Mitsubishi MELSEC-A A1SCPUC24-R2 Manuale utente

Mitsubishi Programmable Controller

User's Manual

(Hardware)

Thank you for purchasing the Mitsubishi programmable controller

MELSEC-A series.

Type A1SCPUC24-R2/A1SHCPU/

A2SHCPU(S1)/A2ASCPU(S1/S30)/

A2USHCPU-S1

Prior to use, please read both this and relevant manuals thoroughly

to fully understand the product.

MODEL A1S/A2S/A2ASCPU

(H/W)-U-E

MODEL

CODE 13JE59

IB(NA)-66468-R(1112)MEE

A-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

Create a safety circuit outside the programmable controller to ensure the

whole system will operate safely even if an external power failure or a

programmable controller failure occurs.

Otherwise, incorrect output or malfunction may cause an accident.

(1) For an emergency stop circuit, protection circuit and interlock circuit that

is designed for incompatible actions such as forward/reverse rotation or

for damage prevention such as the upper/lower limit setting in

positioning, any of them must be created outside the programmable

controller.

Install the emergency stop switch outside the controlpanel so that

workers can operate it easily.

WARNING

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.

CAUTION

A-2

[DESIGN PRECAUTIONS]

WARNING

(2) When the programmable controller detects the following error

conditions, it stops the operation and turn off all the outputs.

• The overcurrent protection device or overvoltage protection device of

the power supply module is activated.

• The programmable controller CPU detects an error such as a

watchdog timer error by the self-diagnostics function.

In the case of an error of a part such as an I/O control part that cannot be

detected by the programmable controller CPU, all the outputs may turn

on. In order to make all machines operate safely in such a case, set up a

fail-safe circuit or a specific mechanism outside the programmable

controller.

Refer to "LOADING AND INSTALLATION" in this manual for example

fail safe circuits.

(3) Depending on the failure of the output module’s relay or transistor, the

output status may remain ON or OFF incorrectly. For output signals that

may lead to a serious accident, create an external monitoring circuit.

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

load has flowed in the output module for a long time, it may cause a fire and

smoke. Provide an external safety device such as a fuse.

Design a circuit so that the external power will be supplied after power-up of

the programmable controller.

Activating the external power supply prior to the programmable controller

may result in an accident due to incorrect output or malfunction.

For the operation status of each station at a communication error in data link,

refer to the respective data link manual.

The communication error may result in an accident due to incorrect output or

malfunction.

A-3

[DESIGN PRECAUTIONS]

WARNING

When controlling a running programmable controller (data modification) by

connecting a peripheral device to the CPU module or a PC to a special

function module, create an interlock circuit on sequence programs so that the

whole system functions safely all the time.

Also, before performing any other controls (e.g. program modification,

operating status change (status control)), read the manual carefully and

ensure the safety.

In these controls, especially the one from an external device to a

programmable controller in a remote location, some programmable controller

side problem may not be resolved immediately due to failure of data

communications.

To prevent this, create an interlock circuit on sequence programs and

establish corrective procedures for communication failure between the

external device and the programmable controller CPU.

When setting up the system, do not allow any empty slot on the base unit.

If any slot is left empty, be sure to use a blank cover (A1SG60) or a dummy

module (A1SG62) for it.

When using the extension base unit, A1S52B(S1), A1S55B(S1) or

A1S58B(S1), attach the included dustproof cover to the module in slot 0.

Otherwise, internal parts of the module may be flied in the short circuit test or

when an overcurrent or overvoltage is accidentally applied to external I/O

section.

A-4

CAUTION

Do not install the control lines or communication cables together with the

main circuit or power lines, or bring them close to each other.

Keep a distance of 100mm (3.94inch) or more between them.

Failure to do so may cause malfunctions due to noise.

When an output module is used to control the lamp load, heater, solenoid

valve, etc., a large current (ten times larger than the normal one) may flow at

the time that the output status changes from OFF to ON. Take some

preventive measures such as replacing the output module with the one of a

suitable current rating.

Time from when the CPU module is powered on or is reset to when it enters

in RUN status dependson the system configuration, parameter settings, and

program size.

Design the program so that the entire system will always operate safely,

regardless of the time.

A-5

[INSTALLATION PRECAUTIONS]

CAUTION

Use the programmable controller under the environment specified in the

user’s manual.

Otherwise, it may cause electric shocks, fires, malfunctions, product

deterioration or damage.

Insert the module fixing projection into the fixing hole in the base unit and

then tighten the module mounting screw within the specified torque.

When no screw is tightened, even if the module is installed correctly, it may

cause malfunctions, a failure or a drop of the module.

Tightening the screw excessively may damage the screw and/or the module,

resulting in a drop of the module, a short circuit or malfunctions.

Connect the extension cable to the connector of the base unit or module.

Check the cable for incomplete connection after connecting it.

Poor electrical contact may cause incorrect inputs and/or outputs.

Correctly connect the memory cassette installation connector to the memory

cassette. After installation, be sure that the connection is not loose.

A poor connection could cause an operation failure.

Be sure to shut off all phases of the external power supply used by the

system before mounting or removing the module. Failure to do so may

damage the module.

Do not directly touch the conductive part or electronic components of the

module.

Doing so may cause malfunctions or a failure of the module.

A-6

[WIRING PRECAUTIONS]

WARNING

Be sure to shut off all phases of the external power supply used by the

system before wiring.

Failure to do so may result in an electric shock or damage of the product.

Before energizing and operating the system after wiring, be sure to attach the

terminal cover supplied with the product.

Failure to do so may cause an electric shock.

CAUTION

Always ground the FG and LG terminals to the protective ground conductor.

Failure to do so may cause an electric shock or malfunctions.

Wire the module correctly after confirming the rated voltage and terminal

layout.

Connecting a power supply of a different voltage rating or incorrect wiring

may cause a fire or failure.

Do not connect multiple power supply modules to one module in parallel.

The power supply modules may be heated, resulting in a fire or failure.

Press, crimp or properly solder the connector for external connection with the

specified tool.

Incomplete connection may cause a short circuit, fire or malfunctions.

Tighten terminal screws within the specified torque range. If the 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 short

circuit or malfunctions.

Carefully prevent foreign matter such as dust or wire chips from entering the

module.

Failure to do so may cause a fire, failure or malfunctions.

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 Type A1SCPUC24-R2/A1SHCPU/

A2SHCPU(S1)/A2ASCPU(S1/S30)/A2USHCPU-S1 User’s Manual

(Hardware))

A-7

[STARTUP AND MAINTENANCE PRECAUTIONS]

WARNING

Do not touch any terminal during power distribution.

Doing so may cause an electric shock.

Properly connect batteries. Do not charge, disassemble, heat or throw them

into the fire and do not make them short-circuited and soldered. Incorrect

battery handling may cause personal injuries or a fire due to exothermic heat,

burst and/or ignition.

Be sure to shut off all phases of the external power supply used by the

system before cleaning or retightening the terminal screws or module

mounting screws.

Failure to do so may result in an electric shock.

If they are too loose, it may cause a short circuit or malfunctions.

If too tight, it may cause damage to the screws and/or module, resulting in an

accidental drop of the module, short circuit or malfunctions.

CAUTION

When performing online operations (especially, program modification, forced

output or operating status change) by connecting a peripheral device to the

running CPU module, read the manual carefully and ensure the safety.

Incorrect operation will cause mechanical damage or accidents.

Do not disassemble or modify each of modules.

Doing so may cause failure, malfunctions, personal injuries and/or a fire.

When using a wireless communication device such as a mobile phone, keep

a distance of 25cm (9.84inch) or more from the programmable controller in all

directions.

Failure to do so may cause malfunctions.

Be sure to shut off all phases of the external power supply used by the

system before mounting or removing the module.

Failure to do so may result in failure or malfunctions of the module.

Do not drop or apply any impact to the battery.

Doing so may damage the battery, resulting in electrolyte spillage inside the

battery.

If any impact has been applied, discard the battery and never use it.

Do not install/remove the terminal block more than 50 times after the first use

of the product. (IEC 61131-2 compliant)

Before handling modules, touch a grounded metal object to discharge the

static electricity from the human body.

Failure to do so may cause failure or malfunctions of the module.

A-8

[DISPOSAL PRECAUTIONS]

[TRANSPORTATION PRECAUTIONS]

CAUTION

When disposing of the product, treat it as an 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 User's

manual for the CPU module used.)

CAUTION

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

transportation regulations. (Refer to Appendix 2 for details of the relevant

models.)

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