Mitsubishi LJ61BT11 User manual

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•SAFETY PRECAUTIONS •
(Read these precautions before using this product.)
Before using this product, please read this manual and the relevant manuals carefully and pay full
attention to safety to handle the product correctly.
The precautions given in this manual are concerned with this product only. For the safety precautions of
the programmable controller system, please read the user's manual of the CPU module used.
In this manual, the safety precautions are classified into two levels: " !WARNING" and " !CAUTION".
Indicates that incorrect handling may cause hazardous conditions,
resulting in death or severe injury.
Indicates that incorrect handling may cause hazardous conditions,
resulting in minor or moderate injury or property damage.
Under some circumstances, failure to observe the precautions given under " !CAUTION" may lead to
serious consequences.
Observe the precautions of both levels because they are important for personal and system safety.
Make sure that the end users read this manual and then keep the manual in a safe place for future
reference.
[Design Precautions]
!WARNING
•For the operating status of each station after a communication failure, refer to Section 8.2.6 in
this manual.
Failure to do so may result in an accident due to an incorrect output or malfunction.
•When changing data of a running programmable controller from a peripheral connected to the
CPU module or from an external device such as a personal computer connected to an intelligent
function module, configure an interlock circuit in the program to ensure that the entire system
will always operate safely.
For other controls to a running programmable controller (such as program modification or
operating status change), read relevant manuals carefully and ensure the safety before the
operation.
Especially, in the case of a control from an external device to a remote programmable controller,
immediate action cannot be taken for a problem on the programmable controller due to a
communication failure.
To prevent this, configure an interlock circuit in the program, and determine corrective actions to
be taken between the external device and CPU module in case of a communication failure.
!WARNING
!CAUTION

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[Design Precautions]
!WARNING
•Do not write any data to the "system area" of the buffer memory in each intelligent function
module.
Also, do not turn on any "use prohibited" signal that is output from the CPU module to the
intelligent function module.
Writing data to the "system area" or outputting a "use prohibited" signal may cause malfunction
of the programmable controller system.
•When setting auto refresh parameters, specify "Y" for the remote output RY refresh devices.
Specifying any other than "Y" (for example, M or L) will hold the previous device status in the
case of a CPU stop.
For how to stop a data link, refer to Section 8.3.8.
•Disconnection of a CC-Link dedicated cable may make the line condition unstable, causing
communication errors on multiple stations on the network.
Configure an interlock circuit in the program so that the system will operate safely even if these
communication errors occur on multiple stations.
Failure to do so may result in an accident due to an incorrect output or malfunction.
[Design Precautions]
!CAUTION
•Do not install the control lines or communication cables together with the main circuit lines or
power cables.
Keep a distance of 100mm or more between them.
Failure to do so may result in malfunction due to noise.
[Installation Precautions]
!WARNING
•Shut off the external power supply for the system in all phases before mounting or removing the
module.
Failure to do so may result in electric shock or cause the module to fail or malfunction.

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[Installation Precautions]
!CAUTION
•Use the programmable controller in an environment that meets the general specifications shown
in "Safety Guidelines", the manual supplied with the CPU module or head module.
Failure to do so may result in electric shock, fire, malfunction, or damage to or deterioration of
the product.
•To interconnect modules, engage the respective connectors and securely lock the module joint
levers.
Incorrect interconnection may cause malfunction, failure, and drop of the module.
•Do not directly touch any conductive part and electronic components of the module.
Doing so can cause malfunction or failure of the module.
[Wiring Precautions]
!WARNING
•Shut off the external power supply for the system in all phases before wiring.
Failure to do so may result in electric shock or cause the module to fail or malfunction.
•After installation and wiring, attach the included terminal cover to the product before turning it on
for operation.
Failure to do so may result in electric shock.
[Wiring Precautions]
!CAUTION
•Use applicable solderless terminals and tighten them within the specified torque range.
If any spade solderless terminal is used, it may be disconnected when a screw on the terminal
block comes loose, resulting in failure.
•Do not install the control lines or communication cables together with the main circuit lines or
power cables.
Failure to do so may result in malfunction due to noise.
•Place the cables in a duct or clamp them.
If not, dangling cable may swing or inadvertently be pulled, resulting in damage to the module or
cables or malfunction due to poor contact.
•Tighten the terminal block screw within the specified torque range.
Undertightening can cause short circuit, fire, or malfunction.
Overtightening can damage the screw and/or module, resulting in drop, short circuit, fire, or
malfunction.
•When disconnecting the cable from the module, do not pull the cable by the cable part.
For the cable with connector, hold the connector part of the cable.
For the cable connected to the terminal block, loosen the terminal block screws.
Pulling the cable connected to the module may result in malfunction and damage to the module
or cable.

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[Wiring Precautions]
!CAUTION
•Prevent foreign matter such as dust or wire chips from entering the module.
Such foreign matter can cause a fire, failure, or malfunction.
•A protective film is attached to the top of the module to prevent foreign matter, such as wire
chips, from entering the module during wiring.
Do not remove the film during wiring.
Remove it for heat dissipation before system operation.
•For the CC-Link system, use dedicated cables that are specified by the manufacturer.
If any other cable is used, performance of the CC-Link system is not guaranteed.
Also, the maximum overall cable length and the station-to-station cable length must meet those
specified in Chapter 3.
If not, normal data communication is not guaranteed.
[Startup and Maintenance Precautions]
!WARNING
•Do not touch any terminal while power is on.
Doing so will cause electric shock or malfunction.
•Shut off the external power supply for the system in all phases before cleaning the module or
retightening the screws on the terminal block.
Failure to do so may result in electric shock.
[Startup and Maintenance Precautions]
!CAUTION
•Do not disassemble or modify the modules.
Doing so may cause failure, malfunction, injury, or a fire.
•Shut off the external power supply for the system in all phases before connecting or
disconnecting the module.
Failure to do so may cause the module to fail or malfunction.
•Tighten the screws on the terminal block within the specified torque range.
Undertightening can cause drop of parts or wires, short circuit, or malfunction.
Overtightening can damage the screw and/or module, resulting in drop, short circuit, or
malfunction.
•After the first use of the module, the number of module connections/disconnections is limited to
50 times.
Exceeding the limit (in accordance with IEC 61131-2) may cause malfunction.
•Before handling the module, touch a conducting object such as a grounded metal to discharge
the static electricity from the human body.
Failure to do so may cause the module to fail or malfunction.

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[Disposal Precautions]
!CAUTION
•When disposing of this product, treat it as industrial waste.

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•CONDITIONS OF USE FOR THE PRODUCT •
(1) Mitsubishi programmable controller ("the PRODUCT") shall be used in conditions;
i) where any problem, fault or failure occurring in the PRODUCT, if any, shall not lead to any major or
serious accident; and
ii) where the backup and fail-safe function are systematically or automatically provided outside of the
PRODUCT for the case of any problem, fault or failure occurring in the PRODUCT.
(2) The PRODUCT has been designed and manufactured for the purpose of being used in general
industries.
MITSUBISHI SHALL HAVE NO RESPONSIBILITY OR LIABILITY (INCLUDING, BUT NOT LIMITED
TO ANY AND ALL RESPONSIBILITY OR LIABILITY BASED ON CONTRACT, WARRANTY, TORT,
PRODUCT LIABILITY) FOR ANY INJURY OR DEATH TO PERSONS OR LOSS OR DAMAGE TO
PROPERTY CAUSED BY the PRODUCT THAT ARE OPERATED OR USED IN APPLICATION NOT
INTENDED OR EXCLUDED BY INSTRUCTIONS, PRECAUTIONS, OR WARNING CONTAINED IN
MITSUBISHI'S USER, INSTRUCTION AND/OR SAFETY MANUALS, TECHNICAL BULLETINS AND
GUIDELINES FOR the PRODUCT.
("Prohibited Application")
Prohibited Applications include, but not limited to, the use of the PRODUCT in;
yNuclear Power Plants and any other power plants operated by Power companies, and/or any other
cases in which the public could be affected if any problem or fault occurs in the PRODUCT.
yRailway companies or Public service purposes, and/or any other cases in which establishment of a
special quality assurance system is required by the Purchaser or End User.
yAircraft or Aerospace, Medical applications, Train equipment, transport equipment such as Elevator
and Escalator, Incineration and Fuel devices, Vehicles, Manned transportation, Equipment for
Recreation and Amusement, and Safety devices, handling of Nuclear or Hazardous Materials or
Chemicals, Mining and Drilling, and/or other applications where there is a significant risk of injury to
the public or property.
Notwithstanding the above, restrictions Mitsubishi may in its sole discretion, authorize use of the
PRODUCT in one or more of the Prohibited Applications, provided that the usage of the PRODUCT is
limited only for the specific applications agreed to by Mitsubishi and provided further that no special
quality assurance or fail-safe, redundant or other safety features which exceed the general
specifications of the PRODUCTs are required. For details, please contact the Mitsubishi
representative in your region.

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INTRODUCTION
Thank you for purchasing the Mitsubishi MELSEC-L series programmable controllers.
This manual explains the functions and programming required to use the L26CPU-BT built-in CC-Link
system master/local function and the LJ61BT11 CC-Link system master/local module (hereinafter referred to
as the L series master/local module).
Before using the product, please read this manual and the relevant manuals carefully and develop familiarity
with the functions and performance of the MELSEC-L series programmable controller to handle the product
correctly.
When applying the program examples introduced in this manual to the actual system, ensure the applicability
and confirm that it will not cause system control problems.
Please make sure that the end users read this manual.
REMARK
The program examples shown in this manual are the examples in which the L
series master/local module is assigned to the I/O No. X/Y00 to X/Y1F unless
otherwise specified. When using program samples described in the manual, the
assignment of I/O No. is required.
For the assignment of I/O No., refer to the following manual.
MELSEC-L CPU Module User's Manual (Function Explanation, Program
Fundamentals)
This manual explains the operation using GX Works2. When using GX Developer,
refer to Appendix 7.

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COMPLIANCE WITH THE EMC AND LOW VOLTAGE DIRECTIVES
(1) For programmable controller system
To configure a system meeting the requirements of the EMC and Low Voltage Directives when
incorporating the Mitsubishi programmable controller (EMC and Low Voltage Directives compliant)
into other machinery or equipment, refer to "Safety Guidelines", the manual supplied with the CPU
module or head module.
The CE mark, indicating compliance with the EMC and Low Voltage Directives, is printed on the
rating plate of the programmable controller.
(2) For the product
For the compliance of this product with the EMC and Low Voltage Directives, refer to "Safety
Guidelines", the manual supplied with the CPU module or head module.