Mitsubishi Electric MELSEC-QS Series User guide

Safety Application Guide

A- 1

SAFETY PRECAUTIONS

(Read these precautions before using this product.)

Before using the product, please read this manual, the relevant manuals introduced in this manual,

standard programmable controller manuals, and the safety standards 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.

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.

A- 2

[Design Precautions]

WARNING

When a safety programmable controller detects an error in an external power supply or a failure in

programmable controller main module, it turns off all the outputs.

Create an external circuit to securely stop the power of hazard by turning off the outputs.

Incorrect configuration may result in an accident.

Create short current protection for a safety relay, and a protection circuit such as a fuse, and breaker,

outside a safety programmable controller.

If load current more than the rating or overcurrent due to a short circuit in the load has flowed in the

CC-Link Safety remote I/O module, the module defines it as a fault and turns off all the outputs.

However, if overcurrent flows in the CC-Link Safety remote I/O module for a long time, it may cause

smoke or a fire. To prevent it, create a safety circuit such as a fuse outside the module.

When data/program change, or status control is performed from a PC to a running safety

programmable controller, create an interlock circuit outside the sequence program and safety

programmable controller to ensure that the whole system always operates safely.

For the operations to a safety programmable controller, pay full attention to safety by reading the

relevant manuals carefully, and establishing the operating procedure.

Furthermore, for the online operations performed from a PC to a safety CPU module, the corrective

actions against a communication error due to a cable connection fault, etc. should be predetermined

as a system.

All output signals from a safety CPU module to the CC-Link Safety master modules are prohibited to

use.

These signals can be found in the CC-Link Safety System Master Module User's Manual.

Do not turn ON or OFF these signals by sequence program, since turning ON/OFF these output

signals of the programmable controller system may cause malfunctions and safety operation cannot

be guaranteed.

All output signals from a safety CPU module to the CC-Link IE Field Network master/local modules

(with safety functions) are prohibited to use.

These signals can be found in the MELSEC-QS CC-Link IE Field Network Master/Local Module

User's Manual.

Do not turn ON or OFF these signals by sequence program, since turning ON/OFF these output

signals of the programmable controller system may cause malfunctions and safety operation cannot

be guaranteed.

A- 3

[Design Precautions]

WARNING

When a CC-Link Safety remote I/O module has detected CC-Link Safety error, it turns off all the

outputs.

Note that the outputs in a sequence program are not automatically turned off.

If CC-Link Safety or CC-Link IE Field Network error has been detected, create a sequence program

that turns off the outputs in the program.

If the CC-Link Safety or CC-Link IE Field Network is restored with the outputs on, it may suddenly

operate and result in an accident.

To inhibit restart without manual operation after safety functions was performed and outputs were

turned OFF, create an interlock program which uses a reset button for restart.

CAUTION

Do not bunch the wires of external devices or communication cables together with the main circuit or

power lines, or install them close to each other.

They should be installed 100mm or more from each other.

Not doing so could result in noise that would cause malfunctions.

Select the external devices to be connected to the CC-Link Safety remote I/O module, considering

the maximum inrush current with reference to the CC-Link Safety System Remote I/O Module User's

Manual.

A- 4

[Installation Precautions]

[Wiring Precautions]

CAUTION

Use a safety programmable controller in the environment that meets the general specifications

described in the QSCPU 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 failure or drop.

Secure the module to the base unit with screws.

Tighten the screw in the specified torque range.

If the screws are too loose, it may cause a drop of the screw or module.

Overtightening may cause a drop due to the damage of the screw or module.

Make sure to fix the CC-Link Safety remote I/O module with a DIN rail or fixing screws and tighten

the screws with the specified torque.

If the screws are too loose, it may cause a drop of the screw or module.

Overtightening may cause a drop due to the damage of the screw or module.

Completely turn off the external supply power used in the system before mounting or removing the

module.

Not doing so could result in damage to the product.

Do not directly touch the module's conductive parts or electronic components.

Doing so may cause malfunctions or a failure.

WARNING

Be sure to shut off all phases of the external supply power used by the system before wiring.

Not completely turning off all power could result in electric shock or damage to the product.

When energizing or operating the module after installation or wiring, be sure to close the attached

terminal cover.

Not doing so may result in electric shock.

A- 5

[Wiring Precautions]

CAUTION

Ground the FG and LG terminals correctly.

Not doing so could result in electric shock or malfunctions.

Use a solderless terminal with insulation sleeve for wiring of a terminal block.

Use up to two solderless terminals for a single terminal.

Use applicable solderless terminals and tighten them with the specified torque. If any solderless

spade terminal is used, it may be disconnected when the terminal screw comes loose, resulting in a

failure.

Wire the module correctly after confirming the rated voltage and terminal layout.

Connecting a power supply of a different rated voltage or incorrect wiring may cause a fire or failure.

Tighten a terminal block mounting screw, terminal screw, and module fixing screw within the

specified torque range.

If the terminal block mounting screw or terminal screw is too loose, it may cause a short circuit, fire,

or malfunctions.

If too tight, it may damage the screw and/or the module, resulting in a drop of the screw or module, a

short circuit or malfunctions.

If the module fixing screw is too loose, it may cause a drop of the screw or module.

Overtightening the screw may cause a drop due to the damage of the screw or module.

Be sure there are no foreign substances such as sawdust or wiring debris inside the module.

Such debris could cause a fire, failure, or malfunctions.

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.

A- 6

[Wiring Precautions]

CAUTION

Be sure to fix the communication cables or power cables by ducts or clamps when connecting them

to the module.

Failure to do so may cause damage of the module or cables due to a wobble, unintentional shifting,

or accidental pull of the cables, or malfunctions due to poor contact of the cable.

When removing the connected communication cables or power cables, do not pull the cable with

grasping the cable part.

Remove the cable connected to the terminal block after loosening the terminal block screws.

Pulling the cable connected to a module may result in malfunctions or damage of the module or

cable.

For the cables to be used in the CC-Link Safety, use the ones specified by the manufacturer.

Otherwise, the performance of the CC-Link Safety is not guaranteed.

As to the maximum overall cable length and station - to station cable length, follow the specifications

described in the CC-Link Safety System Master Module User's Manual.

If not following the specification, the normal data transmission is not guaranteed.

For the cables to be used in CC-Link IE Field Network, use the ones specified by the manufacturer.

Otherwise, the performance of CC-Link IE Field Network is not guaranteed.

As to the maximum overall cable length and station - to station cable length, follow the specifications

described in the MELSEC-QS CC-Link IE Field Network Master/Local Module User's Manual.

If not following the specification, the normal data transmission is not guaranteed.

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 the QSCPU User's Manual (Hardware Design, Maintenance and

Inspection).

A- 7

[Startup and Maintenance precautions]

WARNING

Do not touch the terminals while power is on.

Doing so could result in electric shock.

Correctly connect the battery connector.

Also, do not charge, disassemble, heat, place in fire, short circuit, or solder the battery.

Mishandling of battery can cause overheating, cracks, or ignition which could result in injury and

fires.

Turn off all phases of the external supply power used in the system when cleaning the module or

retightening the terminal block mounting screws, terminal screws, or module fixing screws.

Not doing so could result in electric shock.

Tighten a terminal block mounting screw, terminal screw, and module fixing screw within the

specified torque range.

If the terminal block mounting screw or terminal screw is too loose, it may cause a short circuit, fire,

or malfunctions.

If too tight, it may damage the screw and/or the module, resulting in a drop of the screw or module, a

short circuit or malfunctions.

If the module fixing screw is too loose, it may cause a drop of the screw or module.

Overtightening the screw may cause a drop due to the damage of the screw or module.

CAUTION

The online operations performed from a PC to a running safety programmable controller (Program

change when a safety CPU module is RUN, device test, and operating status change such as

RUN-STOP switching) have to be executed after the manual has been carefully read and the safety

has been ensured.

Following the operating procedure predetermined at designing, the operation has to be performed by

an instructed person.

When changing a program while a safety CPU module is RUN (Write during RUN), it may cause a

program breakdown in some operating conditions.

Fully understand the precautions described in the GX Developer's manual before use.

Do not disassemble or modify the modules.

Doing so could cause a failure, malfunctions, injury, or fire.

If the product is repaired or remodeled by other than the specified FA centers or us, the warranty is

not covered.

Use any radio communication device such as a cellular phone or a PHS phone more than 25cm

away in all directions of safety programmable controller.

Not doing so can cause malfunctions.

A- 8

[Startup and Maintenance precautions]

[Disposal Precautions]

[Transportation Precautions]

CAUTION

Completely turn off the external supply power used in the system before mounting or removing the

module.

Not doing so may result in a failure or malfunctions of the module.

Restrict the mounting/removal of a module, base unit, and terminal block up to 50 times (IEC

61131-2 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 may result in a failure or malfunctions of the module.

Since the module case is made of resin, do not drop or apply any strong impact to the module.

Doing so may damage the module.

Shut off the external power supply (all phases) used in the system before installing or removing a

module to/from a control panel.

Not doing so may result in a failure or malfunctions of the module.

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 of the Battery Directive in EU member states, refer to the QSCPU User's Manual

(Hardware Design, Maintenance and Inspection).)

CAUTION

When transporting lithium batteries, make sure to treat them based on the transport regulations.

(For details of the controlled models, refer to the QSCPU User's Manual (Hardware Design,

Maintenance and Inspection).)

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