type See Table 3 22 for details of setting values 01DEH Watchdog timeout action of the 1st slave node Operation during watchdog timeout at a slave node Setting vlaue 0000H default value Same as the following timeout Setting value 0001H Timeout The connection is placed in timeout state It will not be recovered until an operator stops the communication and then resume...

Page 54: ...setting Same as the 1st node 02F8H to 02FFH 37th node setting Same as the 1st node 0300H to 0307H 38th node setting Same as the 1st node 0308H to 030FH 39th node setting Same as the 1st node 0310H to 0317H 40th node setting Same as the 1st node 0318H to 031FH 41st node setting Same as the 1st node 0320H to 0327H 42nd node setting Same as the 1st node 0328H to 032FH 43rd node setting Same as the 1s...

Page 55: ... Minimum transmission interval of the slave node Sets the minimum time that the slave can prepare the transmission data The master node transmits the bit strobe request to the node according to this time interval 2 When the value of the expected packet rate setting is not equal to 1 i e when the expected packet rate is not equal to 0ms the expected packet rate must be equal to or greater than the ...

Page 56: ...from node 0 to the maximum detection node number and stores the result in the parameters for the master function area Additional configuration Searches all of the slave nodes on the network except for the local node and the slave nodes that have been already set from node 0 to the maximum detection node number then stores the result after the parameters for the master function area that has been a...

Page 57: ...ad address of the 1st slave node Input data size word count of the 1st slave node Output data head address of the 1st slave node Output data size word count of the 1st slave node Input data head address of the 2nd slave node Output data size word count of the 63rd slave node 15 Present Link Scan Time address 05FCH 1532 The current link scan time module ms is stored 16 Minimum Link Scan Time addres...

Page 58: ...ng to establish the connection from the master node 00C0H Operate I O communication in progress When the power is turned ON the status of the slave function automatically changes from Offline to Stop if the auto communication start setting in the buffer memory address 0631H is 0 The status automatically makes transitions from Offline to Operate if the setting is 1 If a reset message is received fr...

Page 59: ... and the communication starts if there is no error Although the contents of the buffer memory are cleared when the power is turned OFF and at reset the contents of the parameters saved in the flash ROM are stored in the setting area of the number of slave function reception bytes and in the setting area of the number of slave function transmission bytes if the flash ROM contains valid parameters T...

Page 60: ... QJ71DN91 is stored in ASCII code 0620H 0621H 0622H 0623H 0624H J Q 7 1 N 1 D 9 0 0 22 Node Number address 0625H 1573 The node number currently in operation is stored 00H to 3FH Stores in binary code 23 Mode Switch Number address 0626H 1574 The mode switch number currently in operation is stored ...

Page 61: ...ation test starts 0001H Node number duplicate check Checking if there is another node with the same node number as that of the local node 0002H Communication check Checking if communication with one or more nodes in the network is available FFFFH Test completed normally Communication test was executed and completed normally 25 H W Test Result Storing Area address 062FH 1583 The results of the hard...

Page 62: ... cable is correct etc 0006H No error Communication test was completed normally 26 Parameter save area selection bit address 0630H 1584 This bit selects which parameter is to be saved when the save parameter to flash ROM request Y17 is turned ON from OFF To clear the parameters of the flash ROM set 8000H In this case the parameters of the buffer memory are not cleared The default value varies depen...

Page 63: ...f double word input modules 2 2nd node Number of byte input modules 1 3rd node Number of byte input modules 1 Buffer memory address 0700H 0701H 0702H 0703H 0704H 0705H 0706H 0707H 0708H 0709H If there in an odd number of byte input modules one byte of empty area will be inserted Input data of the 1st node Input data of the 3rd node 2nd byte module 1st byte module 3rd byte module Empty 1st word mod...

Page 64: ... node Number of byte output modules 3 Number of word output modules 2 Number of double word output modules 2 2nd node Number of byte output modules 1 3rd node Number of byte output modules 1 Buffer memory address 0900H 0901H 0902H 0903H 0904H 0905H 0906H 0907H 0908H 0909H If there is an odd number of byte output modules one byte of empty area will be inserted Output data of the 1st node Output dat...

Page 65: ...ta addresses 0C00H to 0B3FH 3072 to 3135 The data to be transmitted to the master node is written by the TO instruction The I O data of the size which is set by the setting area of the number of slave function transmission bytes is sent 0C00H 0C01H 0C02H 2nd byte 1st byte 3rd byte 4th byte 6th byte 5th byte POINT When the QJ71DN91 is used as the master node set an even number of byte modules If an...

Page 66: ...e baud rate 500kbaud 1 250kbaud 2 125kbaud 4 1 How to calculate TIn 1 When the length of reception data from the nth slave is 8 bytes or less TIn BT BTa reception data length bytes 2 When the length of reception data from the nth slave is 9 bytes or more TIn BT BTa 8 0 190 a BT BTa b 1 0 450 whereas a reception data length divided by 7 round down below decimal point b remainder of reception data l...

Page 67: ...nication cycle LC LS production inhibit time module ms 3 5 3 Transmission delays 1 Input transmission delay The input transmission delay can be calculated using the following expressions When the reception data is read by the sequence program When auto refresh is used Maximum value LS 2 Sequence scan time Normal value LS Sequence scan time x 0 5 module ms 2 Output transmission delay The output tra...

Page 68: ...to the QCPU Create a sequence program for control Load the sequence program to the PLC CPU and reset Trial run Yes No Create parameters for the master function using a sequence program Create parameters for the master function using auto configuration Create a sequence program for auto communication start settings and save it in the flash ROM of the QJ71DN91 Create a sequence program for refresh C...

Page 69: ... for control Load the sequence program to the PLC CPU and reset Trial run Yes No Create a sequence program for auto communication start settings and save it in the flash ROM of the QJ71DN91 Create a sequence program for refresh Create a sequence program for control Load the sequence program to the PLC CPU and reset Trial run End Save the parameters using a sequence program Y17 NG OK NG OK Setting ...

Page 70: ...te parameters for the master function using auto configuration Create a sequence program for auto communication start settings and save it in the flash ROM of the QJ71DN91 Create a sequence program for refresh Create a sequence program for control Load the sequence program to the PLC CPU and reset Trial run End Save the parameters using a sequence program Y17 NG OK NG OK It is necessary to install...

Page 71: ...eign objects such as wire chips from entering the module during wiring Do not remove this film until the wiring is complete Before operating the system be sure to remove the film to provide adequate heat ventilation 5 Tighten the mounting screws using the torque within the range listed below If the screws are not tightened securely it may cause short circuit breakdown or malfunction Screw location...

Page 72: ...J71DN91 the meanings of the LED displays and the setting procedure of the switches QJ71DN91 RUN MS NS ERR NODE ADDRESS X10 X1 MODE DR 0 M 125 1 M 250 2 M 500 3 S 125 4 S 250 5 S 500 6 D 125 7 D 250 8 D 500 M O D E QJ71DN91 1 2 3 4 5 6 78 9 0 A B C D E F 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 Mode switch Node number setting switch DeviceNet connector ...

Page 73: ...R Red On Node number setting error Flashing The node number setting switch or mode setting switch was changed during module operation MS Green On Communication is enabled Flashing parameter error NS Green On Communication in progress Flashing Waiting for communication waiting for an I O communication request from the PLC CPU or waiting for communication startup of the opposite device Red On The no...

Page 74: ...witch The following explains the mode switch of the QJ71DN91 Table 4 3 Description of the mode switch Name Setting Function Description Mode switch 0 Master function Operates as the master node communication speed 125k baud setting at the time of factory shipment 1 Operates as the master node communication speed 250k baud 2 Operates as the master node communication speed 500k baud 3 Slave function...

Page 75: ...rror code at buffer memory 062FH Error occurred Perform microcomputer check Displays 3 at buffer memory 062EH Yes No Error occurred Normal completion Illuminates the MS LED in green and stores FFFF at buffer memory 062EH Yes No Perform wiring of the network power supply and turn ON the power Perform CAN controller check Displays 4 at buffer memory 062EH Error occurred Yes No Abnormal completion Il...

Page 76: ... the connector and cable match 2 Grounding the network The DeviceNet network should be grounded at a single point near the center of the network Connect the cable shield drain wire to the ground of the power supply unit and perform Class D grounding Class 3 grounding If multiple power supply units exist in a network ground only the power supply unit near the center of the network and do not ground...

Page 77: ...ware test result storage area Match the communication speed of the QJ71DN91 with that of the DeviceNet station of the communication counterpart Set the mode switch between A and C Turn ON the power of the network and the power of the DeviceNet station of the communication counterpart Normal completion Turn ON the power of the QJ71DN91 The MS LED flashes in green The MS LED illuminates in green The...

Page 78: ...he current value calculated at step 1 exceeds the current value calculated at step 3 refer to the next page to determine whether the network power to all nodes 6 If the results from step 5 indicate that power cannot be supplied to all nodes increase the number of network power supply units Table 4 4 Maximum current capacity corresponding to the network length of thick cable Network length m 0 25 5...

Page 79: ...fore this configuration allows power supply to all nodes 2 Network power supply unit connected to the center of the network The current capacity is calculated as shown below when the network power supply unit it connected at the center of a thick cable network In this case the network power supply unit can supply twice the current compared to when it is connected to the end of the network Master s...

Page 80: ...ty to the left of the network power supply unit is insufficient If this type of situation occurs move the network power supply unit in the direction of insufficient current capacity to the left in the diagram above Master station 1 1A Slave station 1 25A Slave station 0 5A 100m Termination resistance Termination resistance Slave station 0 25A Slave station 0 25A Slave station 0 85A 140m Network po...

Page 81: ...0m Slave station 0 1A Termination resistance Thick cable power supply distance 200 m Drop line power supply distance 6 m Total current capacity 0 5 A 0 15 A 0 05 A 0 25 A 0 1 A 1 05 A Max current capacity of 200 m of thick cable from Table 4 4 1 53 A Max current capacity of 6 m of drop line from Table 4 6 0 75 A Total current of devices connected to drop line 0 1 A Therefore this configuration all...

Page 82: ...ion 1 Description of the parameter settings using the sequence program The parameter settings using the sequence program include the following items 1 Constant scan 2 nth node number MAC ID 3 Node number of the nth connection type of the nth slave node 4 Number of byte module points of the nth slave node 5 Number of word module points of the nth slave node 6 Number of double word module points of ...

Page 83: ...s for the master slave functions 1 Description of the parameter settings using the sequence program The parameter settings using the sequence program include the following items 1 Auto communication start settings For the method and details of the parameter settings using the sequence program see Section 7 3 1 Parameter settings using the sequence program Section 8 2 Parameter settings using the s...

Page 84: ...he maximum detection node number 00H to 3FH 0 to 63 Default value 3FH The following two auto configuration types are available All configuration Searches all the slave nodes in the network having node numbers 0 to the maximum detection node number except the local node number and saves them in the parameters for the master function area The areas after the detected slave nodes will be cleared Addi...

Page 85: ...count of the 1st slave node Lower byte Input word module count Higher byte Output word module count set in hexadecimal 01DCH Double word module count of the 1st slave node Lower byte Input double word module count Higher byte Output double word module count set in hexadecimal 01DDH Expected packet rate of the 1st slave node EXPECTED PACKET RATE Sets the expected packet rate at a slave node Setting...

Page 86: ...ode setting Same as the 1st node 02B8H to 02BFH 29th node setting Same as the 1st node 02C0H to 02C7H 30th node setting Same as the 1st node 02C8H to 02CFH 31st node setting Same as the 1st node 02D0H to 02D7H 32nd node setting Same as the 1st node 02D8H to 02DFH 33rd node setting Same as the 1st node 02E0H to 02E7H 34th node setting Same as the 1st node 02E8H to 02EFH 35th node setting Same as th...

Page 87: ...node setting Same as the 1st node 0398H to 039FH 57th node setting Same as the 1st node 03A0H to 03A7H 58th node setting Same as the 1st node 03A8H to 03AFH 59th node setting Same as the 1st node 03B0H to 03B7H 60th node setting Same as the 1st node 03B8H to 03BFH 61st node setting Same as the 1st node 03C0H to 03C7H 62nd node setting Same as the 1st node 03C8H to 03CFH 63rd node setting Same as t...

Page 88: ...set will automatically be read when the END instruction of the PLC CPU is executed Monitors tests the buffer memory and I O signals of the QJ71DN91 In addition auto configuration and parameter backup can be performed Monitor test Model Name Display Node Number Mode Switch Number Bus Error Counter Bus Off Counter H W Test Item Display Area H W Test Result Storing Area Master Function Communication ...

Page 89: ...le utility is being used due to a lack of system resources If this occurs close the intelligent function module utility first and then GX Developer program comments etc and other applications Next restart GX Developer and the intelligent function module utility 4 To start the intelligent function module utility a In GX Developer select QCPU Q mode for the PLC series and specify the project If some...

Page 90: ...I O station set the GX Configurator so that the number of parameter settings of all the intelligent function modules does not exceed the maximum number of parameter settings The total number of parameter settings is calculated separately for the initial setting and for the automatic refresh setting The number of parameter settings that can be set for one module in the GX Configurator DN is as show...

Page 91: ...t Windows 98 Operating System Microsoft Windows Millennium Edition Operating System Microsoft WindowsNT Workstation4 0 Operating System Microsoft Windows 2000 Professional Operating System 1 Install the GX Configurator DN in GX Developer Version 4 or higher in the same language GX Developer English language version and GX Configurator DN Japanese language version cannot be used in combination and ...

Page 92: ...lose the window Tab Moves between controls in the window Ctrl Used in conjunction with the mouse when multiple cells are selected in the selection test Alt Deletes the character where the cursor is positioned When a cell is selected clears all of the setting contents Delete Deletes the character where the cursor is positioned When a cell is selected clears all of the setting contents Back Space De...

Page 93: ...arameter file of the project to be created using GX Developer Program Parameter Project PLC Parameter Network Parameter Intelligent Function Module Parameter b Steps 1 to 3 shown in Figure 6 1 are performed using the following operation 1 Operating from GX Developer Project Open existing project Save project Save project as 2 Operating from the utility parameter setting module selection screen Fil...

Page 94: ...Monitor Test screen Read from module Write to module Text files a Text files can be created by performing the initial setting auto refresh setting or operation of Make text file on the Monitor Test screen The text files can be utilized to create user documents b The text files can be saved in a desired directory QCPU Q25HCPU MODE RUN ERR USER BOOT RS 232 USB A B B A A C Disk A Indicates intelligen...

Page 95: ...ion GX Developer screen Tools Intelligent function utility Start Screen for intelligent function module parameter setting module select Enter Start I O No then select Package name and Module model name See Section 6 3 3 Auto refresh Auto refresh settings screen See Section 6 4 1 ...

Page 96: ...ct monitor test module Monitor Test screen See Section 6 5 Enter Start I O No then select Package name and Module model name 1 Monitor test Select Package name and Module model name Flash ROM settings screen Tools Flash ROM setting Flash ROM settings screen Select See Section 6 6 ...

Page 97: ...ng the module for which monitoring testing is to be performed of the QJ71DN91 can be started Startup procedure Tools Intelligent function Module utility Start Setting screen Explanation of items 1 Startup operation on each screen a Starting auto refresh settings Start I O No Package name Module model name Auto refresh b Monitor Test Module Selection screen Online Monitor test 2 Explanation of scre...

Page 98: ...nction module parameter files Since files cannot be saved using the GX Developer s project save operation save the files using the Parameter Setting Module Selection screen described above 2 Reading writing the intelligent function module parameters from to a PC using the GX Developer a The intelligent function module parameters can be read from and written into the PC after they are saved in a fi...

Page 99: ...Sets the QJ71DN91 s buffer memory that is automatically refreshed For the auto refresh setting items see Section 6 1 Reading and writing with the sequence program will no longer be required by setting auto refresh Startup procedure Start I O No Package name Module model name Auto refresh Setting screen ...

Page 100: ... examples X10 Y120 M16 etc In addition the buffer memory data is stored in 16 point portions starting from the device number that was set For example if X10 is set data will be stored from X10 to X1F 2 Explanation of command buttons Make text file Creates a file containing the screen data in text file format End setup Saves the set data and ends the operation Cancel Cancels the setting and ends th...

Page 101: ...re started from this screen Startup procedure Select monitor test module screen Start I O No Package name Module model name Monitor test The screen can also be started from the GX Developer Version 6 or later system monitor See GX Developer s operating manual for details Setting screen Save Parameter To Flash ROM 1 X Y Monitor Test Parameter Area Monitor Test ...

Page 102: ...15 6 15 MELSEC Q 6 UTILITY PACKAGE GX Configurator DN 1 Each Node Configuration Status Monitor Each Node Communication Status Monitor Each Node Obstacle Status Monitor Down Node Detection Disable Status 2 ...

Page 103: ...ELSEC Q 6 UTILITY PACKAGE GX Configurator DN 2 Message Communication Area Monitor Test Master Function For IO Address Area Monitor Master Function Receive Data Monitor Master Function Transmit Data Monitor Test 3 ...

Page 104: ...6 17 6 17 MELSEC Q 6 UTILITY PACKAGE GX Configurator DN 3 Slave Function Receive Data Monitor Slave Function Transmit Data Monitor Test Auto Configuration Flash ROM Clear 4 ...

Page 105: ...6 18 6 18 MELSEC Q 6 UTILITY PACKAGE GX Configurator DN Parameter Backup 4 Parameters saved in a file can be edited with Flash ROM setting ...

Page 106: ... this utility package all items can be displayed in the display fields Make text file Creates a file consisting of the screen data in text file format Start monitor Stop monitor Selects whether or not the current values are monitored Execute test Performs a test on the selected items To select more than one item select them while holding down the Ctrl key Close Closes the screen that is currently ...

Page 107: ...rpose of Setting The contents of flash ROM settings are edited offline The edited parameters can be written into the module on the Parameter Backup screen of Monitor Test Startup procedure Flash ROM Setting screen Package name Module model name Select Setting screen Parameter Backup ...

Page 108: ...Displays the parameter names Setting value Enter or select the value to be set in the flash ROM 2 Explanation of the command buttons File save Saves the parameters in the hard disk etc File read Reads the parameters saved in the hard disk etc Close Closes the screen that is currently open and returns to the previous screen ...

Page 109: ...a sequence program Refresh processing request I O communication read processing I O communication write processing 2 Perform the reading of reception data and the writing of transmission data only when there is no error in the module and the module is in the ready status Program for communication X0F X0 Module error Module ready 3 Create a program that detects the communication status of each node...

Page 110: ...utput data is assigned to Y100 to Y14F 4 Each node s communication status is stored in M101 to M104 5 When an error occurs the system reads that error information into D500 then stores the node number of the error causing node into D501 and the error code into D502 separately 6 The attribute data for message communication write is set in D30 7 It is assumed that the QJ71DN91 master node is mounted...

Page 111: ... 704H 705H 706H X110 to X14F FROM FROM X160 to X16F FROM Reception data 900H Node No 2 transmission Node No 4 transmission Node No 3 transmission 901H 902H 903H 904H 905H Transmission data Y100 to Y107 TO Y110 to Y14F TO I00 to I07 Input 00 to input 07 Remote I O node No 3 16 point input Transmission data Reception data Status I00 to I15 Input 00 to input 15 Dummy output Remote I O node No 2 8 poi...

Page 112: ...sage group to 3 Sets the connection type of the first slave node to polling Input byte module 1 output byte module 0 Input word module 0 output word module 0 Input double word module 0 output double word module 0 Expected packet rate default 500 ms Watchdog timeout action default timeout Production inhibit time default 10 ms Sets the station number of the second slave node to 2 and the message gro...

Page 113: ...ction default Auto delete Production inhibit time default 20 ms Sets the node number of the fourth slave node to 3 and the message group to 3 Sets the connection type of the fourth slave node to bit strobe Input byte module 4 output byte module 2 Input word module 0 output word module 0 Input double word module 0 output double word module 0 Expected packet rate default 500 ms Watchdog timeout acti...

Page 114: ...l configuration Maximum detection station number 4 Auto configuration request Checks auto configuration in progress Checks the completion of auto configuration Resets the auto configuration request 7 3 3 Saving parameters in flash ROM The following explains a method for saving parameters in flash ROM Once parameters are saved it is not necessary to save them again until they are changed Parameter ...

Page 115: ...t data processing program Node No 2 error handling program Node No 2 output data processing program Node No 4 error handling program Node No 4 input data processing program Node No 4 output data processing program Node No 3 error handling program Node No 3 input data processing program Parameter setting program See Section 7 3 Sets the initial setting value of transmission data I O communication s...

Page 116: ... attribute ID are different depending on the slave node Therefore refer to the applicable manual of the slave node Attribute read command Attribute read command Attribute read command Reads the master communication status Executes attribute read if the master communication status is either C0H or 40H Sets the attribute read command Slave station of station No 3 class ID 1 Instance ID 1 Attribute I...

Page 117: ...fer to the applicable manual of the slave node Attribute write command Attribute write command Attribute write command Sets write data in D30 Sets the attribute write command Slave station of station number 3 class ID 1 Instance ID 1 Byte length of transmission data 1 attribute ID 3 Writes request data into the buffer memory Sets the message communication request Resets the message communication r...

Page 118: ...s section explains an example of a sequence program that obtains the error information for the master function Error reset Reads the error code from the buffer memory Number of station in which an error has occurred Error information Error code Sets the error reset request Resets the error reset request ...

Page 119: ...ea of node No 1 64 points Transmission data area of node No 1 64 points X200 to X207 X208 to X23F For future expansion X240 to X27F For future expansion X2E0 to X2FF For future expansion X280 to X2BF X2C0 to X2DF Y200 to X23F For future expansion Y240 to X247 Y248 to X27F For future expansion Y2D0 to X2FF For future expansion Y280 to X2BF Y2C0 to X2CF D1000 to D1251 I O address information 700H 70...

Page 120: ...setting program See Section 7 3 Starts I O communication Reads the I O address area information Reads the reception data according to the I O address area information Writes the transmission data according to the I O address area information I O communication start command Parameter setting program Controls based on the reception data that has been read ...

Page 121: ...is executed 8 1 System Configuration The programs explained in this chapter are based on the following system configuration 1 The reception data is allocated from X200 to X27F and the transmission data is allocated from Y200 to Y27F 2 If an error occurs the error information is read to D500 3 It is assumed that the QJ71DN91 slave node is mounted in slot 0 of the basic base ...

Page 122: ...an example of a sequence program for setting parameters Command for setting parameters for the slave function I O communication start command Command for setting parameters for the slave function Sets the number of reception bytes to 16 bytes Sets the number of transmission bytes to 16 bytes Writes the parameter data into the buffer memory ...

Page 123: ...ce program that performs I O communication with the master node Parameter setting program I O communication start command Input data processing program Output data processing program Parameter setting program See Section 8 2 Sets the initial setting value of transmission data I O communication start request Reads reception data Writes transmission data ...

Page 124: ...ining Error Information This section explains an example of a sequence program that obtains the error information for the slave function Error reset Error handling program Reads the error code from the buffer memory Resets the error reset request Sets the error reset request ...

Page 125: ...r while using the QJ71DN91 as well as their troubleshooting procedures This chapter consists of the following two sections Section 9 1 Items to Check When an Error Occurs Shows troubleshooting procedures based on the phenomenon of errors Section 9 2 Error Codes Shows the action to be taken based on the error codes ...

Page 126: ...the communication speed uniform in the entire network Is a terminal resistor installed at both ends of the trunk line Check the error code If all of the above check items are normal check the entire network status such as noise and installation Is the ERR LED lit Turn ON the I O communication request Y11 Is the NS LED flashing in red An I O communication error has occurred with one or more slave s...

Page 127: ...N Turn ON the network power Is the communication speed the same in all stations Set the same communication speed in all stations Is a terminal resistor connected Are there any duplicate slave station numbers with the QJ71DN91 Set non duplicate station numbers Are the parameters written Do the created parameters match with the hardware configuration of the actual slave station Create and write corr...

Page 128: ...e all node numbers unique Set non duplicate node numbers Is the slave node set in a parameter Is the actual node number the same as the node number in a parameter Is a reserved node not set Does the specified connection type match with the slave node specification Do the UCMM presence and message group match with the slave node specification Does the setting value of the watchdog timeout action ma...

Page 129: ...nodes Is a terminal resistor connected Are there any duplicate slave station numbers with the QJ71DN91 Set non duplicate node number Does the number of I O points of the slave function match with the parameter setting of the master station Turn ON the network power Set the same communication speed in all nodes Connect a terminal resistor Yes Match the number of I O points with that of the master s...

Page 130: ...ge The value of the mode switch is out of range Set the local node number between 0 and 63 Set the mode switch to other than D and E 39H QJ71DN91 Two or more nodes that have the same node number MAC ID exist in the network Set non duplicate node numbers E0H QJ71DN91 Network power is not being supplied Supply the network power 24V DC E1H QJ71DN91 Other modules are not found in the network Connect o...

Page 131: ...ters 0FH QJ71DN91 Flash ROM all clear error Clear all parameters again Do not turn OFF the power or reset while clearing all parameters 10H QJ71DN91 The number of input points per slave node has exceeded 256 bytes Correct the number of input points per slave node to 256 bytes or less 11H QJ71DN91 The number of output points per slave node has exceeded 256 bytes Correct the number of output points ...

Page 132: ... resistor is disconnected 29H Slave node Connection has already been established with that slave node Wait a while and reset the slave node if the connection cannot be established 2AH QJ71DN91 The data length of a polling response is different from the data length read from the slave node when establishing a connection Check the entire network and slave node statuses such as whether or not a termi...

Page 133: ...tus that is requested by the service Check whether or not the specified MAC ID class ID instance ID and attribute ID are correct Verify the current status by reading attributes Referring to the slave node manual check the condition under which the slave node notifies this error and take an appropriate action 12 Slave node The object cannot execute the requested service in the current mode status C...

Page 134: ...inal resistor is disconnected 55 QJ71DN91 The specified slave node number is other than 0 to 63 Specify a slave node number between 0 and 63 57 QJ71DN91 The sequence of the division reception is invalid Check the entire network and slave node statuses such as whether or not a terminal resistor is disconnected 257 QJ71DN91 The data length set in the buffer memory is 241 or more Set the data length ...

Page 135: ...eloper system monitor the error codes and LED illumination status can be verified a Setting procedure Select the module by clicking Diagnostics System Monitor and then click Module s is Detailed Information H W Information b Product information Displays the function version and serial No as shown below 030520000000000 B Function version B Serial No first 5 digits 03052 ...

Page 136: ...RR LED on status MS RED Indicates the MS red LED on status MS GREEN Indicates the MS green LED on status NS RED Indicates the NS red LED on status NS GREEN Indicates the NS green LED on status d H W SW Information Displays the switch setting status of the QJ71DN91 NA Displays the node number setting status MODE Displays the mode switch status ...

Page 137: ...lowing figure shows an external dimension diagram of the QJ71DN91 QJ71DN91 RUN MS NS ERR NODE ADDRESS X10 X1 MODE DR 0 M 125 1 M 250 2 M 500 3 S 125 4 S 250 5 S 500 6 D 125 7 D 250 8 D 500 M O D E QJ71DN91 1 2 3 4 5 6 78 9 0 A B C D E F 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 27 4 90 98 12 ...

Page 138: ...I O points of the DeviceNet master function Input 4096 points output 4096 points Input 2048 points output 2048 points Auto configuration function Available Not available Auto refresh function with CPU Available requires GX Configurator DN Not available Constant scan Available Not available Hardware test communication test function Available Not available Parameter setting method 3 types Setting wi...

Page 139: ...nt Double word module count of the nth slave node Lower byte Input double word module count 01DCH 1 8 Both are in double word unit Expected packet rate of the nth slave node Communication watchdog timer value for slave node ms 01DDH 1 8 Set the communication watchdog timer value for a slave node When communication between the master node and the first slave node is interrupted for the period of ti...

Page 140: ...dress Remark Setting value Setting area for the number of slave function input points 0 to 128 bytes 060EH Sets the I O data reception size for the slave function parameters Setting area for the number of slave function output points 0 to 128 bytes 060FH Sets the I O data transmission size for the slave function parameters ...

Page 141: ...H8 00H 02H 00H 00H 00H 00H 30ms K31 Timeout H1 25ms K26 Yes 3 1794 IB16 Flex I O input module 02H 02H 00H 00H 00H 00H Rockwell Automation Japan Co Ltd 1794 OB16 Flex I O output module 02H 02H 00H 00H 00H 00H DRT1 ID08 CompoBus D 8 point input Polling H1 bit strobe H2 00H 01H 00H 00H 00H 00H 1000ms K1001 Timeout H1 10ms K11 No DRT1 ID16 CompoBus D 16 point output Polling H1 bit strobe H2 00H 02H 00...

Page 142: ...munication Adapter Device ProdTypeStr Communication Adapter Communication Adapter Device ProdCode 4 MajRev 1 MinRev 1 ProdName QJ71DN91 Catalog I O Characteristics Section IO_Info Default 0x0001 Poll Only PollInfo 0x0001 1 Default Input Input1 1 Default Output Output1 Input Connections Input1 Input Producing 8 8 byte 0 0 bits are significant 0x0001 Poll Only Connection Input Data Name 6 Path Size ...

Page 143: ...App 7 App 7 MELSEC Q APPENDIX MEMO ...

Page 144: ...e 3 38 External dimension diagram App 1 F Function version 2 4 G GX Configurator DN 2 4 6 1 GX Developer 2 4 H H W test completion 3 22 H W test error detection 3 22 H W testing 3 22 H W test item display area 3 44 H W test result storing area 3 44 I I O communicating 3 14 I O communication request 3 14 I O communication with the master node 8 3 I O communication with the slave nodes 7 7 I O signa...

Page 145: ...mpletion 3 19 3 20 Save parameter to flash ROM request 3 19 3 20 Saving parameter to flash ROM 3 19 3 20 Scan time 3 49 Setting area of the number of slave function transmission bytes 3 42 Setting area of the number of slave function 3 42 Setting parameters master function 7 4 Setting parameters slave function 8 2 Slave function I O communication function 3 11 Slave function for error set signal 3...

Page 146: ... production 1 Mitsubishi shall accept onerous product repairs for seven 7 years after production of the product is discontinued Discontinuation of production shall be notified with Mitsubishi Technical Bulletins etc 2 Product supply including repair parts is not possible after production is discontinued 3 Overseas service Overseas repairs shall be accepted by Mitsubishi s local overseas FA Center ...

Page 147: ...he United States and other countries Pentium is a registered trademark of Intel Corporation in the United States and other countries Other company and product names herein are either trademarks or registered trademarks of their respective owners SPREAD Copyright c 1998 FarPoint Technologies Inc ...

Page 148: ...OWER Z 14F HARUMI CHUO KU 104 6212 JAPAN NAGOYA WORKS 1 14 YADA MINAMI 5 HIGASHI KU NAGOYA JAPAN MODEL MODEL CODE QJ71DN91 U S E 13JR32 SH NA 080143 C 0202 MEE DeviceNet Master Slave Module When exported from Japan this manual does not require application to the Ministry of Economy Trade and Industry for service transaction permission ...

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