Mitsubishi MELSEC Q Series User manual

A- 1
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.
In this manual, the safety instructions are ranked as "DANGER" and "CAUTION".
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.
DANGER
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.

A- 2
[Design Precautions]
DANGER
Install a safety circuit external to the programmable controller that keeps the entire system safe even
when there are problems with the external power supply or the programmable controller module.
Otherwise, trouble could result from erroneous output or erroneous operation.
(1) Outside the programmable controller, construct mechanical damage preventing interlock circuits
such as emergency stop, protective circuits, positioning upper and lower limits switches and
interlocking forward/reverse operations.
(2) When the programmable controller detects the following problems,
it will stop calculation and turn off all output in the case of (a).
In the case of (b), it will hold or turn off all output according to the parameter setting.
Note that the AnS/A series module will turn off the output in either of cases (a) and (b).
In addition, all output will be turned on when there are problems that the programmable
controller CPU cannot detect, such as in the I/O controller. Build a fail safe circuit exterior to the
programmable controller that will make sure the equipment operates safely at such times.
Refer to " LOADING AND INSTALLATION" in QCPU User's Manual (Hardware Design,
Maintenance and Inspection) for example fail safe circuits.
(3) Output could be left on or off when there is trouble in the outputs module relay or transistor. So
build an external monitoring circuit that will monitor any single outputs that could cause serious
trouble.
Q series module AnS/A series module
(a) The power supply module has
over currentprotection equipment
and over voltage protection
equipment.
Output OFF Output OFF
(b) The CPU module self-diagnosis
functions, such as the watchdog
timer error, detect problems.
Hold or turn off all
output according to
the parameter setting. Output OFF

A- 3
[Design Precautions]
DANGER
When overcurrent which exceeds the rating or caused by short-circuited load flows in the output
module for a long time, it may cause smoke or fire. To prevent this, configure an external safety
circuit, such as fuse.
Build a circuit that turns on the external power supply when the programmable controller main
module power is powered on.
If the external power supply is turned on first, it could result in erroneous output or erroneous
operation.
When there are communication problems with the data link, refer to the corresponding data link
manual for the operating status of each station.
Not doing so could result in erroneous output or erroneous operation.
When connecting a peripheral device to the CPU module or connecting a personal computer or the
like to the intelligent function module / special function module to exercise control (data change) on
the running programmable controller, configure up an interlock circuit in the sequence program to
ensure that the whole system will always operate safely.
Also before exercising other control (program change, operating status change (status control)) on
the running programmable controller, read the manual carefully and fully confirm safety.
Especially for the above control on the remote programmable controller from an external device, an
immediate action may not be taken for programmable controller trouble due to a data communication
fault.
In addition to configuring up the interlock circuit in the sequence program, corrective and other
actions to be taken as a system for the occurrence of a data communication fault should be
predetermined between the external device and programmable controller CPU.
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.
When controlling items like lamp load, heater or solenoid valve using an output module, large current
(approximately ten times greater than that present in normal circumstances) may flow when the
output is turned OFF to ON.
Take measures such as replacing the module with one having sufficient rated current.

A- 4
[Installation Precautions]
CAUTION
Use the programmable controller in an environment that meets the general specifications contained
in QCPU User’s Manual (Hardware Design, Maintenance and Inspection).
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.
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.
When installing extension cables, be sure that the base unit and the extension module connectors
are installed correctly.
After installation, check them for looseness.
Poor connections could cause an input or output failure.
Securely load the memory card into the memory card loading connector.
After installation, check for lifting.
Poor connections could cause an operation fault.
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.Note that the module can be
changed online (while power is on) in the system that uses the CPU module compatible with online
module change or on the MELSECNET/H remote I/O station.
Note that there are restrictions on the modules that can be changed online(while power is on), and
each module has its predetermined changing procedure.
For details, refer to QCPU User's Manual (Hardware Design, Maintenance and Inspection) and the
online module change section in the manual of the module compatible with online module change.
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.
When using the Motion CPU module or motion module, be sure to check that the combination of
modules is correct before power-on.
The product may be damaged if the combination is incorrect.
For details, refer to the user's manual for the Motion CPU module.

A- 5
[Wiring Precautions]
DANGER
Completely turn off the externally supplied power used in the system when installing or placing
wiring.
Not completely turning off all power could result in electric shock or damage to the product.
When turning on the power supply or operating the module after installation or wiring work, be sure
that the module's terminal covers are correctly attached.
Not attaching the terminal cover could result in electric shock.

A- 6
DANGER
Be sure to ground the FG terminals and LG terminals to the protective ground conductor.
Not doing so could result in electric shock or erroneous operation.
When wiring in the programmable controller, be sure that it is done correctly by checking the
product's rated voltage and the terminal layout.
Connecting a power supply that is different from the rating or incorrectly wiring the product could
result in fire or damage.
External connections shall be crimped or pressure welded with the specified tools, or correctly
soldered.
Imperfect connections could result in short circuit, fires, or erroneous operation.
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.
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.
Install our programmable controller in a control panel for use.
Wire the main power supply to the power supply module installed in a control panel through a
distribution terminal block.
Furthermore, the wiring and replacement of a power supply module have to be performed by a
maintenance worker who acquainted with shock protection.
(For the wiring methods, refer to QCPU User's Manual (Hardware Design, Maintenance and
Inspection))

A- 7
[Startup and Maintenance Precautions]
DANGER
Do not touch the terminals while power is on.
Doing so could cause shock or erroneous operation.
Correctly connect the battery.
Also, do not charge, disassemble, heat, place in fire, short circuit, or solder the battery.
Mishandling of battery can cause overheating or cracks which could result in injury and fires.
Switch off all phases of the externally supplied power used in the system when cleaning the module
or retightening the terminal or module mounting screws.
Not doing so could result in electric shock.
Undertightening of terminal screws can cause a short circuit or malfunction.
Overtightening of screws can cause damages to the screws and/or the module, resulting in fallout,
short circuits, or malfunction.

A- 8
[Startup and Maintenance Precautions]
CAUTION
The online operations conducted for the CPU module being operated, connecting the peripheral
device (especially, when changing data or operation status), shall be conducted after the manual has
been carefully read and a sufficient check of safety has been conducted.
Operation mistakes could cause damage or problems with of the module.
Do not disassemble or modify the modules.
Doing so could cause trouble, erroneous operation, injury, or fire.
Use any radio communication device such as a cellular phone or a PHS phone more than 25cm
(9.85 inch) away in all directions of the programmable controller.
Not doing so can cause a malfunction.
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.
Note that the module can be changed online (while power is on) in the system that uses the CPU
module compatible with online module change or on the MELSECNET/H remote I/O station.
Note that there are restrictions on the modules that can be changed online (while power is on) , and
each module has its predetermined changing procedure.
For details, refer to QCPU User's Manual (Hardware Design, Maintenance and Inspection) and the
online module change section in the manual of the module compatible with online module change.
Do not mount/remove the module onto/from base unit more than 50 times (IEC61131-2-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 or give an impact to the battery mounted to the module.
Doing so may damage the battery, causing the battery fluid to leak inside the battery.
If the battery is dropped or given an impact, dispose of it without using.
Before touching the module, always touch grounded metal, etc. to discharge static electricity from
human body, etc.
Not doing so can cause the module to fail or malfunction.