Mitsubishi Electric MELSEC iQ-R Series User Manual page 6

[Design Precautions]
CAUTION
● Do not install the control lines or communication cables together with the main circuit lines or power
cables. Doing so may result in malfunction due to electromagnetic interference. Keep a distance of
100mm or more between those cables.
● 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 and failure of the module.
● When changing the operating status of the CPU module from external devices (such as remote RUN/
STOP), select "Do Not Open by Program" for "Opening Method" in the module parameters. If "Open
by Program" is selected, an execution of remote STOP causes the communication line to close.
Consequently, the CPU module cannot reopen the communication line, and external devices cannot
execute the remote RUN.
[Security Precautions]
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]
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.
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