Mitsubishi Electric MELSEC Q Series User manual

Web Server Module User's Manual
-QJ71WS96

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SAFETY PRECAUTIONS
(Always read these instructions before using this equipment.)
Before using this product, please read this manual and the relevant manuals introduced in this manual
carefully and pay full attention to safety to handle the product correctly.
Note that these precautions apply only to this product. Refer to the user's manual of the CPU module for
the programmable controller system safety precautions.
In this manual, the safety instructions are ranked as " WARNING " and " CAUTION".
WARNING
CAUTION
Indicates that incorrect handling may cause hazardous conditions,
resulting in death or severe injury.
Indicates that incorrect handling may cause hazardous conditions,
resulting in medium or slight personal injury or physical damage.
Note that the !CAUTION level may lead to a serious consequence according to the circumstances.
Always follow the instructions of both levels because they are important to personal safety.
Please save this manual to make it accessible when required and always forward it to the end user.
[Design Precautions]
! WARNING
 When controlling a running programmable controller (e.g. modifying data), establish an interlock
circuit in a sequence program for safety of the overall system.
Also, be sure to read the manual carefully and ensure safety before making controls such as
change of operation status.
Especially, when controlling a programmable controller from a remote location via the Internet,
problems on the programmable controller side may not be dealt with promptly due to abnormal
data communication.
Establish an interlock circuit in a sequence program.
 For the operation status of each station in the event of a communication error in the station, see
the manual for each station.
Failure to do so can cause an accident due to false output or malfunction.
 When the e-mail function is utilized, it may take time to send e-mail or is disabled depending on
the status of the send server, transmission path, receive server and/or receive device.
To ensure the safety of the programmable controller system, provide calling circuits using lamps
and buzzers.
 Provide a safety circuit outside the programmable controller so that safety of the whole system
can be ensured against an external power failure or programmable controller failure.
Failure to do so may cause an accident due to false output or malfunction.

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[Design Precautions]
! WARNING
 Do not write any data into the "System area" of the buffer memory of the intelligent function
module.
Also, do not output (turn on) the "Use prohibited" signal, which is one of the output signals from
the programmable controller CPU to the intelligent function module.
If data is written to the "System area" or the "Use prohibited" signal is output, there is a risk that
the programmable controller system may malfunction.
[Design Precautions]
! CAUTION
 Do not bunch the control wires or communication cables with the main circuit or power wires, or
install them close to each other.
They should be installed 100 mm (3.94 inch) or more from each other.
Not doing so could result in noise that would cause erroneous operation.
 Do not power off a station where this module is mounted and do not reset the programmable
controller CPU while storing the settings into the standard ROM of the module using a Web
browser.
This may make the data unstable within the standard ROM and require resetting and re-storing,
or it may cause a failure or malfunctions of the module.
[Security Precautions]
! WARNING
 To maintain the security (confidentiality, integrity, and availability) of the programmable controller
and the system against unauthorized access, denial-of-service (DoS) attacks, computer viruses,
and other cyberattacks from external devices via the network, take appropriate measures such
as firewalls, virtual private networks (VPNs), and antivirus solutions.

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[Installation Precautions]
! CAUTION
 Use the programmable controller in the environment specified in the user's manual of the CPU
module.
Using this programmable controller in an environment outside the range of the general
specifications could result in electric shock, fire, erroneous operation, and damage to or
deterioration of the product.
 While pressing the installation lever located at the bottom of module, insert the module fixing tab
into the fixing hole in the base unit until it stops. Then, securely mount the module with the fixing
hole as a supporting point.
Incorrect loading of the module can cause a malfunction, failure or drop.
When using the programmable controller in the environment of much vibration, tighten the
module with a screw.
 Completely turn off the externally supplied power used in the system before mounting or
removing the module.
Not doing so could result in damage to the product.
 Tighten the screw in the specified torque range.
Undertightening can cause a drop, short circuit or malfunction.
Overtightening can cause a drop, short circuit or malfunction due to damage to the screw or
module.
 Do not directly touch the module's conductive parts or electronic components.
Touching the conductive parts could cause an operation failure or give damage to the module.

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[Installation Precautions]
! CAUTION
 For connector wiring, correctly press, pressure-weld or solder the connecting part by using the
tool specified by the manufacturer.
Poor connection may cause short circuits, fires or malfunctions.
 Be sure to set the CompactFlash card by pressing it into the CompactFlash card slot. Confirm it
is completely set.
Poor contact may lead to malfunctions.
[Wiring Precautions]
! CAUTION
 Be sure to fix communication cables and power cables to the module by ducts or clamps.
Failure to do so may cause damage of the module or the cables due to accidental pull or
unintentional shifting of the cable, or malfunctions due to poor contact of the cables.
 Connect the connectors to the module securely.
 Tighten the terminal screws with the specified torque.
If the terminal screws are loose, it could result in short circuits, fire, or erroneous operation.
Tightening the terminal screws too far may cause damages to the screws and/or the module,
resulting in fallout, short circuits, or malfunction.
 Do not hold the communication cable by hand when pulling it out from the module.
Be sure to hold the connector by hand, when removing the cable with a connector from the
module.
Failure to do so may cause malfunctions or damage to the module or cable.
 Be sure there are no foreign substances such as sawdust or wiring debris inside the module.
Such debris could cause fires, damage, or erroneous operation.
 The module has an ingress prevention label on its top to prevent foreign matter, such as wire
offcuts, from entering the module during wiring.
Do not peel this label during wiring.
Before starting system operation, be sure to peel this label because of heat dissipation.
[Startup/Maintenance Precautions]
! WARNING
 Do not touch the terminals while the power is on.
Doing so may cause malfunctions.
 Before cleaning up and retightening terminal screws and module mounting screws, be sure to
shut off all phases of external power supply used by the system.
Failure to do so can cause the failure or malfunctions of module.
Loose tightening may cause a fall, short-circuits, or malfunctions of the module.
Overtightening may damage the screws and module and cause a fall, short-circuits, or
malfunctions of the module.

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[Startup/Maintenance Precautions]
! CAUTION
 Never disassemble or modify the module.
This may cause failure, malfunctions, injuries or a fire.
 Before mounting/dismounting the module, be sure to shut off all phases of external power supply
used by the system.
Failure to do so may cause failure or malfunctions of the module.
 Do not mount/remove the module onto/from base unit more than 50 times (IE C61131-2
compliant), after the first use of the product.
Failure to do so may cause the module to malfunction due to poor contact of connector.
 Do not drop the battery installed to the module, and do not give it a shock.
Doing so may damage the battery, causing battery fluid leakage in the battery.
If the battery has been dropped or given a shock, do not use it but dispose of it.
 Always make sure to touch the grounded metal to discharge the electricity charged in the body,
etc., before touching the module.
Failure to do so may cause a failure or malfunctions of the module.
[Operating Precautions]
! WARNING
 Before controlling a running programmable controller (e.g. modifying data), fully ensure safety.
 Do not write any data into the "System area" of the buffer memory of the intelligent function
module.
Also, do not output (turn on) the "Use prohibited" signal, which is one of the output signals from
the programmable controller CPU to the intelligent function module.
If data is written to the "System area" or the "Use prohibited" signal is output, there is a risk that
the programmable controller system may malfunction.
[Disposal Precautions]
! CAUTION
 Dispose of this product as industrial waste.
When disposing of batteries, separate them from other wastes according to the local
regulations.
(For details of the battery directive in EU member states, refer to Appendix 9.)
[Transportation Precautions]
! CAUTION
 When transporting lithium batteries, make sure to treat them based on the transport regulations.
(Refer to Appendix 8 for details of the controlled models.)

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 CONDITIONS OF USE FOR THE PRODUCT 
(1) MELSEC 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 ELECTRIC 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 ELECTRIC USER'S, 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;
• Nuclear 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.
• Railway 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.
• Aircraft 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 Electric 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 Electric 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 Electric representative in your region.
(3) Mitsubishi Electric shall have no responsibility or liability for any problems involving programmable controller trouble and
system trouble caused by DoS attacks, unauthorized access, computer viruses, and other cyberattacks.

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REVISIONS
* The manual number is given on the bottom left of the back cover.
Print Date * Manual Number Revision
Dec., 2002 SH (NA)-080320E-A First Printing
Apr., 2003 SH (NA)-080320E-B Correction
Operating Instructions, Section 4.9.1, Section 9.1 (1)(9)
Addition
Section 4.9.2
Nov., 2003 SH (NA)-080320E-C The whole manual was reexamined with the enhancement of the Web
server module functions.
Refer to Appendix 5 for the enhancement of the Web server module
functions.
Apr., 2005 SH (NA)-080320E-D Correction
SAFETY PRECAUTIONS, Operating Instructions, Section 2.4 (1), 2.5 (1),
Section 3.1 (2), Section 4.9.1, Section 6.3.3 REMARKS, 6.4.4
REMARKS, Section 7.2, Section 9.1 (5), 9.3 (064Ch), Appendix 5.2 (2)
Addition
Section 7.2.6, Section 9.3 (0B07h, 0B08h, 0B09h), Appendix 5.1 (2),
Appendix 7
Sep., 2006 SH (NA)-080320E-E Correction
SAFETY PRECAUTIONS, Generic Terms and Abbreviations, Section
2.1, 2.4, 2.5, Section 3.1, 3.6.1, 3.6.2, 3.8.6, 3.8.7, 3.8.9, Section 4.6.3,
4.6.5 to 4.6.7, 4.7, 4.8.3, 4.9.2, 4.10.1, 4.10.3, 4.11, 4.12, Section 6.4.4,
6.6.4, 6.7.4, 6.7.5, Section 8.1 to 8.10, Section 9.2.1, Appendix 1
Jan., 2007 SH (NA)-080320E-F Correction
Operating Instructions, Generic Terms and Abbreviations, Section 2.1,
2.5, Section 3.4, 3.7, Section 4.6.7, Section 6.3.3, Section 8.1,
Section 9.1, 9.3, Appendix 2, 5.1
Apr., 2007 SH (NA)-080320E-G Change of a term
"PLC" was changed to "programmable controller".
Correction
Generic Terms and Abbreviations, Section 2.1, 2.5, Section 4.6.7,
Section 6.2.1, 6.3.3, 6.4.4, Section 8.2 to 8.10, Section 9.3, Appendix 2,
Appendix 5.1, Appendix 6.5
Jan., 2008 SH (NA)-080320E-H Correction
Operating Instructions, Generic Terms and Abbreviations, Packing List,
Section 2.1, 2.4, 3.1, 3.2, 3.6.2, 3.7, 4.1, 4.6.7, 4.9.1, 7.2.4, 9.1, 9.3,
Appendix 1, Appendix 2, Appendix 5.1, Appendix 6.5
Sep., 2008 SH (NA)-080320E-I Correction
SAFETY PRECAUTIONS, Operating Instructions, Compliance with the
EMC and Low Voltage Directives, Generic Terms and Abbreviations,
Section 2.1, 2.4, 2.5, 3.1, 3.8.6, 4.1, 4.9.2, 4.10.1, 4.10.3, 8.2 to 8.10, 9.1,
9.3, Appendix 2, Appendix 5.1
Addition
Appendix 9

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* The manual number is given on the bottom left of the back cover.
Print Date * Manual Number Revision
May, 2009 SH (NA)-080320E-J Correction
Generic Terms and Abbreviations, Section 2.1, 2.4, 2.5, 3.1, 4.3, 4.5,
4.6.3, 4.10.2, 6.2.7, 6.6.3, 9.1,9.2.2,9.3, Appendix 1, Appendix 2,
Appendix 5.1, Appendix 6.10
Nov., 2009 SH (NA)-080320E-K Correction
SAFETY PRECAUTIONS, Operating Instructions, 3.1, 4.5, 4.7, 4.10.3,
6.2.7, 6.8, 6.11.3, 9.1
Addition
CONDITIONS OF USE FOR THE PRODUCT
Feb., 2012 SH (NA)-080320E-L Correction
OPERATING INSTRUCTIONS, COMPLIANCE WITH EMC AND LOW
VOLTAGE DIRECTIVES, GENERIC TERMS AND ADDREVIATIONS,
Section 2.1, 2.4, 2.5, 3.1, 3.2, 4.5, 4.6.7, 4.8.2, 4.9.1, 6.2.5, 6.2.7, 6.3.3,
6.7.1, 6.10.1, 6.10.3, 9.1, 9.3, Appendix 2, Appendix 5.1, Appendix 5.2,
Appendix 6.5
Dec., 2012 SH (NA)-080320E-M Correction
OPERATING INSTRUCTIONS, GENERIC TERMS AND
ADDREVIATIONS, Section 2.1, 3.1, 4.5, 4.8.1, 4.8.3, 4.13, 6.2.7, 6.4.4,
9.1, 9.3, Appendix 2, Appendix 5.1
Oct., 2013 SH (NA)-080320E-N Correction
GENERIC TERMS AND ADDREVIATIONS, Section 2.1, 3.1, 3.2,
Appendix 2, Appendix 5.1
Jun., 2014 SH (NA)-080320E-O Correction
OPERATING INSTRUCTIONS,
GENERIC TERMS AND ADDREVIATIONS, Section 2.1, 3.1, 3.7, 3.8.2,
3.8.3, 4.6.7, 6.2.4, 6.2.5, 6.3.3, 6.4.2, 6.5.3, 6.7.2, 8.9, 9.1, 9.3,
Appendix 2, Appendix 5.1, Appendix 5.2, Appendix 6.5
Dec., 2014 SH (NA)-080320E-P Correction
OPERATING INSTRUCTIONS, Section 2.4, 6.3.3, 9.1, 9.3, Appendix 2
Feb., 2015 SH (NA)-080320E-Q Correction
Section 4.10.1
Mar., 2017 SH (NA)-080320E-R Correction
GENERIC TERMS AND ADDREVIATIONS, Section 2.2, 2.5, 3.1
Dec., 2020 SH (NA)-080320E-S Correction
SAFETY PRECAUTIONS, CONDITIONS OF USE FOR THE PRODUCT,
Section 4.9.2
Japanese Manual Version SH-080319-V
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.
 2002 MITSUBISHI ELECTRIC CORPORATION

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OPERATING INSTRUCTIONS
This section explains the precautions in the following order.
1) Precautions for network connection
2) Precautions for performance/specifications
3) Precautions for security
4) Precautions for tag function
5) Precautions for logging function
6) Precautions for user screen creating function
7) Precautions for other functions
8) Precautions for access to Web server module
9) Precautions for battery
10) Precautions for using CompactFlash card
11) Precautions for using redundant system
12) Precautions for using multiple CPU system
13) Precautions for using Java 7
14) Precautions for using dedicated instructions
Precautions for network connection
(1) Infrastructure for Internet connection
For devices applicable to the Web server module for the Internet connection or
Internet service providers, refer to Section 2.4.
Note that Internet connection of the Web server module may not be available in
some regions or in some countries depending on the Internet infrastructure.
In this case, please consult your local Mitsubishi representative.
(2) Connection to mail server or FTP server
Powering on the programmable controller immediately after powering it off may
cause failure to connect to the mail server or FTP server. After powering it off,
wait for several minutes before turning it on.
Precautions for performance and specifications
(1) Performance of the Web server module and the system using the Web server
module.
Performance of the Web server module and the system using the Web server
module differs depending on the following factors.
Conduct verification by user prior to starting the system.
• Operating environment (personal computer, network, and the CompactFlash
card)
• Loading status of the network
• Sequence scan time
• Accessing status from a personal computer, terminal display, or intelligent
function module to the programmable controller CPU.
• Accessing status of the Web server module from outside.
• Settings of the Web server module
(2) Number of writes to standard ROM (flash ROM)
Data can be written to the same area of a standard ROM up to 100,000 times, and
there are some write restrictions (standard ROM drive life).
Refer to Section 3.1 REMARKS (1) for the life of the standard ROM drive and how
to check the used condition.

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(3) Time handled by Web server module (Refer to Section 3.9)
Transfer delay may occur since the Web server module acquires the clock data
from CPU No.1 at the following timings.
• When the programmable controller is powered off and then on or CPU module is
reset
• Once per minute
Precautions for security
(1) Security of the Web server module
The Web server module supports the basic authentication (account setting) by the
user name and password and the IP filter function, however, it does not prevent all
of illegal access from the outside.
Preventive measures must be taken by users against illegal access to ensure the
programmable controller system safety. (Refer to Section 4.6.5 (3))
(2) Remote password function of QCPU
The remote password function of the QCPU is not used for the Web server
module.
When restricting access to the QCPU, use the user authentication function of the
Web server module.
Precautions for tag function
(1) Tag setting and component setting (Refer to Section 6.3.3)
(a) When a component setting is deleted, the settings of the components after
the deleted setting No. are shifted up.
When the component has been set in the user part of the user screen creation
function, reexamine the parameters since the setting No. is changed. (Refer to
Chapter 7 for user part details.)
(b) If a component has a wrong device number in the component setting, the
other component that will obtain the device of the same access target CPU
will result in an error. Check the device number set in the component setting.
(c) If the data type is set as "String" in the component setting, device values
may be replaced.
(2) Tag sampled at high speed
(a) Be sure to create a user-set system area in the program memory of the
control CPU. (Refer to Section 6.3.3 REMARKS.)
(b) "Sampling: High speed" can be registered to only one tag. (Multiple setting is
not allowed)
(c) The access target CPU of the tag component selected to execute "Sampling:
High speed" is the access target CPU setting No. 1 (control CPU). (Fixed)
(d) Total points of 96 or less can be set for the devices of the tag component
selected to execute "Sampling: High speed".

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Precautions for logging function
(1) Logging setting (Refer to Section 6.4.4)
(a) When the logging file storage has been set to the standard ROM, pay
attention to the free user area of the standard ROM or the number of writes
to standard ROM.
(b) E-mail transmission/File transfer requires several to several tens of seconds
depending on the network line and data size.
Depending on the logging setting, the target file may be deleted before e-mail
transmission or file transfer is completed.
Examine the settings, such as the timing, file capacity and number of saved
files to increase the time to file deletion.
(2) High-speed logging
(a) Be sure to create a user-set system area in the program memory of the
control CPU. (Refer to Section 6.3.3 REMARKS.)
(b) A delay may occur in the logging interval depending on the scan time of the
control CPU and the time of access from a peripheral device/intelligent
function module to the programmable controller CPU.
Precautions for user screen creating function
(1) User parts
(a) Be sure to set the must-be-set parameters of the user parts.
Failure to do so will result in an error.
(b) The file names and parameters of the user parts are not case sensitive.
(c) When the contents of a user screen have been changed, delete the
temporary Internet files (cache), and then read the user screen on the Web
browser.
(Refer to Section 6.2.7 (1) for how to delete the temporary Internet files.)
(d) The device value corresponding to the tag component specified in the user
parts parameter must be retained for a time longer than the tag collection
interval and communication time in the sequence program.
(Especially, be careful when accessing the user screen via the Internet.)
When the retention time of the device value is too short, value change may
not be displayed in user parts accurately.
(2) Sample screens
Sample screens for the user parts are available in the /ROM/WWW/USER/
directory of the Web server module.
Delete all sample screen files before starting actual operation. (To prevent write
to the devices using the sample screens)
The sample screens can be restored by initializing the module. (Refer to Section
4.13.)

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(3) Windows R 8.1
When displaying the user screen, set any of the following (a) or (b).
(a) Select [Tool] - [Compatibility View settings] on the Internet Explorer R, and
register the URL of the Web server module.
(b) Add the following text between <head> and </head> in the source of the
created user screen.
<meta http-equiv="x-ua-compatible" content="IE=EmulateIE9">
Precautions for other functions
(1) Account setting (Refer to Section 4.6.5)
After completion of initial setting, make sure to register at least one account with
administrator authority, and then connect to the network.
(2) IP filter setting (Refer to Section 4.6.6)
(a) When using a mail server, FTP server, DHCP server, DNS server and/or
router, do not block the IP packets of these devices.
To do so will disable communication with the above devices.
(b) When a proxy server exists on the LAN, block the IP address of the proxy
server. If the IP packet from the proxy server is passed, access to the Web
server module is available from a personal computer that can access the
proxy server regardless of the other setting.
(c) When accessing the Web server module from a personal computer on the
LAN, do not use the proxy server.
(3) Access target CPU setting (Refer to Section 4.6.7)
(a) Web server module requires preparatory time to communicate with the
access target CPU when the "Update" button on the Setting update screen is
clicked, the programmable controller is powered off and then on, or the CPU
module is reset. Therefore, it may take several minutes before the
communication will be available if many access target CPUs are set.
Confirm that the setting update has been completed or the Web server
module has been ready (X0 is on), and make access from the personal
computer to the Web server module.

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(b) Carefully set the "PLC series" of the access target CPU setting.
A wrong "PLC series" setting will generate an error in the programmable
controller CPU or module on the route to the access target CPU, and a
response time-out error (error code: 0002h) is displayed on the Web server
module.
(4) Event setting (Refer to Section 6.5.3)
When the display form of the component is set to "Exponential" in the tag event
setting, a rounding error is produced in the range outside the number of digits
set in the number of decimal places.
Hence, when the exponential form component is set in the tag event setting, an
event may not be detected correctly.
Refer to Section 6.5.3 (3) for the tag event setting.
(5) Access log function (Refer to Section 6.8)
Depending on the version of the Java VM, HTTP login access may be registered
every time communication occurs.
This access log registration can be inhibited by "Intelligent function module switch
setting". (Refer to Section 4.7.)
(6) Data management function (Refer to Section 6.10)
(a) Backup
Do not alter the backup data (files under "\BACKUP\"). Using the altered
backup data can cause the module to fail or malfunction.
(b) Restore
Check that the functions set to data stored on the CompactFlash card are
supported by the destination Web server module. (Refer to Appendix 5.1.)
Functions that have been added/changed by the upgrade of the Web server
module cannot be used with a module of old version.
(7) CSV export/import function (Refer to Section 6.10.3)
(a) When editing the setting information file, be sure to use the CSV-exported
setting information file. The user should not create a new setting information
file.
(b) CSV-import the setting information file in the procedure given in Section
6.10.3 (3).
(c) While CSV export/import is being executed in the data management, do not
switch power from on to off, reset the CPU module, or perform management
menu operation.
To do so can cause the setting information file to be corrupted or cleared.
(d) As the setting information file includes the password and other important
information and its information may be obtained illegally, delete the file from
the standard ROM or CompactFlash card after the setting is completed.
(e) Set functions supported by the Web server module used for the setting
information file. If set functions are not supported, they cannot be used.
(Refer to Appendix 5.1.)

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(8) Web screen printing
Do not use the print function of a Web browser. Depending on the version of Java
VM, the Web browser may display "No response".
To print a Web screen, take a screen shot, paste it on graphics editing software
and print it by using the print function on the software.
Precautions for access to Web server module
(1) Monitor screen and user screen
(a) Since the monitor screens and user screen use the Java applet, Java VM is
required for the Web browser to execute the applet.
Refer to Section 3.1 REMARKS (2) and (3).
(b) Displaying each monitor screen and user screen may take a little while.
When displaying a monitor or user screen on the Web browser, wait for
several seconds after it is fully displayed, and then perform screen switching or
update.
(c) If communication is interrupted due to some reason while monitoring the
system from a monitor or user screen, or if monitoring is executed before
connecting the Web server module to the network, the monitor or user
screen may not be correctly displayed on the Web browser even after
restoration or restart of communications.
(d) If communication is interrupted while monitoring the system from the monitor
screen, the monitor screen may not be displayed normally even after
communication is restored.
(e) When using the Web server module in a local area, make setting in Local
Area Network (LAN) Settings of the Web browser so that the proxy server is
not used for the local address.
Refer to Section 4.5 (3).
(f) Values and states displayed on monitor and user screens may have been
delayed.
Also, when more than one Web browser has been activated, the display
timing varies among them.
(g) Select any other than "Never" for "Check for newer versions of stored pages"
in the temporary Internet files settings of the Web browser.
If "Never" is set, the old screen (the one saved in the temporary Internet
files) is displayed unchanged when the file is read from the Edit screen, etc.
Refer to Section 4.5 (3).
(h) The old screen (the one saved in the temporary Internet files) may be
displayed unchanged if read is performed on the monitor screen and user
screen, etc. In that case, delete the temporary Internet files (cache) of the
Web browser and read it again.
Refer to Section 4.5 (3).
(i) In the security level setting of the Web browser, set the security level of the
Internet and Intranet zones to "Default Level".
Refer to Section 4.5 (3).
(j) In the advanced settings of the Web browser, set to "Restore Defaults".
Refer to Section 4.5 (3). ( )
When using Microsoft® VM, clear the "JIT compiler for virtual machine
enabled [requires restart]" check box.

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(k) When displaying the standard screen using an operating system and a Web
browser of English version, do not click the "Japanese" button, which jumps
the page to the Japanese standard screen, on the TOP page in the standard
screen. Doing so may display an incorrect screen.
Doing so may display an incorrect screen.
(l) When displaying the standard screen of English version using an operating
system and a Web browser of Japanese version, words and phrases used
by the operating system (e.g. the "Cancel" button to a confirmation message)
are displayed in Japanese.
(m) Do not use the following functions of Internet Explorer®.
• Quick Tabs
• "Open in New Tab"
• "Open in New Window"
(n) If the personal computer is switched to the standby or hibernation status
during monitor operation on the monitor screen or the user screen, the
monitor operation may stop after the personal computer resumes from
standby or hibernation.
In this case, restart the monitor operation.
For the setting to avoid the standby or hibernation status of personal
computer, refer to Section 6.2.7.
(o) When using Internet Explorer® 10 on Windows® 8 or Internet Explorer® 11 on
Windows® 8.1, clear "Enable Enhanced Protect Mode" in the <<Advanced>>
tab of the Internet Options.
If "Enable Enhanced Protect Mode" is selected, a monitor screen and user
screen may not be displayed.
(2) Display of administrative menu screen
(a) On individual administrative menu screens, make sure to click on the "Save"
button after changing the settings.
Switching to another screen or ending the Web browser before clicking on
the "Save" button deletes the new settings.
(b) Before complete screen is displayed, do not operate the buttons, etc.
(c) Do not use the following functions of Internet Explorer®.
• Quick Tabs
• "Open in New Tab"
• "Open in New Window"
(3) Device test and tag component test
(a) The device test or tag component test may affect the control of the
programmable controller CPU. Ensure safety before execution.
(b) An error may be produced between the value set in the tag component
setting and the actually written component value. (Refer to Section 6.2.2 (2).)
(c) In the tag component test, a rounding error may be produced when a real
number is written to the target component. (Refer to Section 6.2.2 (2).)

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(4) FTP server function (Refer to Section 6.7.1)
(a) It is required to end the FTP operation once and restart connection to FTP
from the beginning if a wrong user name or password is entered to FTP, due
to the restrictions on the FTP client side application.
Even when the correct user name or password is entered to "user" of the
FTP command, FTP may not operate normally.
(b) The maximum number of simultaneous connections to the FTP server is 10.
However, since several internal connections may be made simultaneously
depending on the FTP client, login may not be allowed even if the number of
connections does not seem to reach 10.
(c) If many files are transferred at once by FTP, a 426 (Data connection error)
error may occur.
In that case, transfer the files not at once but several times.
(d) When a file of the Web server module is overwritten via FTP, the file will be
deleted if an error occurs during write of the file.
Write the file again via FTP.
(e) In the case of FTP access by the Internet Explorer®, the user authentication
screen may not be displayed depending on the Internet Explorer®'s
specifications.
In this case, enter the Web server module address as follows:
ftp://<User name>:<Password>@<Web server module address or host
name>/
(f) To make access by Internet Explorer® 7.0/8.0/9.0/10.0/11.0 in FTP, change
the file display format of the Web server module from text format to explorer
format.
(Example) Using Microsoft® Windows® XP Professional operating system and
Internet Explorer® 8.0
[Page]  [Open FTP Site in Windows Explorer]

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Precautions for battery
In any of the following cases, erasure of data (e.g. logging data) being processed,
corruption of data in the standard ROM drive/CompactFlash card during access, or a
file system fault may occur. ( )
1) When the battery is not replaced after battery error occurrence (Refer to Section
4.10.3)
2) When shut-down operation is not performed before power off during operation
without battery (Refer to Section 4.11)
3) When the battery is removed without shut-down operation being performed (Refer
to Section 4.12)
It is recommended to back up the standard ROM data (setting information,
logging data, user HTML, etc.) to the CompactFlash card periodically in case of
corruption of data in the standard ROM drive. (Refer to Section 6.10)
Precautions for use of CompactFlash card
(1) Available CompactFlash cards
Use a CompactFlash card listed in Section 2.4. (Refer to Section 2.4.)
Failure to do so may cause a problem such as data corruption in the
CompactFlash card and system stop.
(2) When powering off the system or resetting the CPU module
When the system is powered off or the CPU module is reset during writing to the
CompactFlash card, the write processing may not be completed.
In this case, the Web server module can normally be powered off without file
access stop because it automatically restores the files when powered on again.
In rare cases, however, the module cannot completely restore files.
If a problem arises by this, perform file access stop processing before powering
off the system or resetting the CPU module.
Also, regularly backing up important data (e.g. save on other media) is
recommended. (Refer to Section 4.9.2 (1).)
(3) Removal or replacement of CompactFlash card
(a) Be sure to stop file access before removing or replacing the CompactFlash
card. (Refer to Section 4.9.2.)
(b) Failure to observe the procedures indicated in Section 4.9.2 may result in
erasure of logging data during processing, corruption of data in the
CompactFlash card during access, or a file system fault.
(c) If a CompactFlash card fault has occurred, refer to Section 9.1 (9) and
restore the card.

A - 18 A - 18
(4) Diagnostic time of CompactFlash card
(a) The Web server module executes diagnosis (including file restoration) of the
CompactFlash card when:
1) Power is turned OFF and ON, or the CPU module is reset.
2) The CompactFlash card is inserted while the power is ON.
(b) The diagnostic time of the CompactFlash card is lengthened if many files are
stored in the card.
It takes approx. 5 seconds for 100 files, and approx. 10 seconds for 1000
files.
(c) Since the following times may be lengthened due to too many files, delete
unnecessary files.
1) Rising time of the CompactFlash card setting status. (X1)
2) Web server module's ready time. (Rising time of the Module READY (X0))
(5) CompactFlash card formatting
(a) Use the formatting function of the Web server module to format the
CompactFlash card. (Refer to Section 6.10.2.)
(b) Do not format the CompactFlash card on Windows®.
If it is formatted on Windows® by mistake, recover it according to the manual
of the CompactFlash card.
(6) CompactFlash card lifetime (limited number of writes)
The CompactFlash card has its own lifetime (the limited number of writes).
For details, check the specifications of each product.
Since the lifetime of the CompactFlash card generally varies depending on its
free space, it is advisable to use the card with sufficient free space.
For the size of the data written to the CompactFlash card, refer to Appendix 7.2.
Precautions for using redundant system
(1) Applicable base units
When using the Web server module in a redundant system, always mount it to an
extension base unit designed for redundant CPU/power supply systems.
The Web server module cannot be mounted to a main base unit in redundant
systems.
(2) Access target CPU setting
(a) If the Web server module is connected to a redundant CPU, it can access
only the CPU of its own station.
Access to the other station's CPU is not allowed.
(b) If the Web server module is connected to any other than redundant CPUs, it
cannot access redundant CPUs on other stations.
(3) Tag setting
(a) When "Execute at high speed" has been selected for Sampling in Tag
setting, always create two user-setting system areas of the same size in the
redundant CPUs on both systems. (Refer to Section 6.3.3 REMARKS.)
(b) If system switching occurs in the redundant CPUs, tag collection may stop
for approx. 15 seconds.