Mitsubishi MELSEC L Series User manual

1
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.
In this manual, the safety precautions are classified into two levels: " WARNING" and " CAUTION".
Under some circumstances, failure to observe the precautions given under " CAUTION" may lead to
serious consequences.
Observe the precautions of both levels because they are important for personal and system safety.
Make sure that the end users read this manual and then keep the manual in a safe place for future
reference.
[Design Precautions]
WARNING
●Configure safety circuits external to the programmable controller to ensure that the entire system
operates safely even when a fault occurs in the external power supply or the programmable
controller. Failure to do so may result in an accident due to an incorrect output or malfunction.
(1) Emergency stop circuits, protection circuits, and protective interlock circuits for conflicting
operations (such as forward/reverse rotations or upper/lower limit positioning) must be
configured external to the programmable controller.
(2) Machine OPR (Original Point Return) of the positioning function is controlled by two kinds of
data: an OPR direction and an OPR speed. Deceleration starts when the near-point watchdog
signal turns on. If an incorrect OPR direction is set, motion control may continue without
deceleration. To prevent machine damage caused by this, configure an interlock circuit external
to the programmable controller.
(3) When the CPU module detects an error during control by the positioning function, the motion
slows down and stops.
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 minor or moderate injury or property damage.

2
[Design Precautions]
WARNING
(4) When the programmable controller detects an abnormal condition, it stops the operation and all
outputs are:
• Turned off if the overcurrent or overvoltage protection of the power supply module is activated.
• Held or turned off according to the parameter setting if the self-diagnostic function of the CPU
module detects an error such as a watchdog timer error.
Also, all outputs may be turned on if an error occurs in a part, such as an I/O control part,
where the CPU module cannot detect any error. To ensure safety operation in such a case,
provide a safety mechanism or a fail-safe circuit external to the programmable controller. For a
fail-safe circuit example, refer to Page 398, Appendix 8.
(5) Outputs may remain on or off due to a failure of a component such as a transistor in an output
circuit. Configure an external circuit for monitoring output signals that could cause a serious
accident.
●In an output circuit, when a load current exceeding the rated current or an overcurrent caused by a
load short-circuit flows for a long time, it may cause smoke and fire. To prevent this, configure an
external safety circuit, such as a fuse.
●Configure a circuit so that the programmable controller is turned on first and then the external power
supply. If the external power supply is turned on first, an accident may occur due to an incorrect
output or malfunction.
●Configure a circuit so that the external power supply is turned off first and then the programmable
controller. If the programmable controller is turned off first, an accident may occur due to an incorrect
output or malfunction.
●For the operating status of each station after a communication failure, refer to relevant manuals for
each network. Incorrect output or malfunction due to a communication failure may result in an
accident.
●When changing data from a peripheral device connected to the CPU module to the running
programmable controller, 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.
●An absolute position restoration by the positioning function may turn off the servo-on signal (servo
off) for approximately 20ms, and the motor may run unexpectedly. If this causes a problem, provide
an electromagnetic brake to lock the motor during absolute position restoration.

3
[Design Precautions]
[Installation Precautions]
[Installation Precautions]
[Wiring 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.
●During control of an inductive load such as a lamp, heater, or solenoid valve, a large current
(approximately ten times greater than normal) may flow when the output is turned from off to on.
Therefore, use a module that has a sufficient current rating.
●After the CPU module is powered on or is reset, the time taken to enter the RUN status varies
depending on the system configuration, parameter settings, and/or program size.
Design circuits so that the entire system will always operate safely, regardless of the time.
WARNING
●Shut off the external power supply for the system in all phases before mounting or removing a
module. Failure to do so may result in electric shock or cause the module to fail or malfunction.
CAUTION
●Use the programmable controller in an environment that meets the general specifications in this
manual. 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, or drop of the module.
●Do not directly touch any conductive parts and electronic components of the module. Doing so can
cause malfunction or failure of the module.
●Securely connect an extension cable to the connectors of a branch module and an extension
module. After connections, check that the cable is inserted completely. Poor contact may cause
malfunction.
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 module before turning it on for
operation. Failure to do so may result in electric shock.

4
[Wiring Precautions]
CAUTION
●Ground the FG and LG terminals to the protective ground conductor dedicated to the programmable
controller. Failure to do so may result in electric shock or malfunction.
●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 terminal block screw comes loose,
resulting in failure.
●Check the rated voltage and terminal layout before wiring to the module, and connect the cables
correctly. Connecting a power supply with a different voltage rating or incorrect wiring may cause a
fire or failure.
●Connectors for external devices must be crimped or pressed with the tool specified by the
manufacturer, or must be correctly soldered. Incomplete connections may cause short circuit, fire, or
malfunction.
●Securely connect the connector to the module.
●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.
●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.
●Check the interface type and correctly connect the cable.
Incorrect wiring (connecting the cable to an incorrect interface) may cause failure of the module and
external device.
●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 screw. Pulling the cable connected to the module may result in malfunction or
damage to the module or cable.
●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.
●To use the high-speed counter function, ground the shield cable on the encoder side (relay box).
Always ground the FG and LG terminals to the protective ground conductor. Failure to do so may
cause malfunction.
●Mitsubishi programmable controllers must be installed in control panels. Connect the main power
supply to the power supply module in the control panel through a relay terminal block.
Wiring and replacement of a power supply module must be performed by qualified maintenance
personnel with knowledge of protection against electric shock. For wiring methods, refer to Page 31,
CHAPTER 4.

5
[Startup and Maintenance Precautions]
[Startup and Maintenance Precautions]
WARNING
●Do not touch any terminal while power is on. Doing so will cause electric shock or malfunction.
●Correctly connect the battery connector. Do not charge, disassemble, heat, short-circuit, solder, or
throw the battery into the fire. Also, do not expose it to liquid or strong shock.
Doing so will cause the battery to produce heat, explode, ignite, or leak, resulting in injury and fire.
●Shut off the external power supply for the system in all phases before cleaning the module or
retightening the terminal block screw. Failure to do so may result in electric shock.
CAUTION
●Before performing online operations (especially, program modification, forced output, and operating
status change) for the running CPU module from the peripheral device connected, read relevant
manuals carefully and ensure the safety. Improper operation may damage machines or cause
accidents.
●Do not disassemble or modify the modules. Doing so may cause failure, malfunction, injury, or a fire.
●Use any radio communication device such as a cellular phone or PHS (Personal Handy-phone
System) more than 25cm away in all directions from the programmable controller. Failure to do so
may cause malfunction.
●Shut off the external power supply for the system in all phases before mounting or removing a
module. Failure to do so may cause the module to fail or malfunction.
●Tighten the terminal block screw within the specified torque range. Undertightening can cause drop
of the component or wire, 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 product (module, display unit, and terminal block), the number of
connections/disconnections is limited to 50 times (in accordance with IEC 61131-2). Exceeding the
limit may cause malfunction.
●After the first use of the SD memory card, the number of insertions/removals is limited to 500 times.
Exceeding the limit may cause malfunction.
●Do not drop or apply shock to the battery to be installed in the module. Doing so may damage the
battery, causing the battery fluid to leak inside the battery. If the battery is dropped or any shock is
applied to it, dispose of it without using.
●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.
●Before testing the operation by the positioning function, set a low speed value for the speed limit
parameter so that the operation can be stopped immediately upon occurrence of a hazardous
condition.

6
[Disposal Precautions]
[Transportation Precautions]
CAUTION
●When disposing of this product, treat it as industrial waste. When disposing of batteries, separate
them from other wastes according to the local regulations. (For details on battery regulations in EU
member states, refer to Page 404, Appendix 11.)
CAUTION
●When transporting lithium batteries, follow the transportation regulations. (For details on the
regulated models, refer to Page 403, Appendix 10.)

7
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;
• 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 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.

8
INTRODUCTION
Thank you for purchasing the Mitsubishi MELSEC-L series programmable controllers.
This manual describes the specifications of the hardware, such as CPU modules and power supply modules,
maintenance and inspection of the system, and troubleshooting.
Before using this 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.
Relevant CPU modules: L02CPU, L26CPU-BT, L02CPU-P, and L26CPU-PBT
Remark
This manual does not describe the details of the instructions.
For the instructions, refer to the following.
MELSEC-Q/L Programming Manual (Common Instruction)

9
RELEVANT MANUALS
(1) CPU module user's manual
(2) Programming manual
(3) Operating manual
Manual name
<manual number (model code)> Description
MELSEC-L CPU Module User's Manual (Function Explanation, Program
Fundamentals)
<SH-080889ENG, 13JZ35>
Functions and devices of the CPU module, and programming
MELSEC-L CPU Module User's Manual (Built-In Ethernet Function)
<SH-080891ENG, 13JZ37> The built-in Ethernet function of the CPU module
MELSEC-L CPU Module User's Manual (Built-In I/O Function)
<SH-080892ENG, 13JZ38>
The general-purpose I/O function, interrupt input function, pulse catch function,
positioning function, and high-speed counter function of the CPU module
MELSEC-L CPU Module User's Manual (Data Logging Function)
<SH-080893ENG, 13JZ39> The data logging function of the CPU module
Manual name
<manual number (model code)> Description
MELSEC-Q/L Programming Manual (Common Instruction)
<SH-080809ENG, 13JW10> Detailed description and usage of instructions used in programs
MELSEC-Q/L/QnA Programming Manual (SFC)
<SH-080041, 13JF60>
System configuration, specifications, functions, programming, and error codes
for SFC (MELSAP3) programs
MELSEC-Q/L Programming Manual (MELSAP-L)
<SH-080076, 13JF61>
System configuration, specifications, functions, programming, and error codes
for SFC (MELSAP-L) programs
MELSEC-Q/L Programming Manual (Structured Text)
<SH-080366E, 13JF68> System configuration and programming using structured text language
MELSEC-Q/L/QnA Programming Manual (PID Control Instructions)
<SH-080040, 13JF59> Dedicated instructions for PID control
Manual name
<manual number (model code)> Description
GX Works2 Version1 Operating Manual (Common)
<SH-080779ENG, 13JU63>
System configuration, parameter settings, and online operations (common to
Simple project and Structured project) of GX Works2
GX Developer Version 8 Operating Manual
<SH-080373E, 13JU41>
Operating methods of GX Developer, such as programming, printing,
monitoring, and debugging

10
(4) I/O module and intelligent function module manual
Manual name
<manual number (model code)> Description
MELSEC-L I/O Module User's Manual
<SH-080888ENG, 13JZ34> Specifications and troubleshooting of the I/O module
MELSEC-L Serial Communication Module User's Manual (Basic)
<SH-080894ENG, 13JZ40>
System configuration, specifications, procedures before operation, data
communication methods (basic), and troubleshooting of the serial
communication module
MELSEC-Q/L Serial Communication Module User's Manual (Application)
<SH-080007, 13JL87>
Special functions (specifications, usage, and settings) and data
communication methods (application) of the serial communication module
MELSEC-Q/L MELSEC Communication Protocol Reference Manual
<SH-080008, 13JF89>
Details of MELSEC communication protocol (MC protocol) that is used for
data communication between a target device and a CPU module
MELSEC-L CC-Link System Master/Local Module User's Manual
<SH-080895ENG, 13JZ41>
Settings, specifications, handling, data communication methods, and
troubleshooting of the built-in CC-Link function of the CPU module or the CC-
Link system master/local module
MELSEC-L CC-Link IE Field Network Master/Local Module User's Manual
<SH-080972ENG, 13JZ54>
Overview of CC-Link IE Field Network, and specifications, procedures before
operation, system configuration, installation, wiring, settings, functions,
programming, and troubleshooting of the MELSEC-L series CC-Link IE Field
Network master/local module
MELSEC-L Analog-Digital Converter Module User's Manual
<SH-080899ENG, 13JZ42>
System configuration, specifications, settings, and troubleshooting of the
analog-digital converter module
MELSEC-L Digital-Analog Converter Module User's Manual
<SH-080900ENG, 13JZ43>
System configuration, specifications, settings, and troubleshooting of the
digital-analog converter module
MELSEC-L LD75P/LD75D Positioning Module User's Manual
<SH-080911ENG, 13JZ46>
System configuration, specifications, settings, and troubleshooting of the
positioning module
MELSEC-L High-Speed Counter Module User's Manual
<SH-080920ENG, 13JZ49>
System configuration, specifications, settings, and troubleshooting of the high-
speed counter module
MELSEC-L Temperature Control Module User's Manual
<SH-081000ENG, 13JZ64>
System configuration, specifications, settings, and troubleshooting of the
temperature control module

11
Memo

CONTENTS
12
CONTENTS
SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
CONDITIONS OF USE FOR THE PRODUCT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
RELEVANT MANUALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
MANUAL PAGE ORGANIZATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
TERMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
PACKING LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
CHAPTER 1 FEATURES 22
CHAPTER 2 SYSTEM CONFIGURATION 24
2.1 Overall System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2.2 Precautions for Configuring a System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
2.3 Peripheral Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
CHAPTER 3 SYSTEM START-UP PROCEDURE 29
CHAPTER 4 INSTALLATION AND WIRING 31
4.1 Installation Environment and Installation Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
4.1.1 Installation environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
4.1.2 Installation position. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
4.2 Mounting the Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.2.1 Precautions for connecting and mounting modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.2.2 Connecting modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.2.3 Mounting the modules on a DIN rail. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.2.4 Changing modules on a DIN rail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
4.2.5 Attaching and removing a display unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
4.2.6 Mounting and removing a terminal block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
4.2.7 Inserting and removing an SD memory card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
4.3 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
4.3.1 Wiring to power supply modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
4.3.2 Wiring to an 18-point screw terminal block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
4.3.3 Wiring to a spring clamp terminal block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
4.3.4 Wiring to connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
4.3.5 Connecting extension cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
4.3.6 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
CHAPTER 5 GENERAL SPECIFICATIONS 57
CHAPTER 6 CPU MODULE 59
6.1 Part Names. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
6.2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
6.3 Hardware Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
6.3.1 Switch operation after a program is written to the CPU module . . . . . . . . . . . . . . . . . . . . . . 64
6.3.2 Reset operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

13
CHAPTER 7 POWER SUPPLY MODULE 66
7.1 Part Names. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
7.2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
7.2.1 Specification list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
7.2.2 Details on items in specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
7.2.3 Precautions for power capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
CHAPTER 8 END COVER 69
8.1 Part Names. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
8.2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
CHAPTER 9 BRANCH MODULE AND EXTENSION MODULE 72
9.1 Part Names. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72
9.2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
CHAPTER 10 RS-232 ADAPTER 74
10.1 Part Names. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
10.2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
10.3 Connecting a RS-232 Cable at All Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
CHAPTER 11 DISPLAY UNIT 76
11.1 Part Names. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
11.2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
CHAPTER 12 SD MEMORY CARD 78
12.1 Part Names. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
12.2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
12.3 Forced Disablement of SD Memory Card. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
CHAPTER 13 BATTERY 81
13.1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
CHAPTER 14 MAINTENANCE AND INSPECTION 83
14.1 Daily Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83
14.2 Periodic Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85
14.3 Battery Replacement Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86
14.4 Operation Restart After Being Stored . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89
CHAPTER 15 TROUBLESHOOTING 90
15.1 Checking the System Visually . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

14
15.1.1 When the POWER LED does not turn on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
15.1.2 When the MODE LED does not turn on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
15.1.3 When the RUN LED does not turn on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
15.2 Checking the Error Details. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
15.3 Checking for Functional Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
15.3.1 Write to PLC and Read from PLC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
15.3.2 Boot operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
15.3.3 Ethernet communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
15.3.4 Socket communication function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
15.3.5 Simple PLC communication function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
15.3.6 General-purpose I/O function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
15.3.7 Interrupt input function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
15.3.8 Pulse catch function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
15.3.9 Positioning function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
15.3.10 High-speed counter function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
15.3.11 Display unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
15.3.12 Transmission from an external device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
15.3.13 Operating status of the CPU module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
15.3.14 END cover with ERR terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
15.3.15 Extension system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
15.4 Troubleshooting for the Built-In I/O Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120
15.4.1 Troubleshooting for input circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
15.4.2 Troubleshooting for output circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
15.5 Saving Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .124
APPENDICES 128
Appendix 1 Error Code List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .128
Appendix 1.1 Error codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Appendix 1.2 Reading error codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Appendix 1.3 Error code list (1000 to 1999). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Appendix 1.4 Error code list (2000 to 2999). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Appendix 1.5 Error code list (3000 to 3999). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
Appendix 1.6 Error code list (4000 to 4999). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190
Appendix 1.7 Error code list (5000 to 5999). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
Appendix 1.8 Error code list (6000 to 6999). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Appendix 1.9 Error code list (7000 to 10000) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216
Appendix 1.10 Clearing an error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220
Appendix 1.11 Error codes returned to request source during communication with CPU module
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
Appendix 2 Special Relay List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .245
Appendix 3 Special Register List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .291
Appendix 4 Battery Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .377
Appendix 4.1 Battery life list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 378
Appendix 5 Checking Serial Number and Function Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .380
Appendix 6 Applicable Software Versions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .382
Appendix 7 EMC and Low Voltage Directives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .383

15
Appendix 7.1 Measures to comply with the EMC Directive . . . . . . . . . . . . . . . . . . . . . . . . . . 383
Appendix 7.2 Measures to comply with the Low Voltage Directive . . . . . . . . . . . . . . . . . . . . . 395
Appendix 8 General Safety Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .398
Appendix 9 Calculating Heating Value of Programmable Controller. . . . . . . . . . . . . . . . . . . . . . . .401
Appendix 9.1 Calculating the average power consumption. . . . . . . . . . . . . . . . . . . . . . . . . . 401
Appendix 10 Precautions for Battery Transportation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .403
Appendix 11 Handling of Batteries and Devices with Built-In Batteries in EU Member States . . . . .404
Appendix 12 External Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .405
Appendix 12.1 CPU module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 405
Appendix 12.2 Power supply module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 406
Appendix 12.3 Display unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 407
Appendix 12.4 Branch module and extension module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 407
Appendix 12.5 Other optional items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 408
INDEX 410
REVISIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 412
WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 413

16
MANUAL PAGE ORGANIZATION
In this manual, pages are organized and the symbols are used as shown below.
The following page illustration is for explanation purpose only, and is different from the actual pages.
*1 The mouse operation example is provided below. (For GX Works2)
The section of
the current page is shown.
The chapter of
the current page is shown.
"" is used for
screen names and items.
[ ] is used for items
in the menu bar and
the project window.
shows operating
procedures.
shows reference
manuals.
shows notes that
requires attention.
shows mouse
operations.*1
shows
reference pages.
shows setting or
operating examples.
Ex.
shows useful
information.
A window selected in the view selection area is displayed.
View selection area
[Online] [Write to PLC...]
Select [Online] on the menu bar,
and then select [Write to PLC...].
Project window [Parameter]
[PLC Parameter]
Select [Project] from the view selection
area to open the Project window.
Menu bar
Ex.
Ex.
In the Project window, expand [Parameter] and
select [PLC Parameter].

17
TERMS
Unless otherwise specified, this manual uses the following terms.
*1 MELSEC-L series products do not support this network.
Term Description
CPU module The abbreviation for the MELSEC-L series CPU module
Power supply module The abbreviation for the MELSEC-L series power supply module
Branch module The abbreviation for the MELSEC-L series branch module
Extension module The abbreviation for the MELSEC-L series extension module
END cover A cover to be attached to the right side of the rightmost MELSEC-L series module
Display unit A liquid crystal display to be attached to the CPU module
Battery
A battery to be installed in the CPU module and used for backing up data such as the standard RAM data
and latch device data in case of power failure.
The Q6BAT and Q7BAT are available.
SD memory card Secure Digital Memory Card, which is a flash memory device.
The L1MEM-2GBSD and L1MEM-4GBSD are available.
Extension cable The abbreviation for the MELSEC-L series extension cable
LCPU Another term for the MELSEC-L series CPU module
QCPU Another term for the MELSEC-Q series CPU module
QnUCPU Another term for the MELSEC-Q series Universal model QCPU
Programming tool A generic term for GX Works2 and GX Developer
GX Works2
The product name of the software package for the MELSEC programmable controllers
GX Developer
GX Configurator-SC A setting and monitoring tool added in GX Developer (for serial communication modules)
GX Configurator-AD A setting and monitoring tool added in GX Developer (for A/D converter modules)
GX Configurator-DA A setting and monitoring tool added in GX Developer (for D/A converter modules)
GX Configurator-CT A setting and monitoring tool added in GX Developer (for high-speed counter modules)
GX Configurator-QP A setting and monitoring tool (for positioning modules)
CC-Link
The abbreviation for Control & Communication Link
A field network system where data processing for control and information can be simultaneously performed
at high speed.
CC-Link IE A generic term for CC-Link IE Controller Network*1 and CC-Link IE Field Network
Intelligent function module A MELSEC-L series module that has functions other than input or output, such as A/D converter module and
D/A converter module
I/O module The abbreviation for the MELSEC-L series I/O module
Head module The abbreviation for the LJ72GF15-T2 CC-Link IE Field Network head module
CC-Link IE module A generic term for a CC-Link IE Controller Network module*1 and a CC-Link IE Field Network master/local
module
Drive unit (servo amplifier)
A unit used to amplify the power and control the motor in the operation by the positioning function since the
signals, such as pulses, that are output from the CPU module are low voltage and small current. The unit,
also called a servo amplifier, is provided with a servomotor and step motor.
Main block A block where a CPU module is connected in an extension system
Extension block A block where an extension module is connected in an extension system
MC protocol The abbreviation for the MELSEC communication protocol, a protocol to access a CPU module from a
target device in the Ethernet or serial communication
Built-in CC-Link function The abbreviation for the L26CPU-BT and L26CPU-PBT built-in CC-Link system master/local function

18
PACKING LIST
The following items are included in the package of this product. Before use, check that all the items are included.
L02CPU
CPU module (L02CPU) + END cover (L6EC)
(A dummy cover for the display unit is attached.) Safety Guidelines (IB(NA)-0800456)
Battery (Q6BAT)
(installed in the CPU module)
Battery replacement data stickers to fill out
(three stickers on one sheet)