Mitsubishi Electric MELSEC Q Series User manual

MELSEC-Q C Controller Module User's Manual

-Q24DHCCPU-V

-Q24DHCCPU-VG

-Q24DHCCPU-LS

-Q26DHCCPU-LS

-Q12DCCPU-V(Extended mode)

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.

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

reference.

[Design Precautions]

WARNING

●Configure safety circuits external to the C Controller module to ensure that the entire system

operates safely even when a fault occurs in the external power supply or the C Controller module.

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) If the following status (a) or (b) occurs, the system will behave accordingly.

(a)When overcurrent or overvoltage protection of the power supply module is activated, the

outputs (Y) from the user program and writing to the buffer memory are disabled, and all

outputs are turned off.

(b)When the C Controller module detects an error such as a watchdog timer error by the

selfdiagnostic function, the outputs (Y) from the user program and writing to the buffer

memory are disabled. Whether to hold or turn off all outputs can be set by parameters.

All outputs may turn on when an error occurs in the part, such as I/O control part, where the C

Controller 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 C Controller module. For a fail-safe circuit

example, refer to "Page 493, Appendix 11".

(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.

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.

[Design Precautions]

WARNING

●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 C Controller system 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.

●When there are communication problems with the data link, refer to the corresponding data link

manual for the operating status of each station. Incorrect output or malfunction may result in an

accident.

●When connecting a peripheral device to the CPU module or connecting a personal computer or the

like to the intelligent function module to exercise control (data change) on the running C Controller

module, configure up an interlock circuit in the user 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 C Controller module, read the manual carefully and fully

confirm safety. Especially for the above control on the remote C Controller module from an external

device, an immediate action may not be taken for C Controller module trouble due to a data

communication fault. In addition to configuring up the interlock circuit in the user 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 CPU module.

●Do not write data into the write-protected area within the intelligent function module buffer memory.

Further, do not output (ON) prohibited signals in the output signals from the CPU module to the

intelligent function module. Writing data to the write-protected area or output of prohibited signals

may cause malfunction of the C Controller system.

●For the write-protected area and prohibited signals, refer to the User's Manual for each intelligent

function module.

●If the communication cable is disconnected, the line becomes unstable and any communication

problem may occur in multiple stations of the network. Even if any network communication problem

occurs in the multiple stations, configure up an interlock circuit in the user program to ensure safe

operation of the system. Failure to do so may result in an accident due to an incorrect output or

malfunction.

●In the refresh parameter settings, "Y" cannot be specified for link output (LY) refresh device and

remote output (RY) refresh device. Therefore, the device prior to STOP remains in the event of CPU

STOP.

[Design Precautions]

[Security 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 (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.

●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 setting, and/or program size. Design circuits so

that the entire system will always operate safely, regardless of the time.

●While registering various settings, do not power OFF the station with a module installed, and reset

the CPU module. Powering off the station with a module installed and registering the CPU module

during registration make the internal ROM setting data uncertain and re-setting and re-registration

are required. Moreover, it will result in module fault and malfunction.

●When the CPU module or remote I/O module parameters are modified, be sure to reset the CPU

module. Previous data remaining in the module may cause the module to fail or malfunction.

WARNING

●To maintain the security (confidentiality, integrity, and availability) of the programmable controller and

the system against unauthorized access, denial-of-service (DoS) attacks, computer viruses, and

other cyberattacks from external devices via the network, take appropriate measures such as

firewalls, virtual private networks (VPNs), and antivirus solutions.

[Installation Precautions]

CAUTION

●Use the C Controller module in an environment that meets the general specifications in this manual.

Failure to do so may result in an 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 module in an environment of frequent vibrations, fix the module with a

screw.

For any module with module fitting(s), place each module on the base unit first and then fix it with the

module fitting(s).

●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 connector of the base unit or module securely.

Check the connection for looseness. Poor contact may cause incorrect input or output.

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

contact may cause malfunction.

●When using a CompactFlash card, fully insert it into the CompactFlash 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. The system using a CPU module

ready for the online module change, and the MELSECNET/H remote I/O station are exchangeable in

the online state (while power is on). However, there are limited number of modules that are

exchangeable in the online state (while power is on) and a replacement procedures is defined for

each module. For details, refer to the QCPU User's Manual (Hardware Design, Maintenance and

Inspection) and the online module change section in the respective manual for each online

exchangeable module.

●Do not directly touch any conductive part of the module. Doing so can cause malfunction or failure of

the module.

●When using the Motion CPU module and the Motion module, be sure to check if the module

combination is correct before powering up. Use of improper combination may result in damage to the

product. For details, refer to the User's Manual for the module used.

[Wiring Precautions]

WARNING

●Shut off the external power supply for the system in all phases before installation and 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 C controller

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

●Use compatible solderless terminals and tighten them to the specified torque. Use of lead-type

solderless terminals may cause the terminal screws be loosened, leading to a 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.

●Crimp, weld or properly solder the external connectors and co-axial cable connectors with tools

specified by the manufacturer. Incomplete connections could result in short circuit, fire or

malfunction.

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

power cables.

It should be at least 100 mm apart.Doing so may result in malfunction due to noise.

●Be sure to place in a duct or fix by clamps the power cords and cables connected to the module. If

not, dangling cable may swing or inadvertently be pulled, resulting in damage to the module or

cables or malfunctions due to poor contact.

●Tightening torque for the terminal screws should be in the specified range. Undertightening the

terminal screws can cause short circuit, fire or malfunction. Overtightening can damage the terminal

screw and/or module, resulting in drop, short circuit, or malfunction.

[Wiring Precautions]

[Startup and Maintenance Precautions]

CAUTION

●Tightening torque for the connector mounting screws should be in the specified range.

Undertightening the screws can cause short circuit, fire or malfunction. Overtightening can damage

the screw and/or module, resulting in drop, short circuit, fire or malfunction.

●Securely install connectors to the module. Improper installation can cause malfunction.

●When disconnecting a cable from the module, do not hold and pull the cable part.For a cable with

connector, hold the connected connector by hand to disconnect the cable. For terminal block cables,

loosen the terminal block terminal screws first. Pulling the cable while being connected to the module

will result in malfunction or damage to the module or the cable.

●Check the type of interface to connect in advance in order to properly connect cables. Connection or

wiring to wrong interface can cause a failure of the module and external device.

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

cause a fire, failure, or malfunction.

●To prevent foreign matters such as wire chips from entering into the module during wiring, a sealing

label is attached to the top of the module. During wiring, do not remove this label. During system

operation, be sure to remove this label to release the heat.

●Use the C Controller module as being installed in the control panel. Let the main power wiring

through the relay terminal block to the PLC power supply unit installed in the control panel. Further,

replacement and wiring of the power supply module must be performed by maintenance personnel

fully trained for electric shock protection. For wiring procedures, refer to the QCPU User's Manual

(Hardware Design, Maintenance and Inspection).

WARNING

●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, module failure or malfunction. Undertightening the terminal screws can cause resulting in

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

drop, short circuit, or malfunction.