Mitsubishi Electric MELSEC iQ-R-R00CPU Manual de usuario

MELSEC iQ-R CPU Module

User's Manual (Application)

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-R04ENCPU

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-R08PCPU

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-R16ENCPU

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SAFETY PRECAUTIONS

(Read these precautions before using this product.)

Before using MELSEC iQ-R series programmable controllers, please read the manuals for the product and the relevant

manuals introduced in those 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.

WARNING Indicates that incorrect handling may cause hazardous conditions, resulting in

death or severe injury.

CAUTION Indicates that incorrect handling may cause hazardous conditions, resulting in

minor or moderate injury or property damage.

[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) 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.

(3) 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 "General Safety Requirements" in the MELSEC iQ-R Module Configuration

Manual.

(4) Outputs may remain on or off due to a failure of a component such as a relay and 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.

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

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

●When connecting an external device with a CPU module or intelligent function module to modify data

of a running programmable controller, configure an interlock circuit in the program to ensure that the

entire system will always operate safely. For other forms of control (such as program modification,

parameter change, forced output, or operating status change) of a running programmable controller,

read the relevant manuals carefully and ensure that the operation is safe before proceeding. Improper

operation may damage machines or cause accidents.

[Design Precautions]

WARNING

●Especially, when a remote programmable controller is controlled by an external device, immediate

action cannot be taken if a problem occurs in 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.

●Do not write any data to the "system area" and "write-protect area" of the buffer memory in the

module. Also, do not use any "use prohibited" signals as an output signal from the CPU module to

each module. Doing so may cause malfunction of the programmable controller system. For the

"system area", "write-protect area", and the "use prohibited" signals, refer to the user's manual for the

module used.

●If a communication cable is disconnected, the network may be unstable, resulting in a communication

failure of multiple stations. Configure an interlock circuit in the program to ensure that the entire

system will always operate safely even if communications fail. Failure to do so may result in an

accident due to an incorrect output or malfunction.

●To maintain the safety of the programmable controller system against unauthorized access from

external devices via the network, take appropriate measures. To maintain the safety against

unauthorized access via the Internet, take measures such as installing a firewall.

[Precautions for using SIL2 Process CPUs]

●When the programmable controller complies with IEC61508 SIL2 detects a fault in the external power

supply or itself, it turns off all outputs in the safety system. Configure an external circuit to ensure that

the power source of a hazard is shut off by turning off the outputs. Failure to do so may result in an

accident.

●Configure short current protection circuits for safety relays and protection circuits, such as a fuse and

breaker, external to the programmable controller.

●When a load current exceeding the rated current or an overcurrent caused by a load short-circuit

flows, modules which are operating in SIL2 mode detect an error and turn off all outputs. Note that if

the overcurrent state continues for a long time, it may cause smoke and fire. To prevent this, configure

an external safety circuit, such as a fuse.

●When changing data and operating status, and modifying program of the running safety

programmable controller from an external device such as a personal computer connected to the SIL2

Process CPU, configure an interlock circuit in the program or external to the programmable controller

to ensure that the entire system always operates safely. In addition, before performing online

operations, determine corrective actions to be taken between the external device and SIL2 Process

CPU in case of a communication failure due to poor contact of cables.

●Do not use any "use prohibited" signals in I/O signals to each module since they are used by the

system. Do not write any data to the "use prohibited" areas in the buffer memory of a module. For the

"use prohibited" signals, refer to the user's manual for the module used. Do not turn on or off these

signals on a program since normal operations cannot be guaranteed. Doing so may cause

malfunction of the programmable controller system.

[Design Precautions]

WARNING

●Modules operating in SIL2 mode turn off outputs when they detect an error on the safety

communication path. However, the program does not automatically turn off outputs. Create a program

that turns off outputs when an error is detected on the safety communication path. If safety

communications are restored with outputs on, connected machines may suddenly operate, resulting

in an accident.

●Create an interlock circuit which uses reset buttons so that the system does not restart automatically

after executing safety functions and turning off outputs.

●In the case of a communication failure in the network, the status of the error station will be as follows:

(1) All inputs from remote I/O stations are not refreshed.

(2) All outputs from remote I/O stations are turned off.

Check the communication status information and configure an interlock circuit in the program to

ensure that the entire system will operate safely. Failure to do so may result in an accident due to an

incorrect output or malfunction.

●Outputs may remain on or off due to a failure of output modules which are operating in SIL2 mode.

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

[Precautions for using Safety CPUs]

●When the safety programmable controller detects a fault in the external power supply or itself, it turns

off all outputs in the safety system. Configure an external circuit to ensure that the power source of a

hazard is shut off by turning off the outputs. Failure to do so may result in an accident.

●Configure short current protection circuits for safety relays and protection circuits, such as a fuse and

breaker, external to the safety programmable controller.

●When a load current exceeding the rated current or an overcurrent caused by a load short-circuit

flows, the CC-Link IE Field Network remote I/O module (with safety functions) detects an error and

turns off all outputs. Note that if the overcurrent state continues for a long time, it may cause smoke

and fire. To prevent this, configure an external safety circuit, such as a fuse.

●When changing data and operating status, and modifying program of the running safety

programmable controller from an external device such as a personal computer connected to the

Safety CPU, configure an interlock circuit in the program or external to the safety programmable

controller to ensure that the entire system always operates safely. In addition, before performing

online operations, determine corrective actions to be taken between the external device and Safety

CPU in case of a communication failure due to poor contact of cables.

●Do not use any "use prohibited" signals as a remote I/O signal since they are used by the system. Do

not write any data to the "use prohibited" areas in the remote register. For the "use prohibited" signals,

refer to the MELSEC iQ-R CC-Link IE Field Network User's Manual (Application). Do not turn on or off

these signals on a program since normal operations cannot be guaranteed. Doing so may cause

malfunction of the programmable controller system.

●When the CC-Link IE Field Network remote I/O module (with safety functions) detects a CC-Link IE

Field Network error, it turns off outputs. However, the program does not automatically turn off outputs.

Create a program that turns off outputs when a CC-Link IE Field Network error is detected. If CC-Link

IE Field Network is restored with outputs on, connected machines may suddenly operate, resulting in

an accident.

[Design Precautions]

WARNING

●Create an interlock circuit which uses reset buttons so that the system does not restart automatically

after executing safety functions and turning off outputs.

●In the case of a communication failure in the network, the status of the error station will be as follows:

(1) All inputs from remote I/O stations are turned off.

(2) All outputs from remote I/O stations are turned off.

Check the communication status information and configure an interlock circuit in the program to

ensure that the entire system will operate safely. Failure to do so may result in an accident due to an

incorrect output or malfunction.

●Outputs may remain on or off due to a failure of the CC-Link IE Field Network remote I/O module (with

safety functions). Configure an external circuit for monitoring output signals that could cause a serious

accident.

[Precautions for using redundant function modules]

●The optical transmitter and receiver of the redundant function module use laser diodes (class 1 in

accordance with IEC 60825-1/JIS C6802). Do not look directly at a laser beam. Doing so may harm

your eyes.

[Design Precautions]

[Installation 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.

●Do not power off the programmable controller or reset the CPU module while the settings are being

written. Doing so will make the data in the flash ROM and SD memory card undefined. The values

need to be set in the buffer memory and written to the flash ROM and SD memory card again. Doing

so also may cause malfunction or failure of the module.

●When changing the operating status of the CPU module from external devices (such as the remote

RUN/STOP functions), select "Do Not Open by Program" for "Opening Method" of "Module

Parameter". If "Open by Program" is selected, an execution of the remote STOP function causes the

communication line to close. Consequently, the CPU module cannot reopen the line, and external

devices cannot execute the remote RUN function.

[Precautions for using SIL2 Process CPUs]

●Do not install the wiring of external devices 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.

●When selecting external devices to be connected to modules which are operating in SIL2 mode,

consider the maximum inrush current described in the user's manual for the modules used. Exceeding

the maximum inrush current may cause malfunction or failure of the modules.

[Precautions for using Safety CPUs]

●When selecting external devices to be connected to the CC-Link IE Field Network remote I/O module

(with safety functions), consider the maximum inrush current described in the CC-Link IE Field

Network Remote I/O Module (With Safety Functions) User's Manual. Exceeding the maximum inrush

current may cause malfunction or failure of the module.

WARNING

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

module. Failure to do so may result in electric shock or cause the module to fail or malfunction.

[Installation Precautions]

CAUTION

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

Guidelines included with the base unit. Failure to do so may result in electric shock, fire, malfunction,

or damage to or deterioration of the product.

●To mount a module, place the concave part(s) located at the bottom onto the guide(s) of the base unit,

and push in the module until the hook(s) located at the top snaps into place. Incorrect interconnection

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

●To mount a module with no module fixing hook, place the concave part(s) located at the bottom onto

the guide(s) of the base unit, push in the module, and fix it with screw(s). Incorrect interconnection

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 screws 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 malfunction.

●When using an SD memory card, fully insert it into the SD memory card slot. Check that it is inserted

completely. Poor contact may cause malfunction.

●Securely insert an extended SRAM cassette or a battery-less option cassette into the cassette

connector of the CPU module. After insertion, close the cassette cover and check that the cassette is

inserted completely. Poor contact may cause malfunction.

●Do not directly touch any conductive parts and electronic components of the module, SD memory

card, extended SRAM cassette, battery-less option cassette, or connector. Doing so may cause

malfunction or failure of the module.

[Precautions for using Safety CPUs]

●Use the CC-Link IE Field Network remote I/O module (with safety functions) and CC-Link IE Field

Network remote I/O module in an environment that meets the general specifications in the

corresponding manuals (CC-Link IE Field Network Remote I/O Module (With Safety Functions) User's

Manual and CC-Link IE Field Network Remote I/O Module User's Manual). Failure to do so may result

in electric shock, fire, malfunction, or damage to or deterioration of the product.

●Securely fix the CC-Link IE Field Network remote I/O module (with safety functions) and CC-Link IE

Field Network remote I/O module with a DIN rail or module fixing screws. Tighten the screws 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.

[Wiring Precautions]

WARNING

●Shut off the external power supply (all phases) used in the system before installation and wiring.

Failure to do so may result in electric shock or cause the module to fail or malfunction.

●After installation and wiring, attach a blank cover module (RG60) to each empty slot and an included

extension connector protective cover to the unused extension cable connector before powering on the

system for operation. Failure to do so may result in electric shock.

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