Mitsubishi Electric Melsec q00ujcpu Manuale utente

Programmable Controller

User's Manual

(Function Explanation,

Program Fundamentals)

QnUCPU

INDUSTRIAL AUTOMATION

MITSUBISHI ELECTRIC

01 12 2008

SH(NA)-080807ENG

Version A

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: " DANGER" and " CAUTION".

Under some circumstances, failure to observe the precautions given under " CAUTION" may lead to

serious consequences.

Make sure that the end users read this manual and then keep the manual in a safe place for future

reference.

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 minor or moderate injury or property damage.

A-2

[Design Precautions]

DANGER

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) Configure external safety circuits, such as an emergency stop circuit, protection circuit, and

protective interlock circuit for forward/reverse operation or upper/lower limit positioning.

(2) The programmable controller stops its operation upon detection of the following status, and the

output status of the system will be as shown below.

All outputs may turn on when an error occurs in the part, such as 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 Chapter 10 LOADING AND INSTALLATION in the QCPU User's Manual

(Hardware Design, Maintenance and Inspection).

(3) Outputs may remain on or off due to a failure of an output module relay or transistor. Configure

an external circuit for monitoring output signals that could cause a serious accident.

Output

All outputs are turned off.

All outputs are held or turned off according to

the parameter setting.

Overcurrent or overvoltage protection of the power supply module

is activated.

The CPU module detects an error such as a watchdog timer error

by the self-diagnostic function.

Status

A-3

[Design Precautions]

DANGER

In an output module, 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.

For the operating status of each station after a communication failure, refer to relevant manuals for

the network.

Incorrect output or malfunction due to a communication failure may result in an accident.

When changing data of the running programmable controller from a peripheral connected to the

CPU module or from a personal computer connected to an intelligent function module, configure an

interlock circuit in the sequence program to ensure that the entire system will always operate safely.

For program modification and operating status change, read relevant manuals carefully and ensure

the safety before 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 sequence program, and determine corrective

actions to be taken between the external device and CPU module in case of a communication

failure.

CAUTION

Do not install the control lines or communication cables together with the main circuit lines or power

cables.

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

Failure to do so may result in malfunction due to noise.

When a device such as a lamp, heater, or solenoid valve is controlled through an output module, a

large current (approximately ten times greater than normal) may flow when the output is turned from

off to on.

Take measures such as replacing the module with one having a sufficient current rating.

A-4

[Installation Precautions]

CAUTION

Use the programmable controller in an environment that meets the general specifications in the

QCPU User's Manual (Hardware Design, Maintenance and Inspection).

Failure to do so may result in electric shock, fire, malfunction, or damage to or deterioration of the

product.

To mount the module, while pressing the module mounting lever located in the lower part of the

module, fully insert the module fixing projection(s) into the hole(s) in the base unit and press the

module until it snaps into place.

Incorrect mounting may cause malfunction, failure or drop of the module.

When using the programmable controller in an environment of frequent vibrations, fix the module

with a screw.

Tighten the screw within the specified torque range.

Undertightening can cause drop of the screw, short circuit or malfunction.

Overtightening can damage the screw and/or module, resulting in drop, short circuit, or malfunction.

When using an extension cable, connect it to the extension cable connector of the base unit securely.

Check the connection for looseness.

Poor contact may cause incorrect input or output.

When using a memory card, fully insert it into the memory card slot.

Check that it is inserted completely.

Poor contact may cause malfunction.

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 damage to the product.

A module can be replaced online (while power is on) on any MELSECNET/H remote I/O station or in

the system where a CPU module supporting the online module change function is used.

Note that there are restrictions on the modules that can be replaced online, and each module has its

predetermined replacement procedure.

For details, refer to the relevant sections in the QCPU User's Manual (Hardware Design,

Maintenance and Inspection) and in the manual for the corresponding module.

Do not directly touch any conductive part of the module.

Doing so can cause malfunction or failure of the module.

When using a Motion CPU module and modules designed for motion control, check that the

combinations of these modules are correct before applying power.

The modules 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

Shut off the external power supply for the system in all phases before wiring.

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

After wiring, attach the included terminal cover to the module before turning it on for operation.

Failure to do so may result in electric shock.

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 the terminal 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 connection must be crimped or pressed with the tool specified by the

manufacturer, or must be correctly soldered.

Incomplete connections could result in short circuit, fire, or malfunction.

Tighten the terminal 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, or malfunction.

Prevent foreign matter such as dust or wire chips from entering the module.

Such foreign matter can cause a fire, failure, or malfunction.

A-6

[Wiring Precautions]

[Startup and Maintenance Precautions]

DANGER

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.

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 maintenance personnel

who is familiar with protection against electric shock. (For wiring methods, refer to the QCPU User's

Manual (Hardware Design, Maintenance and Inspection)).

DANGER

Do not touch any terminal while power is on.

Doing so will cause electric shock.

Correctly connect the battery connector.

Do not charge, disassemble, heat, short-circuit, solder, or throw the battery into the fire.

Doing so will cause the battery to produce heat, explode, or ignite, 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 screws or module fixing screws.

Failure to do so may result in electric shock.

Undertightening the terminal screws can cause short circuit or malfunction.

Overtightening can damage the screw and/or module, resulting in drop, short circuit, or malfunction.

A-7

[Startup and Maintenance Precautions]

CAUTION

Before performing online operations (especially, program modification, forced output, and operation

status change) for the running CPU module from the peripheral 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 (9.85 inches) 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 the

module. Failure to do so may cause the module to fail or malfunction.

A module can be replaced online (while power is on) on any MELSECNET/H remote I/O station or in

the system where a CPU module supporting the online module change function is used.

Note that there are restrictions on the modules that can be replaced online, and each module has its

predetermined replacement procedure.

For details, refer to the relevant sections in the QCPU User's Manual (Hardware Design,

Maintenance and Inspection) and in the manual for the corresponding module.

After the first use of the product, do not mount/remove the module to/from the base unit, and the

terminal block to/from the module more than 50 times (IEC 61131-2 compliant) respectively.

Exceeding the limit of 50 times 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 grounded metal object 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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